[Oisf-users] packet drop cca. 25%
Michal Šutta
michal.sutta at gmail.com
Thu Apr 3 13:06:46 UTC 2014
Hello,
could you please help with the configuration of suricata.yaml for Suricata
2.0. I am using the default rules from emergingthreats. I made some tweaks
in the configuration file but still i have about 25% packet drop
(capture.kernel_drops) at 340 Mbps network bandwidth.
This is the configuration file
%YAML 1.1
---
# 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 1024. A higher number will make sure CPU's/CPU cores will be
# more easily kept busy, but may negatively impact caching.
#
# If you are using the CUDA pattern matcher (mpm-algo: ac-cuda), different
rules
# apply. In that case try something like 60000 or more. This is because the
CUDA
# pattern matcher buffers and scans as many packets as possible in parallel.
max-pending-packets: 65000
# Runmode the engine should use. Please check --list-runmodes to get the
available
# runmodes for each packet acquisition method. Defaults to "autofp" (auto
flow pinned
# load balancing).
runmode: autofp
# Specifies the kind of flow load balancer used by the flow pinned autofp
mode.
#
# Supported schedulers are:
#
# round-robin - Flows assigned to threads in a round robin fashion.
# active-packets - Flows assigned to threads that have the lowest number
of
# unprocessed packets (default).
# hash - Flow alloted usihng the address hash. More of a random
# technique. Was the default in Suricata 1.2.1 and
older.
#
#autofp-scheduler: active-packets
# If suricata box is a router for the sniffed networks, set it to 'router'.
If
# it is a pure sniffing setup, set it to 'sniffer-only'.
# If set to auto, the variable is internally switch to 'router' in IPS mode
# and 'sniffer-only' in IDS mode.
# This feature is currently only used by the reject* keywords.
host-mode: auto
# Run suricata as user and group.
#run-as:
# user: suri
# group: suri
# Default pid file.
# Will use this file if no --pidfile in command options.
#pid-file: /var/run/suricata.pid
# Daemon working directory
# Suricata will change directory to this one if provided
# Default: "/"
#daemon-directory: "/"
# 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
# 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/
# Unix command socket can be used to pass commands to suricata.
# An external tool can then connect to get information from suricata
# or trigger some modifications of the engine. Set enabled to yes
# to activate the feature. You can use the filename variable to set
# the file name of the socket.
unix-command:
enabled: no
#filename: custom.socket
# 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
#filetype: regular # 'regular', 'unix_stream' or 'unix_dgram'
# Extensible Event Format (nicknamed EVE) event log in JSON format
- eve-log:
enabled: no
type: file #file|syslog|unix_dgram|unix_stream
filename: eve.json
# the following are valid when type: syslog above
#identity: "suricata"
#facility: local5
#level: Info ## possible levels: Emergency, Alert, Critical,
## Error, Warning, Notice, Info, Debug
types:
- alert
- http:
extended: yes # enable this for extended logging information
- dns
- tls:
extended: yes # enable this for extended logging information
- files:
force-magic: no # force logging magic on all logged files
force-md5: no # force logging of md5 checksums
#- drop
- ssh
# alert output for use with Barnyard2
- unified2-alert:
enabled: no
filename: unified2.alert
# File size limit. Can be specified in kb, mb, gb. Just a number
# is parsed as bytes.
#limit: 32mb
# Sensor ID field of unified2 alerts.
#sensor-id: 0
# HTTP X-Forwarded-For support by adding the unified2 extra header
that
# will contain the actual client IP address or by overwriting the
source
# IP address (helpful when inspecting traffic that is being reversed
# proxied).
xff:
enabled: no
# Two operation modes are available, "extra-data" and "overwrite".
Note
# that in the "overwrite" mode, if the reported IP address in the
HTTP
# X-Forwarded-For header is of a different version of the packet
# received, it will fall-back to "extra-data" mode.
mode: extra-data
# Header name were the actual IP address will be reported, if more
than
# one IP address is present, the last IP address will be the one
taken
# into consideration.
header: X-Forwarded-For
# a line based log of HTTP requests (no alerts)
- http-log:
enabled: no
filename: http.log
append: yes
#extended: yes # enable this for extended logging information
#custom: yes # enabled the custom logging format (defined by
customformat)
#customformat: "%{%D-%H:%M:%S}t.%z %{X-Forwarded-For}i %H %m %h %u %s
%B %a:%p -> %A:%P"
#filetype: regular # 'regular', 'unix_stream' or 'unix_dgram'
# a line based log of TLS handshake parameters (no alerts)
- tls-log:
enabled: no # Log TLS connections.
filename: tls.log # File to store TLS logs.
append: yes
#filetype: regular # 'regular', 'unix_stream' or 'unix_dgram'
#extended: yes # Log extended information like fingerprint
certs-log-dir: certs # directory to store the certificates files
# a line based log of DNS requests and/or replies (no alerts)
- dns-log:
enabled: no
filename: dns.log
append: yes
#filetype: regular # 'regular', 'unix_stream' or 'unix_dgram'
# a line based log to used with pcap file study.
# this module is dedicated to offline pcap parsing (empty output
# if used with another 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
# File size limit. Can be specified in kb, mb, gb. Just a number
# is parsed as bytes.
limit: 1000mb
# 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.
#sguil-base-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
#filetype: regular # 'regular', 'unix_stream' or 'unix_dgram'
# 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: 10
# 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 packets in IPS mode
- drop:
enabled: no
filename: drop.log
append: yes
#filetype: regular # 'regular', 'unix_stream' or 'unix_dgram'
# output module to store extracted files to disk
#
# The files are stored to the log-dir in a format "file.<id>" where <id>
is
# an incrementing number starting at 1. For each file "file.<id>" a meta
# file "file.<id>.meta" is created.
#
# File extraction depends on a lot of things to be fully done:
# - stream reassembly depth. For optimal results, set this to 0
(unlimited)
# - http request / response body sizes. Again set to 0 for optimal
results.
# - rules that contain the "filestore" keyword.
- file-store:
enabled: no # set to yes to enable
log-dir: files # directory to store the files
force-magic: no # force logging magic on all stored files
force-md5: no # force logging of md5 checksums
#waldo: file.waldo # waldo file to store the file_id across runs
# output module to log files tracked in a easily parsable json format
- file-log:
enabled: no
filename: files-json.log
append: yes
#filetype: regular # 'regular', 'unix_stream' or 'unix_dgram'
force-magic: no # force logging magic on all logged files
force-md5: no # force logging of md5 checksums
# Magic file. The extension .mgc is added to the value here.
#magic-file: /usr/share/file/magic
magic-file: /usr/share/file/magic
# 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.
# On linux >= 3.1, you can set batchcount to a value > 1 to improve
performance
# by processing several packets before sending a verdict (worker runmode
only).
# On linux >= 3.6, you can set the fail-open option to yes to have the
kernel
# accept the packet if suricata is not able to keep pace.
nfq:
# mode: accept
# repeat-mark: 1
# repeat-mask: 1
# route-queue: 2
# batchcount: 20
# fail-open: yes
# 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
# 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_flow
# 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
# To use the ring feature of AF_PACKET, set 'use-mmap' to yes
use-mmap: yes
# Ring size will be computed with respect to max_pending_packets and
number
# of threads. You can set manually the ring size in number of packets
by setting
# the following value. If you are using flow cluster-type and have
really network
# intensive single-flow you could want to set the ring-size
independantly of the number
# of threads:
#ring-size: 2048
# On busy system, this could help to set it to yes to recover from a
packet drop
# phase. This will result in some packets (at max a ring flush) being
non treated.
#use-emergency-flush: yes
# recv buffer size, increase value could improve performance
# buffer-size: 32768
# Set to yes to disable promiscuous mode
# disable-promisc: no
# Choose checksum verification mode for the interface. At the moment
# of the capture, some packets may be with an invalid checksum due to
# offloading to the network card of the checksum computation.
# Possible values are:
# - kernel: use indication sent by kernel for each packet (default)
# - yes: checksum validation is forced
# - no: checksum validation is disabled
# - auto: suricata uses a statistical approach to detect when
# checksum off-loading is used.
# Warning: 'checksum-validation' must be set to yes to have any
validation
#checksum-checks: kernel
# BPF filter to apply to this interface. The pcap filter syntax apply
here.
#bpf-filter: port 80 or udp
# You can use the following variables to activate AF_PACKET tap od IPS
mode.
# If copy-mode is set to ips or tap, the traffic coming to the current
# interface will be copied to the copy-iface interface. If 'tap' is
set, the
# copy is complete. If 'ips' is set, the packet matching a 'drop' action
# will not be copied.
#copy-mode: ips
#copy-iface: eth1
- interface: eth1
threads: 1
cluster-id: 98
cluster-type: cluster_flow
defrag: yes
# buffer-size: 32768
# disable-promisc: no
# Put default values here
- interface: default
#threads: 2
#use-mmap: yes
legacy:
uricontent: enabled
# 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
# When rule-reload is enabled, sending a USR2 signal to the Suricata
process
# will trigger a live rule reload. Experimental feature, use with care.
#- rule-reload: true
# If set to yes, the loading of signatures will be made after the capture
# is started. This will limit the downtime in IPS mode.
#- delayed-detect: yes
# 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
# 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: 0.5
# 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
in
# in the default conf file.
mpm:
# The minimum length required to buffer data to the gpu.
# Anything below this is MPM'ed on the CPU.
# Can be specified in kb, mb, gb. Just a number indicates it's in
bytes.
# A value of 0 indicates there's no limit.
data-buffer-size-min-limit: 0
# The maximum length for data that we would buffer to the gpu.
# Anything over this is MPM'ed on the CPU.
# Can be specified in kb, mb, gb. Just a number indicates it's in
bytes.
data-buffer-size-max-limit: 1500
# The ring buffer size used by the CudaBuffer API to buffer data.
cudabuffer-buffer-size: 500mb
# The max chunk size that can be sent to the gpu in a single go.
gpu-transfer-size: 95mb
# The timeout limit for batching of packets in microseconds.
batching-timeout: 400
# 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: 1
# 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.
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
# mssax-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
# Defrag settings:
defrag:
memcap: 2gb
hash-size: 65536
trackers: 65535 # number of defragmented flows to follow
max-frags: 65535 # number of fragments to keep (higher than trackers)
prealloc: yes
timeout: 60
# Enable defrag per host settings
# host-config:
#
# - dmz:
# timeout: 30
# address: [192.168.1.0/24, 127.0.0.0/8, 1.1.1.0/24, 2.2.2.0/24,
"1.1.1.1", "2.2.2.2", "::1"]
#
# - lan:
# timeout: 45
# address:
# - 192.168.0.0/24
# - 192.168.10.0/24
# - 172.16.14.0/24
# 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 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.
# The memcap can be specified in kb, mb, gb. Just a number indicates it's
# in bytes.
flow:
memcap: 2gb
hash-size: 65536
prealloc: 10000
emergency-recovery: 30
# This option controls the use of vlan ids in the flow (and defrag)
# hashing. Normally this should be enabled, but in some (broken)
# setups where both sides of a flow are not tagged with the same vlan
# tag, we can ignore the vlan id's in the flow hashing.
vlan:
use-for-tracking: true
# 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 reassembly
# engine is configured.
#
# stream:
# memcap: 32mb # Can be specified in kb, mb, gb. Just a
# # number indicates it's in bytes.
# 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. You can control the handling
of checksum
# # on a per-interface basis via the
'checksum-checks'
# # option
# prealloc-sessions: 2k # 2k sessions prealloc'd per stream thread
# midstream: false # don't allow midstream session pickups
# async-oneside: false # don't enable async stream handling
# inline: no # stream inline mode
# max-synack-queued: 5 # Max different SYN/ACKs to queue
#
# reassembly:
# memcap: 64mb # Can be specified in kb, mb, gb. Just a
number
# # indicates it's in bytes.
# depth: 1mb # Can be specified in kb, mb, gb. Just a
number
# # indicates it's in bytes.
# toserver-chunk-size: 2560 # inspect raw stream in chunks of at least
# # this size. Can be specified in kb, mb,
# # gb. Just a number indicates it's in
bytes.
# # The max acceptable size is 4024 bytes.
# toclient-chunk-size: 2560 # inspect raw stream in chunks of at least
# # this size. Can be specified in kb, mb,
# # gb. Just a number indicates it's in
bytes.
# # The max acceptable size is 4024 bytes.
# randomize-chunk-size: yes # Take a random value for chunk size around
the specified value.
# # This lower the risk of some evasion
technics but could lead
# # detection change between runs. It is set
to 'yes' by default.
# randomize-chunk-range: 10 # If randomize-chunk-size is active, the
value of chunk-size is
# # a random value between (1 -
randomize-chunk-range/100)*randomize-chunk-size
# # and (1 +
randomize-chunk-range/100)*randomize-chunk-size. Default value
# # of randomize-chunk-range is 10.
#
# raw: yes # 'Raw' reassembly enabled or disabled.
# # raw is for content inspection by detection
# # engine.
#
# chunk-prealloc: 250 # Number of preallocated stream chunks.
These
# # are used during stream inspection (raw).
# segments: # Settings for reassembly segment pool.
# - size: 4 # Size of the (data)segment for a pool
# prealloc: 256 # Number of segments to prealloc and keep
# # in the pool.
#
stream:
memcap: 2gb
checksum-validation: yes # reject wrong csums
inline: auto # auto will use inline mode in IPS mode,
yes or no set it statically
reassembly:
memcap: 2gb
depth: 5mb # reassemble 1mb into a stream
toserver-chunk-size: 2560
toclient-chunk-size: 2560
randomize-chunk-size: yes
#randomize-chunk-range: 10
#raw: yes
#chunk-prealloc: 250
#segments:
# - size: 4
# prealloc: 256
# - size: 16
# prealloc: 512
# - size: 112
# prealloc: 512
# - size: 248
# prealloc: 512
# - size: 512
# prealloc: 512
# - size: 768
# prealloc: 1024
# - size: 1448
# prealloc: 1024
# - size: 65535
# prealloc: 128
# Host table:
#
# Host table is used by tagging and per host thresholding subsystems.
#
host:
hash-size: 4096
prealloc: 1000
memcap: 16777216
# 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: notice
# 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> -- "
# Tilera mpipe configuration. for use on Tilera TILE-Gx.
mpipe:
# Load balancing modes: "static", "dynamic", "sticky", or "round-robin".
load-balance: dynamic
# Number of Packets in each ingress packet queue. Must be 128, 512, 2028
or 65536
iqueue-packets: 2048
# List of interfaces we will listen on.
inputs:
- interface: xgbe2
- interface: xgbe3
- interface: xgbe4
# Relative weight of memory for packets of each mPipe buffer size.
stack:
size128: 0
size256: 9
size512: 0
size1024: 0
size1664: 7
size4096: 0
size10386: 0
size16384: 0
# 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 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_flow
# bpf filter for this interface
#bpf-filter: tcp
# Choose checksum verification mode for the interface. At the moment
# of the capture, some packets may be with an invalid checksum due to
# offloading to the network card of the checksum computation.
# Possible values are:
# - rxonly: only compute checksum for packets received by network card.
# - yes: checksum validation is forced
# - no: checksum validation is disabled
# - auto: suricata uses a statistical approach to detect when
# checksum off-loading is used. (default)
# Warning: 'checksum-validation' must be set to yes to have any
validation
#checksum-checks: auto
# Second interface
#- interface: eth1
# threads: 3
# cluster-id: 93
# cluster-type: cluster_flow
# Put default values here
- interface: default
#threads: 2
pcap:
- interface: eth0
# On Linux, pcap will try to use mmaped capture and will use buffer-size
# as total of memory used by the ring. So set this to something bigger
# than 1% of your bandwidth.
#buffer-size: 16777216
#bpf-filter: "tcp and port 25"
# Choose checksum verification mode for the interface. At the moment
# of the capture, some packets may be with an invalid checksum due to
# offloading to the network card of the checksum computation.
# Possible values are:
# - yes: checksum validation is forced
# - no: checksum validation is disabled
# - auto: suricata uses a statistical approach to detect when
# checksum off-loading is used. (default)
# Warning: 'checksum-validation' must be set to yes to have any
validation
#checksum-checks: auto
# With some accelerator cards using a modified libpcap (like myricom),
you
# may want to have the same number of capture threads as the number of
capture
# rings. In this case, set up the threads variable to N to start N
threads
# listening on the same interface.
#threads: 16
# set to no to disable promiscuous mode:
#promisc: no
# set snaplen, if not set it defaults to MTU if MTU can be known
# via ioctl call and to full capture if not.
#snaplen: 1518
# Put default values here
- interface: default
#checksum-checks: auto
pcap-file:
# Possible values are:
# - yes: checksum validation is forced
# - no: checksum validation is disabled
# - auto: suricata uses a statistical approach to detect when
# checksum off-loading is used. (default)
# Warning: 'checksum-validation' must be set to yes to have checksum
tested
checksum-checks: auto
# 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:
- snort.rules
# - botcc.portgrouped.rules
# - botcc.rules
# - ciarmy.rules
# - compromised.rules
# - decoder-events.rules
# - drop.rules
# - dshield.rules
# - emerging-activex.rules
# - emerging-attack_response.rules
# - emerging-chat.rules
# - emerging-current_events.rules
# #- emerging-deleted.rules
# - emerging-dns.rules
# - emerging-dos.rules
# - emerging-exploit.rules
# - emerging-ftp.rules
# - emerging-games.rules
# - emerging-icmp_info.rules
# - emerging-icmp.rules
# - emerging-imap.rules
# - emerging-inappropriate.rules
# - emerging-info.rules
# - emerging-malware.rules
# - emerging-misc.rules
# - emerging-mobile_malware.rules
# - emerging-netbios.rules
# - emerging-p2p.rules
# - emerging-policy.rules
# - emerging-pop3.rules
# - emerging-rpc.rules
# - emerging-scada.rules
# - emerging-scan.rules
# - emerging-shellcode.rules
# - emerging-smtp.rules
# - emerging-snmp.rules
# - emerging-sql.rules
# - emerging-telnet.rules
# - emerging-tftp.rules
# - emerging-trojan.rules
# - emerging-user_agents.rules
# - emerging-voip.rules
# - emerging-web_client.rules
# - emerging-web_server.rules
# - emerging-web_specific_apps.rules
# - emerging-worm.rules
# - files.rules
# - http-events.rules
# - rbn-malvertisers.rules
# - rbn.rules
# - smtp-events.rules
# - stream-events.rules
# - tls-events.rules
# - tor.rules
# decoder-events.rules # available in suricata sources under rules dir
# stream-events.rules # available in suricata sources under rules dir
# http-events.rules # available in suricata sources under rules dir
# smtp-events.rules # available in suricata sources under rules dir
# dns-events.rules # available in suricata sources under rules dir
#- tls-events.rules # available in suricata sources under rules dir
classification-file: /etc/suricata/rules/classification.config
reference-config-file: /etc/suricata/rules/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: "[192.168.1.3/32]"
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: "$EXTERNAL_NET"
DNP3_SERVER: "$HOME_NET"
DNP3_CLIENT: "$HOME_NET"
MODBUS_CLIENT: "$HOME_NET"
MODBUS_SERVER: "$HOME_NET"
ENIP_CLIENT: "$HOME_NET"
ENIP_SERVER: "$HOME_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
DNP3_PORTS: 20000
# Set the order of alerts bassed on actions
# The default order is pass, drop, reject, alert
action-order:
- pass
- drop
- reject
- alert
# IP Reputation
#reputation-categories-file: /usr/local/etc/suricata/iprep/categories.txt
#default-reputation-path: /usr/local/etc/suricata/iprep
#reputation-files:
# - reputation.list
# 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: []
bsd: []
bsd-right: []
old-linux: []
linux: [192.168.1.0/24, 192.168.1.0/24,
"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
# 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
# enables printing reports for each rule
rules: yes
#recursion and match limits for PCRE where supported
pcre:
match-limit: 3500
match-limit-recursion: 1500
# Holds details on the app-layer. The protocols section details each
protocol.
# Under each protocol, the default value for detection-enabled and "
# parsed-enabled is yes, unless specified otherwise.
# Each protocol covers enabling/disabling parsers for all ipprotos
# the app-layer protocol runs on. For example "dcerpc" refers to the tcp
# version of the protocol as well as the udp version of the protocol.
# The option "enabled" takes 3 values - "yes", "no", "detection-only".
# "yes" enables both detection and the parser, "no" disables both, and
# "detection-only" enables detection only(parser disabled).
app-layer:
protocols:
tls:
enabled: yes
detection-ports:
toserver: 443
#no-reassemble: yes
dcerpc:
enabled: yes
ftp:
enabled: yes
ssh:
enabled: yes
smtp:
enabled: yes
imap:
enabled: detection-only
msn:
enabled: detection-only
smb:
enabled: yes
detection-ports:
toserver: 139
# smb2 detection is disabled internally inside the engine.
#smb2:
# enabled: yes
dns:
# memcaps. Globally and per flow/state.
#global-memcap: 16mb
#state-memcap: 512kb
# How many unreplied DNS requests are considered a flood.
# If the limit is reached, app-layer-event:dns.flooded; will match.
#request-flood: 500
tcp:
enabled: yes
detection-ports:
toserver: 53
udp:
enabled: yes
detection-ports:
toserver: 53
http:
enabled: yes
# memcap: 64mb
###########################################################################
# 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.
# response-body-limit: Limit reassembly of response body for
inspection
# by file_data, http_server_body & pcre /Q
option.
# double-decode-path: Double decode path section of the URI
# double-decode-query: Double decode query section of the URI
#
# 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.
# response-body-limit: Limit reassembly of response body for
inspection
# by file_data, http_server_body & pcre /Q
option.
# double-decode-path: Double decode path section of the URI
# double-decode-query: Double decode query section of the URI
#
# uri-include-all: Include all parts of the URI. By default
the
# 'scheme', username/password, hostname and
port
# are excluded. Setting this option to true
adds
# all of them to the normalized uri as
inspected
# by http_uri, urilen, pcre with /U and the
other
# keywords that inspect the normalized uri.
# Note that this does not affect
http_raw_uri.
# Also, note that including all was the
default in
# 1.4 and 2.0beta1.
#
# meta-field-limit: Hard size limit for request and response
size
# limits. Applies to request line and
headers,
# response line and headers. Does not apply
to
# request or response bodies. Default is
18k.
# If this limit is reached an event is
raised.
#
# 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_2
###########################################################################
libhtp:
default-config:
personality: IDS
# Can be specified in kb, mb, gb. Just a number indicates
# it's in bytes.
request-body-limit: 3072
response-body-limit: 3072
# inspection limits
request-body-minimal-inspect-size: 32kb
request-body-inspect-window: 4kb
response-body-minimal-inspect-size: 32kb
response-body-inspect-window: 4kb
# Take a random value for inspection sizes around the specified
value.
# This lower the risk of some evasion technics but could lead
# detection change between runs. It is set to 'yes' by default.
#randomize-inspection-sizes: yes
# If randomize-inspection-sizes is active, the value of various
# inspection size will be choosen in the [1 - range%, 1 + range%]
# range
# Default value of randomize-inspection-range is 10.
#randomize-inspection-range: 10
# decoding
double-decode-path: no
double-decode-query: no
server-config:
#- apache:
# address: [192.168.1.0/24, 127.0.0.0/8, "::1"]
# personality: Apache_2
# # Can be specified in kb, mb, gb. Just a number indicates
# # it's in bytes.
# request-body-limit: 4096
# response-body-limit: 4096
# double-decode-path: no
# double-decode-query: no
#- iis7:
# address:
# - 192.168.0.0/24
# - 192.168.10.0/24
# personality: IIS_7_0
# # Can be specified in kb, mb, gb. Just a number indicates
# # it's in bytes.
# request-body-limit: 4096
# response-body-limit: 4096
# double-decode-path: no
# double-decode-query: no
# Profiling settings. Only effective if Suricata has been built with the
# the --enable-profiling configure flag.
#
profiling:
# Run profiling for every xth packet. The default is 1, which means we
# profile every packet. If set to 1000, one packet is profiled for every
# 1000 received.
#sample-rate: 1000
# 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
# per keyword profiling
keywords:
enabled: yes
filename: keyword_perf.log
append: yes
# 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
# profiling of locking. Only available when Suricata was built with
# --enable-profiling-locks.
locks:
enabled: no
filename: lock_stats.log
append: yes
# Suricata core dump configuration. Limits the size of the core dump file to
# approximately max-dump. The actual core dump size will be a multiple of
the
# page size. Core dumps that would be larger than max-dump are truncated. On
# Linux, the actual core dump size may be a few pages larger than max-dump.
# Setting max-dump to 0 disables core dumping.
# Setting max-dump to 'unlimited' will give the full core dump file.
# On 32-bit Linux, a max-dump value >= ULONG_MAX may cause the core dump
size
# to be 'unlimited'.
coredump:
max-dump: unlimited
napatech:
# The Host Buffer Allowance for all streams
# (-1 = OFF, 1 - 100 = percentage of the host buffer that can be held
back)
hba: -1
# use_all_streams set to "yes" will query the Napatech service for all
configured
# streams and listen on all of them. When set to "no" the streams
config array
# will be used.
use-all-streams: yes
# The streams to listen on
streams: [1, 2, 3]
# Includes. Files included here will be handled as if they were
# inlined in this configuration file.
#include: include1.yaml
#include: include2.yaml
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