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# Suricata configuration file. In addition to the comments describing all
# options in this file, full documentation can be found at:
# https://redmine.openinfosecfoundation.org/projects/suricata/wiki/Suricatayaml
# 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
# Runmode custom mode the engine should run in. Please check --list-runmodes
# to get the runmode custom modes that can be used here for a particular runmode.
#runmode: auto
# Preallocated size for packet. Default is 1514 which is the classical
# size for pcap on ethernet. You should adjust this value to the highest
# packet size (MTU + hardware header) on your system.
#default-packet-size: 1514
# 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
append: yes
# 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
append: yes
#extended: yes # enable this for extended logging information
# a line based log to used with pcap file study.
# this module is dedicated to offline pcap parsing (empty output
# if used with an other kind of input). It can interoperate with
# pcap parser like wireshark via the suriwire plugin.
- pcap-info:
enabled: no
# Packet log... log packets in pcap format. 2 modes of operation: "normal"
# and "sguil".
#
# In normal mode a pcap file "filename" is created in the default-log-dir,
# or are as specified by "dir". In Sguil mode "dir" indicates the base directory.
# In this base dir the pcaps are created in th directory structure Sguil expects:
#
# $sguil_base_dir/YYYY-MM-DD/$filename.<timestamp>
#
# By default all packets are logged except:
# - TCP streams beyond stream.reassembly.depth
# - encrypted streams after the key exchange
#
- pcap-log:
enabled: no
filename: log.pcap
# Limit in MB.
limit: 1000
# If set to a value will enable ring buffer mode. Will keep Maximum of "max_files" of size "limit"
max_files: 2000
mode: normal # normal or sguil.
#dir: /nsm_data/
#ts_format: usec # sec or usec second format (default) is filename.sec usec is filename.sec.usec
use_stream_depth: no #If set to "yes" packets seen after reaching stream inspection depth are ignored. "no" logs all packets
# a full alerts log containing much information for signature writers
# or for investigating suspected false positives.
- alert-debug:
enabled: no
filename: alert-debug.log
append: yes
# 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
log_packet_content: no
log_packet_header: yes
# Stats.log contains data from various counters of the suricata engine.
# The interval field (in seconds) tells after how long output will be written
# on the log file.
- stats:
enabled: yes
filename: stats.log
interval: 8
# a line based alerts log similar to fast.log into syslog
- syslog:
enabled: no
# reported identity to syslog. If ommited the program name (usually
# suricata) will be used.
#identity: "suricata"
facility: local5
#level: Info ## possible levels: Emergency, Alert, Critical,
## Error, Warning, Notice, Info, Debug
# a line based information for dropped packet
- drop:
enabled: yes
filename: drop.log
append: yes
# When running in NFQ inline mode, it is possible to use a simulated
# non-terminal NFQUEUE verdict.
# This permit to do send all needed packet to suricata via this a rule:
# iptables -I FORWARD -m mark ! --mark $MARK/$MASK -j NFQUEUE
# And below, you can have your standard filtering ruleset. To activate
# this mode, you need to set mode to 'repeat'
# If you want packet to be sent to another queue after an ACCEPT decision
# set mode to 'route' and set next_queue value.
nfq:
# mode: accept
# repeat_mark: 1
# repeat_mask: 1
# route_queue: 2
# af-packet support
# Set threads to > 1 to use PACKET_FANOUT support
af-packet:
- interface: eth0
# Number of receive threads (>1 will enable experimental flow pinned
# runmode)
threads: 1
# Default clusterid. AF_PACKET will load balance packets based on flow.
# All threads/processes that will participate need to have the same
# clusterid.
cluster-id: 99
# Default AF_PACKET cluster type. AF_PACKET can load balance per flow or per hash.
# This is only supported for Linux kernel > 3.1
#Â possible value are:
# * cluster_round_robin: round robin load balancing
# * cluster_flow: all packets of a given flow are send to the same socket
# * cluster_cpu: all packets treated in kernel by a CPU are send to the same socket
cluster-type: cluster_round_robin
# In some fragmentation case, the hash can not be computed. If "defrag" is set
# to yes, the kernel will do the needed defragmentation before sending the packets.
defrag: yes
# recv buffer size, increase value could improve performance
# buffer-size: 32768
# Set to yes to disable promiscuous mode
# disable-promisc: no
- interface: eth1
threads: 1
cluster-id: 98
cluster-type: cluster_round_robin
defrag: yes
# buffer-size: 32768
# disable-promisc: no
defrag:
max-frags: 65535
prealloc: yes
timeout: 60
# When run with the option --engine-analysis, the engine will read each of
# the parameters below, and print reports for each of the enabled sections
# and exit. The reports are printed to a file in the default log dir
# given by the parameter "default-log-dir", with engine reporting
# subsection below printing reports in its own report file.
engine-analysis:
# enables printing reports for fast-pattern for every rule.
rules-fast-pattern: yes
#recursion and match limits for PCRE where supported
pcre:
match-limit: 3500
match-limit-recursion: 1500
# 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.
#
# "sgh mpm-context", indicates how the staging should allot mpm contexts for
# the signature groups. "single" indicates the use of a single context for
# all the signature group heads. "full" indicates a mpm_context for each
# group head. "auto" lets the engine decide the distribution of contexts
# based on the information the engine gathers on the patterns from each
# group head.
#
# The option inspection_recursion_limit is used to limit the recursive calls
# in the content inspection code. For certain payload-sig combinations, we
# might end up taking too much time in the content inspection code.
# If the argument specified is 0, the engine uses an internally defined
# default limit. On not specifying a value, we use no limits on the recursion.
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
- sgh-mpm-context: auto
- inspection-recursion-limit: 3000
# 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
# Tune cpu affinity of suricata threads. Each family of threads can be bound
#Â on specific CPUs.
cpu_affinity:
- management_cpu_set:
cpu: [ 0 ] # include only these cpus in affinity settings
- receive_cpu_set:
cpu: [ 0 ] # include only these cpus in affinity settings
- decode_cpu_set:
cpu: [ 0, 1 ]
mode: "balanced"
- stream_cpu_set:
cpu: [ "0-1" ]
- detect_cpu_set:
cpu: [ "all" ]
mode: "exclusive" # run detect threads in these cpus
# Use explicitely 3 threads and don't compute number by using
# detect_thread_ratio variable:
# threads: 3
prio:
low: [ 0 ]
medium: [ "1-2" ]
high: [ 3 ]
default: "medium"
- verdict_cpu_set:
cpu: [ 0 ]
prio:
default: "high"
- reject_cpu_set:
cpu: [ 0 ]
prio:
default: "low"
- output_cpu_set:
cpu: [ "all" ]
prio:
default: "medium"
#
# 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
# Cuda configuration.
cuda:
# The "mpm" profile. On not specifying any of these parameters, the engine's
# internal default values are used, which are same as the ones specified here.
- mpm:
# Threshold limit for no of packets buffered to the GPU. Once we hit this
# limit, we pass the buffer to the gpu.
packet_buffer_limit: 2400
# The maximum length for a packet that we would buffer to the gpu.
# Anything over this is MPM'ed on the CPU. All entries > 0 are valid.
packet_size_limit: 1500
# No of packet buffers we initialize. All entries > 0 are valid.
packet_buffers: 10
# The timeout limit for batching of packets in secs. If we don't fill the
# buffer within this timeout limit, we pass the currently filled buffer to the gpu.
# All entries > 0 are valid.
batching_timeout: 1
# Specifies whether to use page_locked memory whereever possible. Accepted values
# are "enabled" and "disabled".
page_locked: enabled
# The device to use for the mpm. Currently we don't support load balancing
# on multiple gpus. In case you have multiple devices on your system, you
# can specify the device to use, using this conf. By default we hold 0, to
# specify the first device cuda sees. To find out device_id associated with
# the card(s) on the system run "suricata --list-cuda-cards".
device_id: 0
# No of Cuda streams used for asynchronous processing. All values > 0 are valid.
# For this option you need a device with Compute Capability > 1.0 and
# page_locked enabled to have any effect.
cuda_streams: 2
# Select the multi pattern algorithm you want to run for scan/search the
# in the engine. The supported algorithms are b2g, b2gc, b2gm, b3g, wumanber,
# ac and ac-gfbs.
#
# The mpm you choose also decides the distribution of mpm contexts for
# signature groups, specified by the conf - "detect-engine.sgh_mpm_context".
# Selecting "ac" as the mpm would require "detect-engine.sgh_mpm_context"
# to be set to "single", because of ac's memory requirements, unless the
# ruleset is small enough to fit in one's memory, in which case one can
# use "full" with "ac". Rest of the mpms can be run in "full" mode.
#
# 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: ac
# The memory settings for hash size of these algorithms can vary from lowest
# (2048) - low (4096) - medium (8192) - high (16384) - higher (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:
- b2gc:
search_algo: B2gSearchBNDMq
hash_size: low
bf_size: medium
- b2gm:
search_algo: B2gSearchBNDMq
hash_size: low
bf_size: medium
- b2g:
search_algo: B2gSearchBNDMq
hash_size: low
bf_size: medium
- b3g:
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. Here the TCP stream tracking and reaasembly
# engine is configured.
#
# stream:
# memcap: 33554432 # 32mb tcp session memcap
# checksum_validation: yes # To validate the checksum of received
# # packet. If csum validation is specified as
# # "yes", then packet with invalid csum will not
# # be processed by the engine stream/app layer.
# # Warning: locally generated trafic can be
# # generated without checksum due to hardware offload
# # of checksum
# 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
# inline: no # stream inline mode
#
# reassembly:
# memcap: 67108864 # 64mb tcp reassembly memcap
# depth: 1048576 # 1 MB reassembly depth
# toserver_chunk_size: 2560 # inspect raw stream in chunks of at least
# # this size
# toclient_chunk_size: 2560 # inspect raw stream in chunks of at least
# # this size
stream:
memcap: 33554432 # 32mb
checksum_validation: yes # reject wrong csums
inline: no # no inline mode
reassembly:
memcap: 67108864 # 64mb for reassembly
depth: 1048576 # reassemble 1mb into a stream
toserver_chunk_size: 2560
toclient_chunk_size: 2560
# 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:
- interface: eth0
# Number of receive threads (>1 will enable experimental flow pinned
# runmode)
threads: 1
# 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
# Second interface
#- interface: eth1
# threads: 3
# cluster-id: 93
# cluster-type: cluster_flow
pcap:
- interface: eth0
#buffer-size: 32768
#bpf-filter: "tcp and port 25"
# 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
- decoder-events.rules #available in suricata sources under rules dir
- stream-events.rules #available in suricata sources under rules dir
classification-file: /etc/suricata/classification.config
reference-config-file: /etc/suricata/reference.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: "!$HOME_NET"
HTTP_SERVERS: "$HOME_NET"
SMTP_SERVERS: "$HOME_NET"
SQL_SERVERS: "$HOME_NET"
DNS_SERVERS: "$HOME_NET"
TELNET_SERVERS: "$HOME_NET"
AIM_SERVERS: "$EXTERNAL_NET"
# 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: []
# Limit for the maximum number of asn1 frames to decode (default 256)
asn1_max_frames: 256
###########################################################################
# Configure libhtp.
#
#
# default-config: Used when no server-config matches
# personality: List of personalities used by default
# request_body_limit: Limit reassembly of request body for inspection
# by http_client_body & pcre /P option.
#
# 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
# request_body_limit: Limit reassembly of request body for inspection
# by http_client_body & pcre /P option.
#
# 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
request_body_limit: 3072
server-config:
- apache:
address: [192.168.1.0/24, 127.0.0.0/8, "::1"]
personality: Apache_2_2
request_body_limit: 4096
- iis7:
address:
- 192.168.0.0/24
- 192.168.10.0/24
personality: IIS_7_0
request_body_limit: 4096
# Profiling settings. Only effective if Suricata has been built with the
# the --enable-profiling configure flag.
#
profiling:
# rule profiling
rules:
# Profiling can be disabled here, but it will still have a
# performance impact if compiled in.
enabled: yes
filename: rule_perf.log
append: yes
# Sort options: ticks, avgticks, checks, matches, maxticks
sort: avgticks
# Limit the number of items printed at exit.
limit: 100
# packet profiling
packets:
# Profiling can be disabled here, but it will still have a
# performance impact if compiled in.
enabled: yes
filename: packet_stats.log
append: yes
# per packet csv output
csv:
# Output can be disabled here, but it will still have a
# performance impact if compiled in.
enabled: no
filename: packet_stats.csv