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%YAML 1.1
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---
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# Suricata configuration file. In addition to the comments describing all
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# options in this file, full documentation can be found at:
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# https://redmine.openinfosecfoundation.org/projects/suricata/wiki/Suricatayaml
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# Number of packets allowed to be processed simultaneously. Default is a
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# conservative 1024. A higher number will make sure CPU's/CPU cores will be
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# more easily kept busy, but may negatively impact caching.
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#
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# If you are using the CUDA pattern matcher (mpm-algo: ac-cuda), different rules
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# apply. In that case try something like 60000 or more. This is because the CUDA
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# pattern matcher buffers and scans as many packets as possible in parallel.
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max-pending-packets: 1024
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# Runmode the engine should use. Please check --list-runmodes to get the available
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# runmodes for each packet acquisition method. Defaults to "autofp" (auto flow pinned
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# load balancing).
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# runmode: workers
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runmode: single
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# If suricata box is a router for the sniffed networks, set it to 'router'. If
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# it is a pure sniffing setup, set it to 'sniffer-only'.
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# If set to auto, the variable is internally switch to 'router' in IPS mode
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# and 'sniffer-only' in IDS mode.
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# This feature is currently only used by the reject* keywords.
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host-mode: auto
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# Preallocated size for packet. Default is 1514 which is the classical
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# size for pcap on ethernet. You should adjust this value to the highest
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# packet size (MTU + hardware header) on your system.
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default-packet-size: 1518
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# The default logging directory. Any log or output file will be
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# placed here if its not specified with a full path name. This can be
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# overridden with the -l command line parameter.
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default-log-dir: logdir
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# Unix command socket can be used to pass commands to suricata.
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# An external tool can then connect to get information from suricata
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# or trigger some modifications of the engine. Set enabled to yes
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# to activate the feature. You can use the filename variable to set
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# the file name of the socket.
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unix-command:
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enabled: no
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# global stats configuration
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stats:
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enabled: yes
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# The interval field (in seconds) controls at what interval
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# the loggers are invoked.
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interval: 1
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# Add decode events as stats.
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#decoder-events: true
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# Decoder event prefix in stats. Has been 'decoder' before, but that leads
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# to missing events in the eve.stats records. See issue #2225.
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decoder-events-prefix: "decoder.event"
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# Add stream events as stats.
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#stream-events: false
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# Configure the type of alert (and other) logging you would like.
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outputs:
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# Extensible Event Format (nicknamed EVE) event log in JSON format
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- eve-log:
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enabled: yes
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filetype: regular #regular|syslog|unix_dgram|unix_stream
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filename: eve-json.log
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append: no
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types:
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- alert:
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http: yes # enable dumping of http fields
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metadata: no
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xff:
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enabled: no
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mode: overwrite
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deployment: forward
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header: X-Forwarded-For
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- http:
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file: yes # convey info for files in http logging
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extended: yes # enable this for extended logging information
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ratelimit: 300
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dump-all-headers: both
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xff:
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enabled: no
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mode: overwrite
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deployment: forward
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header: X-Forwarded-For
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- files:
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force-magic: no # force magic on all logged files
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stored-only: yes
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xff:
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enabled: no
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mode: overwrite
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deployment: forward
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header: X-Forwarded-For
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- stats:
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totals: yes # stats for all threads merged together
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threads: yes # per thread stats
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threads-compact: true
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deltas: no # include delta values
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- flow-snip:
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xff:
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enabled: no
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mode: overwrite
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deployment: forward
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header: X-Forwarded-For
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# Stats.log contains data from various counters of the suricata engine.
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# The interval field (in seconds) tells after how long output will be written
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# on the log file.
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- stats:
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enabled: yes
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append: no
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totals: yes # stats for all threads merged together
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threads: no # per thread stats
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deltas: no # include delta values
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null-values: no
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# output module to store extracted files to disk
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#
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# File extraction depends on a lot of things to be fully done:
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# - stream reassembly depth. For optimal results, set this to 0 (unlimited)
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# - http request / response body sizes. Again set to 0 for optimal results.
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# - rules that contain the "filestore" keyword.
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- file-store:
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version: 2
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enabled: yes
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dir: files # directory to store the files
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force-magic: yes # force logging magic on all stored files
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stream-depth: 0
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xff:
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enabled: "no"
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mode: overwrite
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deployment: forward
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header: X-Forwarded-For
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magic-type: MAGIC_MIME_TYPE
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# The detection engine builds internal groups of signatures. The engine
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# allow us to specify the profile to use for them, to manage memory on an
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# efficient way keeping a good performance. For the profile keyword you
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# can use the words "low", "medium", "high" or "custom". If you use custom
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# make sure to define the values at "- custom-values" as your convenience.
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# Usually you would prefer medium/high/low.
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#
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# "sgh mpm-context", indicates how the staging should allot mpm contexts for
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# the signature groups. "single" indicates the use of a single context for
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# all the signature group heads. "full" indicates a mpm-context for each
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# group head. "auto" lets the engine decide the distribution of contexts
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# based on the information the engine gathers on the patterns from each
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# group head.
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#
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# The option inspection-recursion-limit is used to limit the recursive calls
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# in the content inspection code. For certain payload-sig combinations, we
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# might end up taking too much time in the content inspection code.
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# If the argument specified is 0, the engine uses an internally defined
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# default limit. On not specifying a value, we use no limits on the recursion.
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detect-engine:
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- profile: medium
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- custom-values:
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toclient-src-groups: 2
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toclient-dst-groups: 2
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toclient-sp-groups: 2
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toclient-dp-groups: 3
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toserver-src-groups: 2
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toserver-dst-groups: 4
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toserver-sp-groups: 2
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toserver-dp-groups: 25
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- sgh-mpm-context: auto
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- inspection-recursion-limit: 3000
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- rule-reload: no
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# luajit-states in detect-engine. Has been '256' before, but that leads
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# to reach luajit states pool size too early. See issues #1577 and #1955.
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- luajit-states: 512
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# Suricata is multi-threaded. Here the threading can be influenced.
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threading:
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# On some cpu's/architectures it is beneficial to tie individual threads
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# to specific CPU's/CPU cores. In this case all threads are tied to CPU0,
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# and each extra CPU/core has one "detect" thread.
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#
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# On Intel Core2 and Nehalem CPU's enabling this will degrade performance.
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#
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set-cpu-affinity: no
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# Tune cpu affinity of suricata threads. Each family of threads can be bound
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# on specific CPUs.
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cpu-affinity:
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- management-cpu-set:
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cpu: [ 0 ] # include only these cpus in affinity settings
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- receive-cpu-set:
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cpu: [ 0 ] # include only these cpus in affinity settings
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#
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# By default Suricata creates one "detect" thread per available CPU/CPU core.
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# This setting allows controlling this behaviour. A ratio setting of 2 will
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# create 2 detect threads for each CPU/CPU core. So for a dual core CPU this
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# will result in 4 detect threads. If values below 1 are used, less threads
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# are created. So on a dual core CPU a setting of 0.5 results in 1 detect
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# thread being created. Regardless of the setting at a minimum 1 detect
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# thread will always be created.
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#
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detect-thread-ratio: 1
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# Select the multi pattern algorithm you want to run for scan/search the
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# in the engine. The supported algorithms are b2g, b2gc, b2gm, b3g, wumanber,
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# ac and ac-gfbs.
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#
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# The mpm you choose also decides the distribution of mpm contexts for
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# signature groups, specified by the conf - "detect-engine.sgh-mpm-context".
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# Selecting "ac" as the mpm would require "detect-engine.sgh-mpm-context"
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# to be set to "single", because of ac's memory requirements, unless the
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# ruleset is small enough to fit in one's memory, in which case one can
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# use "full" with "ac". Rest of the mpms can be run in "full" mode.
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#
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# There is also a CUDA pattern matcher (only available if Suricata was
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# compiled with --enable-cuda: b2g_cuda. Make sure to update your
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# max-pending-packets setting above as well if you use b2g_cuda.
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mpm-algo: hs
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# Select the matching algorithm you want to use for single-pattern searches.
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#
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# Supported algorithms are "bm" (Boyer-Moore) and "hs" (Hyperscan, only
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# available if Suricata has been built with Hyperscan support).
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#
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# The default of "auto" will use "hs" if available, otherwise "bm".
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spm-algo: hs
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# Defrag settings:
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defrag:
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memcap: 32mb
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hash-size: 65536
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trackers: 65535 # number of defragmented flows to follow
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max-frags: 65535 # number of fragments to keep (higher than trackers)
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prealloc: yes
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timeout: 60
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# Flow settings:
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# By default, the reserved memory (memcap) for flows is 32MB. This is the limit
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# for flow allocation inside the engine. You can change this value to allow
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# more memory usage for flows.
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# The hash-size determine the size of the hash used to identify flows inside
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# the engine, and by default the value is 65536.
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# At the startup, the engine can preallocate a number of flows, to get a better
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# performance. The number of flows preallocated is 10000 by default.
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# emergency-recovery is the percentage of flows that the engine need to
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# prune before unsetting the emergency state. The emergency state is activated
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# when the memcap limit is reached, allowing to create new flows, but
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# prunning them with the emergency timeouts (they are defined below).
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# If the memcap is reached, the engine will try to prune flows
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# with the default timeouts. If it doens't find a flow to prune, it will set
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# the emergency bit and it will try again with more agressive timeouts.
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# If that doesn't work, then it will try to kill the last time seen flows
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# not in use.
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# The memcap can be specified in kb, mb, gb. Just a number indicates it's
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# in bytes.
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flow:
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memcap: 1024mb
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hash-size: 65536
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prealloc: 15970
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emergency-recovery: 30
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prune-flows: 5
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managers: 1
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recyclers: 1
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# This option controls the use of vlan ids in the flow (and defrag)
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# hashing. Normally this should be enabled, but in some (broken)
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# setups where both sides of a flow are not tagged with the same vlan
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# tag, we can ignore the vlan id's in the flow hashing.
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vlan:
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use-for-tracking: no
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# Specific timeouts for flows. Here you can specify the timeouts that the
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# active flows will wait to transit from the current state to another, on each
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# protocol. The value of "new" determine the seconds to wait after a hanshake or
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# stream startup before the engine free the data of that flow it doesn't
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# change the state to established (usually if we don't receive more packets
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# of that flow). The value of "established" is the amount of
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# seconds that the engine will wait to free the flow if it spend that amount
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# without receiving new packets or closing the connection. "closed" is the
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# amount of time to wait after a flow is closed (usually zero).
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#
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# There's an emergency mode that will become active under attack circumstances,
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# making the engine to check flow status faster. This configuration variables
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# use the prefix "emergency-" and work similar as the normal ones.
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# Some timeouts doesn't apply to all the protocols, like "closed", for udp and
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# icmp.
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flow-timeouts:
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default:
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new: 20
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established: 30
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closed: 0
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bypassed: 0
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emergency-new: 10
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emergency-established: 15
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emergency-closed: 0
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emergency-bypassed: 0
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tcp:
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new: 20
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established: 30
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closed: 10
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bypassed: 10
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emergency-new: 10
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emergency-established: 15
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emergency-closed: 5
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udp:
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new: 20
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established: 30
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bypassed: 10
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emergency-new: 10
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emergency-established: 15
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icmp:
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new: 20
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established: 30
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emergency-new: 10
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emergency-established: 15
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# Stream engine settings. Here the TCP stream tracking and reassembly
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# engine is configured.
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#
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# stream:
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# memcap: 32mb # Can be specified in kb, mb, gb. Just a
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# # number indicates it's in bytes.
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# checksum-validation: yes # To validate the checksum of received
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# # packet. If csum validation is specified as
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# # "yes", then packet with invalid csum will not
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# # be processed by the engine stream/app layer.
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# # Warning: locally generated trafic can be
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# # generated without checksum due to hardware offload
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# # of checksum. You can control the handling of checksum
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# # on a per-interface basis via the 'checksum-checks'
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# # option
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# prealloc-sessions: 2k # 2k sessions prealloc'd per stream threadno
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# midstream: false # don't allow midstream session pickups
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# async-oneside: false # don't enable async stream handling
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# inline: no # stream inline mode
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# max-synack-queued: 5 # Max different SYN/ACKs to queue
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#
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# reassembly:
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# memcap: 64mb # Can be specified in kb, mb, gb. Just a number
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# # indicates it's in bytes.
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# depth: 1mb # Can be specified in kb, mb, gb. Just a number
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# # indicates it's in bytes.
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# toserver-chunk-size: 2560 # inspect raw stream in chunks of at least
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# # this size. Can be specified in kb, mb,
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# # gb. Just a number indicates it's in bytes.
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# # The max acceptable size is 4024 bytes.
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# toclient-chunk-size: 2560 # inspect raw stream in chunks of at least
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# # this size. Can be specified in kb, mb,
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# # gb. Just a number indicates it's in bytes.
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# # The max acceptable size is 4024 bytes.
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# randomize-chunk-size: yes # Take a random value for chunk size around the specified value.
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# # This lower the risk of some evasion technics but could lead
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# # detection change between runs. It is set to 'yes' by default.
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# randomize-chunk-range: 10 # If randomize-chunk-size is active, the value of chunk-size is
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# # a random value between (1 - randomize-chunk-range/100)*randomize-chunk-size
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# # and (1 + randomize-chunk-range/100)*randomize-chunk-size. Default value
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# # of randomize-chunk-range is 10.
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#
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# raw: yes # 'Raw' reassembly enabled or disabled.
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# # raw is for content inspection by detection
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# # engine.
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#
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# chunk-prealloc: 250 # Number of preallocated stream chunks. These
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# # are used during stream inspection (raw).
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# segments: # Settings for reassembly segment pool.
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# - size: 4 # Size of the (data)segment for a pool
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# prealloc: 256 # Number of segments to prealloc and keep
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# # in the pool.
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#
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stream:
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memcap: 1024mb
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checksum-validation: no # reject wrong csums
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midstream: true # don't allow midstream session pickups
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async-oneside: false # don't enable async stream handling
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inline: no # auto will use inline mode in IPS mode, yes or no set it statically
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prealloc-sessions: 252062
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bypass: yes
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reassembly:
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memcap: 4096mb
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depth: 100mb # reassemble 1mb into a stream
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segment-prealloc: 512
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toserver-chunk-size: 2560
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toclient-chunk-size: 2560
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randomize-chunk-size: no
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# Host table:
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#
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# Host table is used by tagging and per host thresholding subsystems.
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#
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host:
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hash-size: 4096
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prealloc: 1000
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memcap: 16777216
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# Decoder settings
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decoder:
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# Teredo decoder is known to not be completely accurate
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# as it will sometimes detect non-teredo as teredo.
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teredo:
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enabled: false
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# VXLAN decoder is assigned to up to 4 UDP ports. By default only the
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# IANA assigned port 4789 is enabled.
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vxlan:
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enabled: false
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ports: $VXLAN_PORTS # syntax: '8472, 4789'
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# Logging configuration. This is not about logging IDS alerts, but
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# IDS output about what its doing, errors, etc.
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logging:
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utc-timestamps: yes
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# The default log level, can be overridden in an output section.
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# Note that debug level logging will only be emitted if Suricata was
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# compiled with the --enable-debug configure option.
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#
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# This value is overriden by the SC_LOG_LEVEL env var.
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default-log-level: debug
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# The default output format. Optional parameter, should default to
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# something reasonable if not provided. Can be overriden in an
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# output section. You can leave this out to get the default.
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#
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# This value is overriden by the SC_LOG_FORMAT env var.
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default-log-format: "[%i] %t - (%f:%l) <%d> (%n) -- "
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# threadid date file line code thread
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# default-log-format: "%t - <%d> - "
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# A regex to filter output. Can be overridden in an output section.
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# Defaults to empty (no filter).
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#
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# This value is overriden by the SC_LOG_OP_FILTER env var.
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default-output-filter:
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# Define your logging outputs. If none are defined, or they are all
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# disabled you will get the default - console output.
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outputs:
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- console:
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enabled: yes
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- file:
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enabled: yes
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filename: suricata.msg
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append: no
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- syslog:
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enabled: no
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facility: local5
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format: ""
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pcap-file:
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checksum-checks: no
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bpf-filter: "(ip) or (vlan and ((ip) or (vlan and (ip))))"
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# Set the default rule path here to search for the files.
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# if not set, it will look at the current working dir
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default-rule-path: rules
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rule-files:
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- test.rules
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classification-file: classification.config
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reference-config-file: reference.config
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threshold-file: threshold.config
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# Holds variables that would be used by the engine.
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vars:
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# Holds the address group vars that would be passed in a Signature.
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# These would be retrieved during the Signature address parsing stage.
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address-groups:
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HOME_NET: any # ["192.168.1.1/24","172.16.1.1/24"]
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EXTERNAL_NET: any
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port-groups:
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HTTP_PORTS: any
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VXLAN_PORTS: 4789
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# Set the order of alerts bassed on actions
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# The default order is pass, drop, reject, alert
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action-order:
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- pass
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- drop
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- reject
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- alert
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# IP Reputation
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#reputation-categories-file: @e_sysconfdir@iprep/categories.txt
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#default-reputation-path: @e_sysconfdir@iprep
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#reputation-files:
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# - reputation.list
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# Host specific policies for defragmentation and TCP stream
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# reassembly. The host OS lookup is done using a radix tree, just
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# like a routing table so the most specific entry matches.
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host-os-policy:
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# Make the default policy windows.
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windows: [0.0.0.0/0]
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bsd: []
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bsd-right: []
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old-linux: []
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linux: []
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old-solaris: []
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solaris: []
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hpux10: []
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hpux11: []
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irix: []
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macos: []
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vista: []
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windows2k3: []
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# Limit for the maximum number of asn1 frames to decode (default 256)
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asn1-max-frames: 256
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# When run with the option --engine-analysis, the engine will read each of
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# the parameters below, and print reports for each of the enabled sections
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# and exit. The reports are printed to a file in the default log dir
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# given by the parameter "default-log-dir", with engine reporting
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# subsection below printing reports in its own report file.
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engine-analysis:
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# enables printing reports for fast-pattern for every rule.
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rules-fast-pattern: yes
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# enables printing reports for each rule
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rules: yes
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#recursion and match limits for PCRE where supported
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pcre:
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match-limit: 3500
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match-limit-recursion: 1500
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# Holds details on the app-layer. The protocols section details each protocol.
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# Under each protocol, the default value for detection-enabled and "
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# parsed-enabled is yes, unless specified otherwise.
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# Each protocol covers enabling/disabling parsers for all ipprotos
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# the app-layer protocol runs on. For example "dcerpc" refers to the tcp
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# version of the protocol as well as the udp version of the protocol.
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# The option "enabled" takes 3 values - "yes", "no", "detection-only".
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# "yes" enables both detection and the parser, "no" disables both, and
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# "detection-only" enables detection only(parser disabled).
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app-layer:
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protocols:
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krb5:
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enabled: yes
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ikev2:
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enabled: yes
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tls:
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enabled: yes
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detection-ports:
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dp: 443
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ja3-fingerprints: no
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encryption-handling: bypass
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dcerpc:
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enabled: yes
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ftp:
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enabled: yes
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memcap: 1000mb
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ssh:
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enabled: yes
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smtp:
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enabled: yes
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# LL: For Suricata < 5.0.0 still include ll-extraction while
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# newer versions use raw-extraction.
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ll-extraction: yes
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raw-extraction: yes
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# Suri standard SMTP extractor configuration
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mime:
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# Decode MIME messages from SMTP transactions
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# (may be resource intensive)
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# This field supercedes all others because it turns the entire
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# process on or off
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decode-mime: no
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# Decode MIME entity bodies (ie. base64, quoted-printable, etc.)
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decode-base64: yes
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decode-quoted-printable: yes
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# Maximum bytes per header data value stored in the data structure
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# (default is 2000)
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header-value-depth: 2000
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# Extract URLs and save in state data structure
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extract-urls: yes
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# Set to yes to compute the md5 of the mail body. You will then
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# be able to journalize it.
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body-md5: no
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# Configure inspected-tracker for file_data keyword
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inspected-tracker:
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content-limit: 100000
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content-inspect-min-size: 2048
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content-inspect-window: 4096
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imap:
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enabled: yes
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msn:
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enabled: yes
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smb:
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enabled: yes
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detection-ports:
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dp: 139, 445
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nfs:
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enabled: yes
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tftp:
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enabled: yes
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modbus:
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# How many unreplied Modbus requests are considered a flood.
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# If the limit is reached, app-layer-event:modbus.flooded; will match.
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#request-flood: 500
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enabled: no
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detection-ports:
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dp: 502
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# According to MODBUS Messaging on TCP/IP Implementation Guide V1.0b, it
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# is recommended to keep the TCP connection opened with a remote device
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# and not to open and close it for each MODBUS/TCP transaction. In that
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# case, it is important to set the depth of the stream reassembling as
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# unlimited (stream.reassembly.depth: 0)
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# Stream reassembly size for modbus. By default track it completely.
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stream-depth: 0
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dns:
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# memcaps. Globally and per flow/state.
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#global-memcap: 16mb
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#state-memcap: 512kb
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# How many unreplied DNS requests are considered a flood.
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# If the limit is reached, app-layer-event:dns.flooded; will match.
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#request-flood: 500
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tcp:
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enabled: yes
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detection-ports:
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dp: 53
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udp:
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enabled: yes
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detection-ports:
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dp: 53
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dnp3:
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enabled: no
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detection-ports:
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dp: 20000
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icap:
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enabled: no
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enip:
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enabled: no
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detection-ports:
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dp: 44818
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sp: 44818
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ntp:
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enabled: yes
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dhcp:
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enabled: yes
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http:
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enabled: yes
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# Abstract away the origin if it came via an HTTP proxy
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# indicating its presence via X-Forward-For:
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xff-awareness: no
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memcap: 1000mb
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###########################################################################
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# Configure libhtp.
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#
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#
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# default-config: Used when no server-config matches
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# personality: List of personalities used by default
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# request-body-limit: Limit reassembly of request body for inspection
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# by http_client_body & pcre /P option.
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# response-body-limit: Limit reassembly of response body for inspection
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# by file_data, http_server_body & pcre /Q option.
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# double-decode-path: Double decode path section of the URI
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# double-decode-query: Double decode query section of the URI
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#
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# server-config: List of server configurations to use if address matches
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# address: List of ip addresses or networks for this block
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# personalitiy: List of personalities used by this block
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# request-body-limit: Limit reassembly of request body for inspection
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# by http_client_body & pcre /P option.
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# response-body-limit: Limit reassembly of response body for inspection
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# by file_data, http_server_body & pcre /Q option.
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# double-decode-path: Double decode path section of the URI
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# double-decode-query: Double decode query section of the URI
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#
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# uri-include-all: Include all parts of the URI. By default the
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# 'scheme', username/password, hostname and port
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# are excluded. Setting this option to true adds
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# all of them to the normalized uri as inspected
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# by http_uri, urilen, pcre with /U and the other
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# keywords that inspect the normalized uri.
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# Note that this does not affect http_raw_uri.
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# Also, note that including all was the default in
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# 1.4 and 2.0beta1.
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#
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# meta-field-limit: Hard size limit for request and response size
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# limits. Applies to request line and headers,
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# response line and headers. Does not apply to
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# request or response bodies. Default is 18k.
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# If this limit is reached an event is raised.
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#
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# Currently Available Personalities:
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# Minimal
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# Generic
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# IDS (default)
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# IIS_4_0
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# IIS_5_0
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# IIS_5_1
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# IIS_6_0
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# IIS_7_0
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# IIS_7_5
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# Apache_2
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###########################################################################
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libhtp:
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default-config:
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personality: IDS
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# Can be specified in kb, mb, gb. Just a number indicates
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# it's in bytes.
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request-body-limit: 4kb
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response-body-limit: 8mb
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# inspection limits
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request-body-minimal-inspect-size: 32kb
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request-body-inspect-window: 4kb
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response-body-minimal-inspect-size: 32kb
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response-body-inspect-window: 4kb
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# Take a random value for inspection sizes around the specified value.
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# This lower the risk of some evasion technics but could lead
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# detection change between runs. It is set to 'yes' by default.
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#randomize-inspection-sizes: yes
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# If randomize-inspection-sizes is active, the value of various
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# inspection size will be choosen in the [1 - range%, 1 + range%]
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# range
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# Default value of randomize-inspection-range is 10.
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#randomize-inspection-range: 10
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# decoding
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double-decode-path: no
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double-decode-query: no
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# LL: do not decode hex characters, leave them as raw hex bytes
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path-utf8-convert-bestfit: no
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# LL: we usually adopt the default values libhtp offers
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# but in specific networks we may want to tweak these values
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# allow-truncated-output: no
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# allow-wrong-cl-extraction: no
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# decompression-layers-limit: 2
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# enable-chunk-non-http11: yes
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# force-body-extraction: no
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# force-start-http: no
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# force-strict-chunked-parse: no
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# loose-empty-line: no
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# max-res-ignored-lines: 0
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# remove-nonprintable-chars-header: no
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server-config:
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#- apache:
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# address: [192.168.1.0/24, 127.0.0.0/8, "::1"]
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# personality: Apache_2
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# # Can be specified in kb, mb, gb. Just a number indicates
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# # it's in bytes.
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# request-body-limit: 4096
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# response-body-limit: 4096
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# double-decode-path: no
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# double-decode-query: no
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#- iis7:
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# address:
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# - 192.168.0.0/24
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# - 192.168.10.0/24
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# personality: IIS_7_0
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# # Can be specified in kb, mb, gb. Just a number indicates
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# # it's in bytes.
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# request-body-limit: 4096
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# response-body-limit: 4096
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# double-decode-path: no
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# double-decode-query: no
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# Suricata core dump configuration. Limits the size of the core dump file to
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# approximately max-dump. The actual core dump size will be a multiple of the
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# page size. Core dumps that would be larger than max-dump are truncated. On
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# Linux, the actual core dump size may be a few pages larger than max-dump.
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# Setting max-dump to 0 disables core dumping.
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# Setting max-dump to 'unlimited' will give the full core dump file.
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# On 32-bit Linux, a max-dump value >= ULONG_MAX may cause the core dump size
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# to be 'unlimited'.
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coredump:
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max-dump: 0
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breakpad-enabled: no
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breakpad-dump-folder: /tmp/
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block:
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enabled: no
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umask: 002
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