suricata/suricata.yaml

%YAML 1.1
---

# Number of packets allowed to be processed simultaneously.  Default is a
# conservative 50. a higher number will make sure CPU's/CPU cores will be
# more easily kept busy, but will negatively impact caching.
#
# If you are using the CUDA pattern matcher (b2g_cuda below), different rules
# apply. In that case try something like 4000 or more. This is because the CUDA
# pattern matcher scans many packets in parallel.
#max-pending-packets: 50

# Set the order of alerts bassed on actions
# The default order is pass, drop, reject, alert
action-order:
  - pass
  - drop
  - reject
  - alert


# The default logging directory.  Any log or output file will be
# placed here if its not specified with a full path name.  This can be
# overridden with the -l command line parameter.
default-log-dir: /var/log/suricata

# Configure the type of alert (and other) logging you would like.
outputs:

  # a line based alerts log similar to Snort's fast.log
  - fast:
      enabled: yes
      filename: fast.log

  # log output for use with Barnyard
  - unified-log:
      enabled: no
      filename: unified.log

      # Limit in MB.
      #limit: 32

  # alert output for use with Barnyard
  - unified-alert:
      enabled: no
      filename: unified.alert

      # Limit in MB.
      #limit: 32

  # alert output for use with Barnyard2
  - unified2-alert:
      enabled: yes
      filename: unified2.alert

      # Limit in MB.
      #limit: 32

  # a line based log of HTTP requests (no alerts)
  - http-log:
      enabled: yes
      filename: http.log

  # a full alerts log containing much information for signature writers
  # or for investigating suspected false positives.
  - alert-debug:
      enabled: no
      filename: alert-debug.log

  # alert output to prelude (http://www.prelude-technologies.com/) only
  # available if Suricata has been compiled with --enable-prelude
  - alert-prelude:
      enabled: no
      profile: suricata

defrag:
  max-frags: 65535
  prealloc: yes
  timeout: 60

# You can specify a threshold config file by setting "threshold-file"
# to the path of the threshold config file:
# threshold-file: /etc/suricata/threshold.config

# The detection engine builds internal groups of signatures. The engine
# allow us to specify the profile to use for them, to manage memory on an
# efficient way keeping a good performance. For the profile keyword you
# can use the words "low", "medium", "high" or "custom". If you use custom
# make sure to define the values at "- custom-values" as your convenience.
# Usually you would prefer medium/high/low
detect-engine:
  - profile: medium
  - custom-values:
      toclient_src_groups: 2
      toclient_dst_groups: 2
      toclient_sp_groups: 2
      toclient_dp_groups: 3
      toserver_src_groups: 2
      toserver_dst_groups: 4
      toserver_sp_groups: 2
      toserver_dp_groups: 25

# Suricata is multi-threaded. Here the threading can be influenced.
threading:
  # On some cpu's/architectures it is beneficial to tie individual threads
  # to specific CPU's/CPU cores. In this case all threads are tied to CPU0,
  # and each extra CPU/core has one "detect" thread.
  #
  # On Intel Core2 and Nehalem CPU's enabling this will degrade performance.
  #
  set_cpu_affinity: no
  #
  # By default Suricata creates one "detect" thread per available CPU/CPU core.
  # This setting allows controlling this behaviour. A ratio setting of 2 will
  # create 2 detect threads for each CPU/CPU core. So for a dual core CPU this
  # will result in 4 detect threads. If values below 1 are used, less threads
  # are created. So on a dual core CPU a setting of 0.5 results in 1 detect
  # thread being created. Regardless of the setting at a minimum 1 detect
  # thread will always be created.
  #
  detect_thread_ratio: 1.5

# Select the multi pattern algorithm you want to run for scan/search the
# in the engine. The supported algorithms are b2g, b3g and wumanber.
#
# There is also a CUDA pattern matcher (only available if Suricata was
# compiled with --enable-cuda: b2g_cuda. Make sure to update your
# max-pending-packets setting above as well if you use b2g_cuda.

mpm-algo: b2g

# The memory settings for hash size of these algorithms can vary from lowest
# (2048) - low (4096) - medium (8192) - high (16384) - highest (32768) - max
# (65536). The bloomfilter sizes of these algorithms can vary from low (512) -
# medium (1024) - high (2048).
#
# For B2g/B3g algorithms, there is a support for two different scan/search
# algorithms. For B2g the scan algorithms are B2gScan & B2gScanBNDMq, and
# search algorithms are B2gSearch & B2gSearchBNDMq. For B3g scan algorithms
# are B3gScan & B3gScanBNDMq, and search algorithms are B3gSearch &
# B3gSearchBNDMq.
#
# For B2g the different scan/search algorithms and, hash and bloom
# filter size settings. For B3g the different scan/search algorithms and, hash
# and bloom filter size settings. For wumanber the hash and bloom filter size
# settings.

pattern-matcher:
  - b2g:
      scan_algo: B2gScanBNDMq
      search_algo: B2gSearchBNDMq
      hash_size: low
      bf_size: medium
  - b3g:
      scan_algo: B3gScanBNDMq
      search_algo: B3gSearchBNDMq
      hash_size: low
      bf_size: medium
  - wumanber:
      hash_size: low
      bf_size: medium

# Flow settings:
# By default, the reserved memory (memcap) for flows is 32MB. This is the limit
# for flow allocation inside the engine. You can change this value to allow
# more memory usage for flows.
# The hash_size determine the size of the hash used to identify flows inside
# the engine, and by default the value is 65536.
# At the startup, the engine can preallocate a number of flows, to get a better
# performance. The number of flows preallocated is 10000 by default.
# emergency_recovery is the percentage of flows that the engine need to
# prune before unsetting the emergency state. The emergency state is activated
# when the memcap limit is reached, allowing to create new flows, but
# prunning them with the emergency timeouts (they are defined below).
# If the memcap is reached, the engine will try to prune prune_flows
# with the default timeouts. If it doens't find a flow to prune, it will set
# the emergency bit and it will try again with more agressive timeouts.
# If that doesn't work, then it will try to kill the last time seen flows
# not in use.

flow:
  memcap: 33554432
  hash_size: 65536
  prealloc: 10000
  emergency_recovery: 30
  prune_flows: 5

# Specific timeouts for flows. Here you can specify the timeouts that the
# active flows will wait to transit from the current state to another, on each
# protocol. The value of "new" determine the seconds to wait after a hanshake or
# stream startup before the engine free the data of that flow it doesn't
# change the state to established (usually if we don't receive more packets
# of that flow). The value of "established" is the amount of
# seconds that the engine will wait to free the flow if it spend that amount
# without receiving new packets or closing the connection. "closed" is the
# amount of time to wait after a flow is closed (usually zero).
#
# There's an emergency mode that will become active under attack circumstances,
# making the engine to check flow status faster. This configuration variables
# use the prefix "emergency_" and work similar as the normal ones.
# Some timeouts doesn't apply to all the protocols, like "closed", for udp and
# icmp.

flow-timeouts:

  default:
    new: 30
    established: 300
    closed: 0
    emergency_new: 10
    emergency_established: 100
    emergency_closed: 0
  tcp:
    new: 60
    established: 3600
    closed: 120
    emergency_new: 10
    emergency_established: 300
    emergency_closed: 20
  udp:
    new: 30
    established: 300
    emergency_new: 10
    emergency_established: 100
  icmp:
    new: 30
    established: 300
    emergency_new: 10
    emergency_established: 100

# Stream engine settings.
# stream:
#   memcap: 67108864 # 64mb memcap
#   max_sessions: 262144 # 256k concurrent sessions
#   prealloc_sessions: 32768 # 32k sessions prealloc'd
#   midstream: false # don't allow midstream session pickups
#   async_oneside: false # don't enable async stream handling
stream:

# Logging configuration.  This is not about logging IDS alerts, but
# IDS output about what its doing, errors, etc.
logging:

  # The default log level, can be overridden in an output section.
  # Note that debug level logging will only be emitted if Suricata was
  # compiled with the --enable-debug configure option.
  #
  # This value is overriden by the SC_LOG_LEVEL env var.
  default-log-level: info

  # The default output format.  Optional parameter, should default to
  # something reasonable if not provided.  Can be overriden in an
  # output section.  You can leave this out to get the default.
  #
  # This value is overriden by the SC_LOG_FORMAT env var.
  #default-log-format: "[%i] %t - (%f:%l) <%d> (%n) -- "

  # A regex to filter output.  Can be overridden in an output section.
  # Defaults to empty (no filter).
  #
  # This value is overriden by the SC_LOG_OP_FILTER env var.
  default-output-filter:

  # Define your logging outputs.  If none are defined, or they are all
  # disabled you will get the default - console output.
  outputs:
  - console:
      enabled: yes
  - file:
      enabled: no
      filename: /var/log/suricata.log
  - syslog:
      enabled: no
      facility: local5
      format: "[%i] <%d> -- "

# PF_RING configuration. for use with native PF_RING support
# for more info see http://www.ntop.org/PF_RING.html
pfring:

  # Default interface we will listen on.
  interface: eth0

  # Default clusterid.  PF_RING will load balance packets based on flow.
  # All threads/processes that will participate need to have the same
  # clusterid.
  cluster-id: 99

  # Default PF_RING cluster type. PF_RING can load balance per flow or per hash.
  # This is only supported in versions of PF_RING > 4.1.1.
  cluster-type: cluster_round_robin

# For FreeBSD ipfw(8) divert(4) support.
# Please make sure you have ipfw_load="YES" and ipdivert_load="YES"
# in /etc/loader.conf or kldload'ing the appropriate kernel modules.
# Additionally, you need to have an ipfw rule for the engine to see
# the packets from ipfw.  For Example:
#
#   ipfw add 100 divert 8000 ip from any to any
#
# The 8000 above should be the same number you passed on the command
# line, i.e. -d 8000
#
ipfw:

  # Reinject packets at the specified ipfw rule number.  This config
  # option is the ipfw rule number AT WHICH rule processing continues
  # in the ipfw processing system after the engine has finished
  # inspecting the packet for acceptance.  If no rule number is specified,
  # accepted packets are reinjected at the divert rule which they entered
  # and IPFW rule processing continues.  No check is done to verify
  # this will rule makes sense so care must be taken to avoid loops in ipfw.
  #
  ## The following example tells the engine to reinject packets
  # back into the ipfw firewall AT rule number 5500:
  #
  # ipfw-reinjection-rule-number: 5500

# Set the default rule path here to search for the files.
# if not set, it will look at the current working dir
default-rule-path: /etc/suricata/rules/
rule-files:
 - attack-responses.rules
 - backdoor.rules
 - bad-traffic.rules
 - chat.rules
 - ddos.rules
 - deleted.rules
 - dns.rules
 - dos.rules
 - experimental.rules
 - exploit.rules
 - finger.rules
 - ftp.rules
 - icmp-info.rules
 - icmp.rules
 - imap.rules
 - info.rules
 - local.rules
 - misc.rules
 - multimedia.rules
 - mysql.rules
 - netbios.rules
 - nntp.rules
 - oracle.rules
 - other-ids.rules
 - p2p.rules
 - policy.rules
 - pop2.rules
 - pop3.rules
 - porn.rules
 - rpc.rules
 - rservices.rules
 - scada.rules
 - scan.rules
 - shellcode.rules
 - smtp.rules
 - snmp.rules
 - specific-threats.rules
 - spyware-put.rules
 - sql.rules
 - telnet.rules
 - tftp.rules
 - virus.rules
 - voip.rules
 - web-activex.rules
 - web-attacks.rules
 - web-cgi.rules
 - web-client.rules
 - web-coldfusion.rules
 - web-frontpage.rules
 - web-iis.rules
 - web-misc.rules
 - web-php.rules
 - x11.rules
 - emerging-attack_response.rules
 - emerging-dos.rules
 - emerging-exploit.rules
 - emerging-game.rules
 - emerging-inappropriate.rules
 - emerging-malware.rules
 - emerging-p2p.rules
 - emerging-policy.rules
 - emerging-scan.rules
 - emerging-virus.rules
 - emerging-voip.rules
 - emerging-web.rules
 - emerging-web_client.rules
 - emerging-web_server.rules
 - emerging-web_specific_apps.rules
 - emerging-user_agents.rules
 - emerging-current_events.rules

classification-file: /etc/suricata/classification.config

# Holds variables that would be used by the engine.
vars:

  # Holds the address group vars that would be passed in a Signature.
  # These would be retrieved during the Signature address parsing stage.
  address-groups:

    HOME_NET: "[192.168.0.0/16,10.0.0.0/8,172.16.0.0/12]"

    EXTERNAL_NET: any

    HTTP_SERVERS: "$HOME_NET"

    SMTP_SERVERS: "$HOME_NET"

    SQL_SERVERS: "$HOME_NET"

    DNS_SERVERS: "$HOME_NET"

    TELNET_SERVERS: "$HOME_NET"

    AIM_SERVERS: any

  # Holds the port group vars that would be passed in a Signature.
  # These would be retrieved during the Signature port parsing stage.
  port-groups:

    HTTP_PORTS: "80"

    SHELLCODE_PORTS: "!80"

    ORACLE_PORTS: 1521

    SSH_PORTS: 22

# Host specific policies for defragmentation and TCP stream
# reassembly.  The host OS lookup is done using a radix tree, just
# like a routing table so the most specific entry matches.
host-os-policy:
  # Make the default policy windows.
  windows: [0.0.0.0/0]
  bsd: []
  bsd_right: []
  old_linux: []
  linux: [10.0.0.0/8, 192.168.1.100, "8762:2352:6241:7245:E000:0000:0000:0000"]
  old_solaris: []
  solaris: ["::1"]
  hpux10: []
  hpux11: []
  irix: []
  macos: []
  vista: []
  windows2k3: []

###########################################################################
# Configure libhtp.
#
#
# default-config:  Used when no server-config matches
#   personality:   List of personalities used by default
#
# server-config:   List of server configurations to use if address matches
#   address:       List of ip addresses or networks for this block
#   personalitiy:  List of personalities used by this block
#
# Currently Available Personalities:
#   Minimal
#   Generic
#   IDS (default)
#   IIS_4_0
#   IIS_5_0
#   IIS_5_1
#   IIS_6_0
#   IIS_7_0
#   IIS_7_5
#   Apache
#   Apache_2_2
###########################################################################
libhtp:

   default-config:
     personality: IDS

   server-config:

     - apache:
         address: [192.168.1.0/24, 127.0.0.0/8, "::1"]
         personality: Apache_2_2

     - iis7:
         address:
           - 192.168.0.0/24
           - 192.168.10.0/24
         personality: IIS_7_0

# rule profiling settings. Only effective if Suricata has been built with the
# the --enable-profiling configure flag.
#
profiling:

  rules:

    # Profiling can be disabled here, but it will still have a
    # performance impact if compiled in.
    enabled: yes

    # Sort options: ticks, avgticks, checks, matches
    sort: avgticks

    # Limit the number of items printed at exit.
    limit: 100