suricata/suricata.yaml

%YAML 1.1
---

# Number of packets allowed to be processed simultaneously.  Default is a
# conservative 50.
#max-pending-packets: 50

# 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:

  - fast:
      enabled: yes
      filename: fast.log

  - unified-log:
      enabled: yes
      filename: unified.log

      # Limit in MB.
      #limit: 32

  - unified-alert:
      enabled: yes
      filename: unified.alert

      # Limit in MB.
      #limit: 32

  - unified2-alert:
      enabled: yes
      filename: unified2.alert

      # Limit in MB.
      #limit: 32

  - http-log:
      enabled: yes
      filename: http.log

  - alert-debug:
      enabled: yes
      filename: alert-debug.log

  - alert-prelude:
      enabled: no
      profile: suricata

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

# The detection engine build 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
      small_toclient_src_groups: 2
      small_toclient_dst_groups: 2
      small_toclient_sp_groups: 2
      small_toclient_dp_groups: 2
      small_toserver_src_groups: 2
      small_toserver_dst_groups: 2
      small_toserver_sp_groups: 2
      small_toserver_dp_groups: 8


# Select the multi pattern algorithm you want to run for scan/search the
# in the engine. The supported algorithms are b2g, b3g and wumanber.

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.

flow:
  memcap: 33554432
  hash_size: 65536
  prealloc: 10000

# 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.
  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.
  #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).
  default-output-filter:

  # Define your logging outputs.  If none are define, 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.  PR_RING will load balance packets based on flow.
  # All threads/processes that will participate need to have the same
  # clusterid.
  clusterid: 99

# 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