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bpfire/config/suricata/suricata.yaml
Peter Müller 464b2117ea suricata.yaml: Fix Landlock path settings 
Suricata will complain if it cannot read its own configuration file,
hence read-only access to /etc/suricata must be allowed. Since the list
applies to directories, rather than files, restricting read access to
only /usr/share/misc/magic.mgc is not possible; reading /usr/share/misc
must be allowed instead.

Fixes: #13645
Tested-by: Peter Müller <peter.mueller@ipfire.org>
Signed-off-by: Peter Müller <peter.mueller@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>
2024-04-29 12:45:19 +00:00

1322 lines
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%YAML 1.1
---
##
## IPFire specific configuration file - an untouched example configuration
## can be found in suricata-example.yaml.
##
vars:
address-groups:
# Include HOME_NET declaration from external file.
include: /var/ipfire/suricata/suricata-homenet.yaml
# Include DNS_SERVERS declaration from external file.
include: /var/ipfire/suricata/suricata-dns-servers.yaml
EXTERNAL_NET: "any"
HTTP_SERVERS: "$HOME_NET"
SMTP_SERVERS: "$HOME_NET"
SQL_SERVERS: "$HOME_NET"
TELNET_SERVERS: "$HOME_NET"
AIM_SERVERS: "$EXTERNAL_NET"
DC_SERVERS: "$HOME_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"
port-groups:
# Incluse HTTP_PORTS declaration from external file.
include: /var/ipfire/suricata/suricata-http-ports.yaml
SHELLCODE_PORTS: "!80"
ORACLE_PORTS: 1521
SSH_PORTS: "[22,222]"
DNP3_PORTS: 20000
MODBUS_PORTS: 502
FILE_DATA_PORTS: "[$HTTP_PORTS,110,143]"
FTP_PORTS: 21
GENEVE_PORTS: 6081
VXLAN_PORTS: 4789
TEREDO_PORTS: 3544
##
## Ruleset specific options.
##
default-rule-path: /var/lib/suricata
rule-files:
# Include enabled ruleset files from external file.
include: /var/ipfire/suricata/suricata-used-rulesfiles.yaml
classification-file: /usr/share/suricata/classification.config
reference-config-file: /usr/share/suricata/reference.config
threshold-file: /usr/share/suricata/threshold.config
##
## Logging options.
##
default-log-dir: /var/log/suricata/
# Global stats configuration
stats:
enabled: no
# The interval field (in seconds) controls the interval at
# which stats are updated in the log.
interval: 8
# Add decode events to stats.
#decoder-events: true
# Decoder event prefix in stats. Has been 'decoder' before, but that leads
# to missing events in the eve.stats records. See issue #2225.
#decoder-events-prefix: "decoder.event"
# Add stream events as stats.
#stream-events: false
# Plugins -- Experimental -- specify the filename for each plugin shared object
plugins:
# - /path/to/plugin.so
# 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'
# Stats.log contains data from various counters of the suricata engine.
- stats:
enabled: no
filename: stats.log
append: no # append to file (yes) or overwrite it (no)
totals: yes # stats for all threads merged together
threads: no # per thread stats
#null-values: yes # print counters that have value 0
# Extensible Event Format (nicknamed EVE) event log in JSON format
- eve-log:
enabled: no
filetype: regular #regular|syslog|unix_dgram|unix_stream|redis
filename: eve.json
# Enable for multi-threaded eve.json output; output files are amended with
# an identifier, e.g., eve.9.json
#threaded: false
#prefix: "@cee: " # prefix to prepend to each log entry
# the following are valid when type: syslog above
#identity: "suricata"
#facility: local5
#level: Info ## possible levels: Emergency, Alert, Critical,
## Error, Warning, Notice, Info, Debug
#ethernet: no # log ethernet header in events when available
#redis:
# server: 127.0.0.1
# port: 6379
# async: true ## if redis replies are read asynchronously
# mode: list ## possible values: list|lpush (default), rpush, channel|publish
# ## lpush and rpush are using a Redis list. "list" is an alias for lpush
# ## publish is using a Redis channel. "channel" is an alias for publish
# key: suricata ## key or channel to use (default to suricata)
# Redis pipelining set up. This will enable to only do a query every
# 'batch-size' events. This should lower the latency induced by network
# connection at the cost of some memory. There is no flushing implemented
# so this setting should be reserved to high traffic Suricata deployments.
# pipelining:
# enabled: yes ## set enable to yes to enable query pipelining
# batch-size: 10 ## number of entries to keep in buffer
# Include top level metadata. Default yes.
#metadata: no
# include the name of the input pcap file in pcap file processing mode
pcap-file: false
# Community Flow ID
# Adds a 'community_id' field to EVE records. These are meant to give
# records a predictable flow ID that can be used to match records to
# output of other tools such as Zeek (Bro).
#
# Takes a 'seed' that needs to be same across sensors and tools
# to make the id less predictable.
# enable/disable the community id feature.
community-id: false
# Seed value for the ID output. Valid values are 0-65535.
community-id-seed: 0
# HTTP X-Forwarded-For support by adding an extra field or overwriting
# the source or destination IP address (depending on flow direction)
# with the one reported in the X-Forwarded-For HTTP header. This is
# helpful when reviewing alerts for traffic that is being reverse
# or forward proxied.
xff:
enabled: no
# Two operation modes are available: "extra-data" and "overwrite".
mode: extra-data
# Two proxy deployments are supported: "reverse" and "forward". In
# a "reverse" deployment the IP address used is the last one, in a
# "forward" deployment the first IP address is used.
deployment: reverse
# Header name where 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
types:
- alert:
# payload: yes # enable dumping payload in Base64
# payload-buffer-size: 4kb # max size of payload buffer to output in eve-log
# payload-printable: yes # enable dumping payload in printable (lossy) format
# packet: yes # enable dumping of packet (without stream segments)
# metadata: no # enable inclusion of app layer metadata with alert. Default yes
# http-body: yes # Requires metadata; enable dumping of HTTP body in Base64
# http-body-printable: yes # Requires metadata; enable dumping of HTTP body in printable format
# Enable the logging of tagged packets for rules using the
# "tag" keyword.
tagged-packets: yes
# Enable logging the final action taken on a packet by the engine
# (e.g: the alert may have action 'allowed' but the verdict be
# 'drop' due to another alert. That's the engine's verdict)
# verdict: yes
# app layer frames
- frame:
# disabled by default as this is very verbose.
enabled: no
- anomaly:
# Anomaly log records describe unexpected conditions such
# as truncated packets, packets with invalid IP/UDP/TCP
# length values, and other events that render the packet
# invalid for further processing or describe unexpected
# behavior on an established stream. Networks which
# experience high occurrences of anomalies may experience
# packet processing degradation.
#
# Anomalies are reported for the following:
# 1. Decode: Values and conditions that are detected while
# decoding individual packets. This includes invalid or
# unexpected values for low-level protocol lengths as well
# as stream related events (TCP 3-way handshake issues,
# unexpected sequence number, etc).
# 2. Stream: This includes stream related events (TCP
# 3-way handshake issues, unexpected sequence number,
# etc).
# 3. Application layer: These denote application layer
# specific conditions that are unexpected, invalid or are
# unexpected given the application monitoring state.
#
# By default, anomaly logging is enabled. When anomaly
# logging is enabled, applayer anomaly reporting is
# also enabled.
enabled: yes
#
# Choose one or more types of anomaly logging and whether to enable
# logging of the packet header for packet anomalies.
types:
# decode: no
# stream: no
# applayer: yes
#packethdr: no
- http:
extended: yes # enable this for extended logging information
# custom allows additional HTTP fields to be included in eve-log.
# the example below adds three additional fields when uncommented
#custom: [Accept-Encoding, Accept-Language, Authorization]
# set this value to one and only one from {both, request, response}
# to dump all HTTP headers for every HTTP request and/or response
# dump-all-headers: none
- dns:
# This configuration uses the new DNS logging format,
# the old configuration is still available:
# https://docs.suricata.io/en/latest/output/eve/eve-json-output.html#dns-v1-format
# As of Suricata 5.0, version 2 of the eve dns output
# format is the default.
#version: 2
# Enable/disable this logger. Default: enabled.
#enabled: yes
# Control logging of requests and responses:
# - requests: enable logging of DNS queries
# - responses: enable logging of DNS answers
# By default both requests and responses are logged.
#requests: no
#responses: no
# Format of answer logging:
# - detailed: array item per answer
# - grouped: answers aggregated by type
# Default: all
#formats: [detailed, grouped]
# DNS record types to log, based on the query type.
# Default: all.
#types: [a, aaaa, cname, mx, ns, ptr, txt]
- tls:
extended: yes # enable this for extended logging information
# output TLS transaction where the session is resumed using a
# session id
#session-resumption: no
# custom controls which TLS fields that are included in eve-log
#custom: [subject, issuer, session_resumed, serial, fingerprint, sni, version, not_before, not_after, certificate, chain, ja3, ja3s]
- files:
force-magic: no # force logging magic on all logged files
# force logging of checksums, available hash functions are md5,
# sha1 and sha256
#force-hash: [md5]
#- drop:
# alerts: yes # log alerts that caused drops
# flows: all # start or all: 'start' logs only a single drop
# # per flow direction. All logs each dropped pkt.
# Enable logging the final action taken on a packet by the engine
# (will show more information in case of a drop caused by 'reject')
# verdict: yes
- smtp:
#extended: yes # enable this for extended logging information
# this includes: bcc, message-id, subject, x_mailer, user-agent
# custom fields logging from the list:
# reply-to, bcc, message-id, subject, x-mailer, user-agent, received,
# x-originating-ip, in-reply-to, references, importance, priority,
# sensitivity, organization, content-md5, date
#custom: [received, x-mailer, x-originating-ip, relays, reply-to, bcc]
# output md5 of fields: body, subject
# for the body you need to set app-layer.protocols.smtp.mime.body-md5
# to yes
#md5: [body, subject]
#- dnp3
- ftp
- rdp
- nfs
- smb
- tftp
- ike
- dcerpc
- krb5
- bittorrent-dht
- snmp
- rfb
- sip
- quic
- dhcp:
enabled: yes
# When extended mode is on, all DHCP messages are logged
# with full detail. When extended mode is off (the
# default), just enough information to map a MAC address
# to an IP address is logged.
extended: no
- ssh
- mqtt:
# passwords: yes # enable output of passwords
- http2
- pgsql:
enabled: no
# passwords: yes # enable output of passwords. Disabled by default
- stats:
totals: yes # stats for all threads merged together
threads: no # per thread stats
deltas: no # include delta values
# bi-directional flows
- flow
# uni-directional flows
#- netflow
# Metadata event type. Triggered whenever a pktvar is saved
# and will include the pktvars, flowvars, flowbits and
# flowints.
#- metadata
# EXPERIMENTAL per packet output giving TCP state tracking details
# including internal state, flags, etc.
# This output is experimental, meant for debugging and subject to
# change in both config and output without any notice.
#- stream:
# all: false # log all TCP packets
# event-set: false # log packets that have a decoder/stream event
# state-update: false # log packets triggering a TCP state update
# spurious-retransmission: false # log spurious retransmission packets
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 overridden 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 overridden in an
# output section. You can leave this out to get the default.
#
# This console log format value can be overridden by the SC_LOG_FORMAT env var.
#default-log-format: "%D: %S: %M"
#
# For the pre-7.0 log format use:
#default-log-format: "[%i] %t [%S] - (%f:%l) <%d> (%n) -- "
# A regex to filter output. Can be overridden in an output section.
# Defaults to empty (no filter).
#
# This value is overridden by the SC_LOG_OP_FILTER env var.
default-output-filter:
# Requires libunwind to be available when Suricata is configured and built.
# If a signal unexpectedly terminates Suricata, displays a brief diagnostic
# message with the offending stacktrace if enabled.
#stacktrace-on-signal: on
# Define your logging outputs. If none are defined, or they are all
# disabled you will get the default: console output.
outputs:
- console:
enabled: no
# type: json
- file:
enabled: no
level: info
filename: /var/log/suricata/suricata.log
# format: "[%i - %m] %z %d: %S: %M"
# type: json
- syslog:
enabled: yes
facility: local5
format: ""
#format: "[%i] <%d> -- "
# type: json
##
## Netfilter configuration
##
nfq:
mode: repeat
repeat-mark: 2147483648
repeat-mask: 2147483648
bypass-mark: 1073741824
bypass-mask: 1073741824
# route-queue: 2
# batchcount: 20
fail-open: no
##
## Step 5: App Layer Protocol Configuration
##
# Configure the app-layer parsers.
#
# The error-policy setting applies to all app-layer parsers. Values can be
# "drop-flow", "pass-flow", "bypass", "drop-packet", "pass-packet", "reject" or
# "ignore" (the default).
#
# The protocol's section details each 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 protocol detection only (parser disabled).
app-layer:
# error-policy: ignore
protocols:
telnet:
enabled: yes
rfb:
enabled: yes
detection-ports:
dp: 5900, 5901, 5902, 5903, 5904, 5905, 5906, 5907, 5908, 5909
mqtt:
enabled: yes
# max-msg-length: 1mb
# subscribe-topic-match-limit: 100
# unsubscribe-topic-match-limit: 100
# Maximum number of live MQTT transactions per flow
# max-tx: 4096
krb5:
enabled: yes
bittorrent-dht:
enabled: yes
snmp:
enabled: yes
ike:
enabled: yes
tls:
enabled: yes
detection-ports:
dp: "[443,444,465,853,993,995]"
# Generate JA3 fingerprint from client hello. If not specified it
# will be disabled by default, but enabled if rules require it.
ja3-fingerprints: auto
# What to do when the encrypted communications start:
# - default: keep tracking TLS session, check for protocol anomalies,
# inspect tls_* keywords. Disables inspection of unmodified
# 'content' signatures.
# - bypass: stop processing this flow as much as possible. No further
# TLS parsing and inspection. Offload flow bypass to kernel
# or hardware if possible.
# - full: keep tracking and inspection as normal. Unmodified content
# keyword signatures are inspected as well.
#
# For best performance, select 'bypass'.
#
encryption-handling: bypass
pgsql:
enabled: no
# Stream reassembly size for PostgreSQL. By default, track it completely.
stream-depth: 0
# Maximum number of live PostgreSQL transactions per flow
# max-tx: 1024
dcerpc:
enabled: yes
# Maximum number of live DCERPC transactions per flow
# max-tx: 1024
ftp:
enabled: yes
# memcap: 64mb
rdp:
enabled: yes
ssh:
enabled: yes
#hassh: yes
http2:
enabled: yes
# Maximum number of live HTTP2 streams in a flow
#max-streams: 4096
# Maximum headers table size
#max-table-size: 65536
# Maximum reassembly size for header + continuation frames
#max-reassembly-size: 102400
smtp:
enabled: yes
raw-extraction: no
# Maximum number of live SMTP transactions per flow
# max-tx: 256
# Configure SMTP-MIME Decoder
mime:
# Decode MIME messages from SMTP transactions
# (may be resource intensive)
# This field supersedes all others because it turns the entire
# process on or off
decode-mime: yes
# Decode MIME entity bodies (ie. Base64, quoted-printable, etc.)
decode-base64: yes
decode-quoted-printable: yes
# Maximum bytes per header data value stored in the data structure
# (default is 2000)
header-value-depth: 2000
# Extract URLs and save in state data structure
extract-urls: yes
# Scheme of URLs to extract
# (default is [http])
#extract-urls-schemes: [http, https, ftp, mailto]
# Log the scheme of URLs that are extracted
# (default is no)
#log-url-scheme: yes
# Set to yes to compute the md5 of the mail body. You will then
# be able to journalize it.
body-md5: no
# Configure inspected-tracker for file_data keyword
inspected-tracker:
content-limit: 100000
content-inspect-min-size: 32768
content-inspect-window: 4096
imap:
enabled: yes
smb:
enabled: yes
detection-ports:
dp: 139, 445
# Maximum number of live SMB transactions per flow
# max-tx: 1024
# Stream reassembly size for SMB streams. By default track it completely.
#stream-depth: 0
nfs:
enabled: yes
# max-tx: 1024
tftp:
enabled: yes
dns:
# memcaps. Globally and per flow/state.
global-memcap: 32mb
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: 512
tcp:
enabled: yes
detection-ports:
dp: 53
udp:
enabled: yes
detection-ports:
dp: 53
http:
enabled: yes
memcap: 256mb
# Byte Range Containers default settings
# byterange:
# memcap: 100mb
# timeout: 60
# memcap: Maximum memory capacity for HTTP
# Default is unlimited, values can be 64mb, e.g.
# 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.
#
# For advanced options, see the user guide
# server-config: List of server configurations to use if address matches
# address: List of IP addresses or networks for this block
# personality: List of personalities used by this block
#
# Then, all the fields from default-config can be overloaded
#
# 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: 100kb
response-body-limit: 100kb
# inspection limits
request-body-minimal-inspect-size: 32kb
request-body-inspect-window: 4kb
response-body-minimal-inspect-size: 40kb
response-body-inspect-window: 16kb
# response body decompression (0 disables)
response-body-decompress-layer-limit: 2
# auto will use http-body-inline mode in IPS mode, yes or no set it statically
http-body-inline: auto
# Decompress SWF files. Disabled by default.
# Two types: 'deflate', 'lzma', 'both' will decompress deflate and lzma
# compress-depth:
# Specifies the maximum amount of data to decompress,
# set 0 for unlimited.
# decompress-depth:
# Specifies the maximum amount of decompressed data to obtain,
# set 0 for unlimited.
swf-decompression:
enabled: no
type: both
compress-depth: 100kb
decompress-depth: 100kb
# Use a random value for inspection sizes around the specified value.
# This lowers the risk of some evasion techniques but could lead
# to 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 chosen from 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
# Can enable LZMA decompression
#lzma-enabled: false
# Memory limit usage for LZMA decompression dictionary
# Data is decompressed until dictionary reaches this size
#lzma-memlimit: 1mb
# Maximum decompressed size with a compression ratio
# above 2048 (only LZMA can reach this ratio, deflate cannot)
#compression-bomb-limit: 1mb
# Maximum time spent decompressing a single transaction in usec
#decompression-time-limit: 100000
# Maximum number of live transactions per flow
#max-tx: 512
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
# Note: Modbus probe parser is minimalist due to the limited usage in the field.
# Only Modbus message length (greater than Modbus header length)
# and protocol ID (equal to 0) are checked in probing parser
# It is important to enable detection port and define Modbus port
# to avoid false positives
modbus:
# How many unanswered Modbus requests are considered a flood.
# If the limit is reached, the app-layer-event:modbus.flooded; will match.
#request-flood: 500
enabled: no
detection-ports:
dp: 502
# According to MODBUS Messaging on TCP/IP Implementation Guide V1.0b, it
# is recommended to keep the TCP connection opened with a remote device
# and not to open and close it for each MODBUS/TCP transaction. In that
# case, it is important to set the depth of the stream reassembling as
# unlimited (stream.reassembly.depth: 0)
# Stream reassembly size for modbus. By default track it completely.
stream-depth: 0
# DNP3
dnp3:
enabled: no
detection-ports:
dp: 20000
# SCADA EtherNet/IP and CIP protocol support
enip:
enabled: no
detection-ports:
dp: 44818
sp: 44818
ntp:
enabled: yes
quic:
enabled: yes
dhcp:
enabled: yes
sip:
#enabled: yes
# Limit for the maximum number of asn1 frames to decode (default 256)
asn1-max-frames: 256
# Datasets default settings
datasets:
# Default fallback memcap and hashsize values for datasets in case these
# were not explicitly defined.
defaults:
#memcap: 100mb
#hashsize: 2048
rules:
# Set to true to allow absolute filenames and filenames that use
# ".." components to reference parent directories in rules that specify
# their filenames.
#allow-absolute-filenames: false
# Allow datasets in rules write access for "save" and
# "state". This is enabled by default, however write access is
# limited to the data directory.
#allow-write: true
##############################################################################
##
## Advanced settings below
##
##############################################################################
##
## Run Options
##
# Run Suricata with a specific user-id and group-id:
run-as:
user: suricata
group: suricata
security:
# if true, prevents process creation from Suricata by calling
# setrlimit(RLIMIT_NPROC, 0)
limit-noproc: true
# Use landlock security module under Linux
landlock:
enabled: yes
directories:
write:
- /run
# /usr and /etc folders are added to read list to allow
# file magic to be used.
read:
- /etc/suricata
- /usr/share/misc
- /usr/share/suricata
- /var/ipfire/suricata
- /var/lib/suricata
lua:
# Allow Lua rules. Disabled by default.
#allow-rules: false
# Some logging modules will use that name in event as identifier. The default
# value is the hostname
#sensor-name: suricata
# Default location of the pid file. The pid file is only used in
# daemon mode (start Suricata with -D). If not running in daemon mode
# the --pidfile command line option must be used to create a pid file.
pid-file: /var/run/suricata.pid
# Daemon working directory
# Suricata will change directory to this one if provided
# Default: "/"
#daemon-directory: "/"
# Umask.
# Suricata will use this umask if it is provided. By default it will use the
# umask passed on by the shell.
#umask: 022
# 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
# If the 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 switched to 'router' in IPS mode
# and 'sniffer-only' in IDS mode.
# This feature is currently only used by the reject* keywords.
host-mode: auto
# Number of packets preallocated per thread. The default is 1024. A higher number
# will make sure each CPU will be more easily kept busy, but may negatively
# impact caching.
#max-pending-packets: 1024
# Runmode the engine should use. Please check --list-runmodes to get the available
# runmodes for each packet acquisition method. Default depends on selected capture
# method. 'workers' generally gives best performance.
runmode: workers
# Specifies the kind of flow load balancer used by the flow pinned autofp mode.
#
# Supported schedulers are:
#
# hash - Flow assigned to threads using the 5-7 tuple hash.
# ippair - Flow assigned to threads using addresses only.
# ftp-hash - Flow assigned to threads using the hash, except for FTP, so that
# ftp-data flows will be handled by the same thread
#
#autofp-scheduler: hash
# Preallocated size for each 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
# Unix command socket that 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. In auto mode, the feature will only be
# activated in live capture mode. You can use the filename variable to set
# the file name of the socket.
unix-command:
enabled: no
#filename: custom.socket
# Magic file
magic-file: /usr/share/misc/magic.mgc
legacy:
uricontent: enabled
##
## Detection settings
##
# Set the order of alerts based on actions
# The default order is pass, drop, reject, alert
# action-order:
# - pass
# - drop
# - reject
# - alert
# Define maximum number of possible alerts that can be triggered for the same
# packet. Default is 15
#packet-alert-max: 15
# Exception Policies
#
# Define a common behavior for all exception policies.
# In IPS mode, the default is drop-flow. For cases when that's not possible, the
# engine will fall to drop-packet. To fallback to old behavior (setting each of
# them individually, or ignoring all), set this to ignore.
# All values available for exception policies can be used, and there is one
# extra option: auto - which means drop-flow or drop-packet (as explained above)
# in IPS mode, and ignore in IDS mode. Exception policy values are: drop-packet,
# drop-flow, reject, bypass, pass-packet, pass-flow, ignore (disable).
exception-policy: pass-packet
# 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
##
## Advanced Traffic Tracking and Reconstruction Settings
##
# 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: []
old-solaris: []
solaris: []
hpux10: []
hpux11: []
irix: []
macos: []
vista: []
windows2k3: []
# Defrag settings:
# The memcap-policy value can be "drop-packet", "pass-packet", "reject" or
# "ignore" (which is the default).
defrag:
memcap: 64mb
# memcap-policy: ignore
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
# 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 determines the size of the hash used to identify flows inside
# the engine, and by default the value is 65536.
# At startup, the engine can preallocate a number of flows, to get better
# performance. The number of flows preallocated is 10000 by default.
# emergency-recovery is the percentage of flows that the engine needs to
# prune before clearing the emergency state. The emergency state is activated
# when the memcap limit is reached, allowing new flows to be created, but
# pruning 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 doesn't find a flow to prune, it will set
# the emergency bit and it will try again with more aggressive timeouts.
# If that doesn't work, then it will try to kill the oldest flows using
# last time seen flows.
# The memcap can be specified in kb, mb, gb. Just a number indicates it's
# in bytes.
# The memcap-policy can be "drop-packet", "pass-packet", "reject" or "ignore"
# (which is the default).
flow:
memcap: 256mb
#memcap-policy: ignore
hash-size: 65536
prealloc: 10000
emergency-recovery: 30
#managers: 1 # default to one flow manager
#recyclers: 1 # default to one flow recycler thread
# 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
# This option controls the use of livedev ids in the flow (and defrag)
# hashing. This is enabled by default and should be disabled if
# multiple live devices are used to capture traffic from the same network
livedev:
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" determines the seconds to wait after a handshake or
# stream startup before the engine frees 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 that time elapses
# without receiving new packets or closing the connection. "closed" is the
# amount of time to wait after a flow is closed (usually zero). "bypassed"
# timeout controls locally bypassed flows. For these flows we don't do any other
# tracking. If no packets have been seen after this timeout, the flow is discarded.
#
# 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
bypassed: 100
emergency-new: 10
emergency-established: 100
emergency-closed: 0
emergency-bypassed: 50
tcp:
new: 60
established: 600
closed: 60
bypassed: 100
emergency-new: 5
emergency-established: 100
emergency-closed: 10
emergency-bypassed: 50
udp:
new: 30
established: 300
bypassed: 100
emergency-new: 10
emergency-established: 100
emergency-bypassed: 50
icmp:
new: 30
established: 300
bypassed: 100
emergency-new: 10
emergency-established: 100
emergency-bypassed: 50
# Stream engine settings. Here the TCP stream tracking and reassembly
# engine is configured.
#
# stream:
# memcap: 64mb # Can be specified in kb, mb, gb. Just a
# # number indicates it's in bytes.
# memcap-policy: ignore # Can be "drop-flow", "pass-flow", "bypass",
# # "drop-packet", "pass-packet", "reject" or
# # "ignore" default is "ignore"
# checksum-validation: yes # To validate the checksum of received
# # packet. If csum validation is specified as
# # "yes", then packets with invalid csum values will not
# # be processed by the engine stream/app layer.
# # Warning: locally generated traffic 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: 2048 # 2k sessions prealloc'd per stream thread
# midstream: false # don't allow midstream session pickups
# midstream-policy: ignore # Can be "drop-flow", "pass-flow", "bypass",
# # "drop-packet", "pass-packet", "reject" or
# # "ignore" default is "ignore"
# async-oneside: false # don't enable async stream handling
# inline: no # stream inline mode
# drop-invalid: yes # in inline mode, drop packets that are invalid with regards to streaming engine
# max-syn-queued: 10 # Max different SYNs to queue
# max-synack-queued: 5 # Max different SYN/ACKs to queue
# bypass: no # Bypass packets when stream.reassembly.depth is reached.
# # Warning: first side to reach this triggers
# # the bypass.
# liberal-timestamps: false # Treat all timestamps as if the Linux policy applies. This
# # means it's slightly more permissive. Enabled by default.
#
# reassembly:
# memcap: 256mb # Can be specified in kb, mb, gb. Just a number
# # indicates it's in bytes.
# memcap-policy: ignore # Can be "drop-flow", "pass-flow", "bypass",
# # "drop-packet", "pass-packet", "reject" or
# # "ignore" default is "ignore"
# 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.
# 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.
# randomize-chunk-size: yes # Take a random value for chunk size around the specified value.
# # This lowers the risk of some evasion techniques but could lead
# # to 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)*toserver-chunk-size
# # and (1 + randomize-chunk-range/100)*toserver-chunk-size and the same
# # calculation for toclient-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.
#
# segment-prealloc: 2048 # number of segments preallocated per thread
#
# check-overlap-different-data: true|false
# # check if a segment contains different data
# # than what we've already seen for that
# # position in the stream.
# # This is enabled automatically if inline mode
# # is used or when stream-event:reassembly_overlap_different_data;
# # is used in a rule.
#
stream:
memcap: 256mb
prealloc-sessions: 4096
#memcap-policy: ignore
checksum-validation: yes # reject incorrect csums
midstream: true
midstream-policy: pass-flow
inline: auto # auto will use inline mode in IPS mode, yes or no set it statically
bypass: yes # Bypass packets when stream.reassembly.depth is reached.
reassembly:
memcap: 256mb
#memcap-policy: ignore
depth: 1mb # reassemble 1mb into a stream
toserver-chunk-size: 2560
toclient-chunk-size: 2560
randomize-chunk-size: yes
#randomize-chunk-range: 10
raw: yes
segment-prealloc: 2048
check-overlap-different-data: true
# Host table:
#
# Host table is used by the tagging and per host thresholding subsystems.
#
host:
hash-size: 4096
prealloc: 1000
memcap: 32mb
# IP Pair table:
#
# Used by xbits 'ippair' tracking.
#
#ippair:
# hash-size: 4096
# prealloc: 1000
# memcap: 32mb
# Decoder settings
decoder:
# Teredo decoder is known to not be completely accurate
# as it will sometimes detect non-teredo as teredo.
teredo:
enabled: false
# ports to look for Teredo. Max 4 ports. If no ports are given, or
# the value is set to 'any', Teredo detection runs on _all_ UDP packets.
ports: $TEREDO_PORTS # syntax: '[3544, 1234]' or '3533' or 'any'.
# VXLAN decoder is assigned to up to 4 UDP ports. By default only the
# IANA assigned port 4789 is enabled.
vxlan:
enabled: true
ports: $VXLAN_PORTS # syntax: '[8472, 4789]' or '4789'.
# Geneve decoder is assigned to up to 4 UDP ports. By default only the
# IANA assigned port 6081 is enabled.
geneve:
enabled: true
ports: $GENEVE_PORTS # syntax: '[6081, 1234]' or '6081'.
# maximum number of decoder layers for a packet
# max-layers: 16
##
## Performance tuning and profiling
##
# The detection engine builds internal groups of signatures. The engine
# allows us to specify the profile to use for them, to manage memory in an
# efficient way keeping 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 in the "custom-values" section.
# 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. When a value is not specified, there are no limits on the recursion.
detect:
profile: medium
custom-values:
toclient-groups: 3
toserver-groups: 25
sgh-mpm-context: auto
inspection-recursion-limit: 3000
# 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
prefilter:
# default prefiltering setting. "mpm" only creates MPM/fast_pattern
# engines. "auto" also sets up prefilter engines for other keywords.
# Use --list-keywords=all to see which keywords support prefiltering.
default: mpm
# the grouping values above control how many groups are created per
# direction. Port whitelisting forces that port to get its own group.
# Very common ports will benefit, as well as ports with many expensive
# rules.
grouping:
#tcp-whitelist: 53, 80, 139, 443, 445, 1433, 3306, 3389, 6666, 6667, 8080
#udp-whitelist: 53, 135, 5060
profiling:
# Log the rules that made it past the prefilter stage, per packet
# default is off. The threshold setting determines how many rules
# must have made it past pre-filter for that rule to trigger the
# logging.
#inspect-logging-threshold: 200
grouping:
dump-to-disk: false
include-rules: false # very verbose
include-mpm-stats: false
# Select the multi pattern algorithm you want to run for scan/search the
# in the engine.
#
# The supported algorithms are:
# "ac" - Aho-Corasick, default implementation
# "ac-bs" - Aho-Corasick, reduced memory implementation
# "ac-ks" - Aho-Corasick, "Ken Steele" variant
# "hs" - Hyperscan, available when built with Hyperscan support
#
# The default mpm-algo value of "auto" will use "hs" if Hyperscan is
# available, "ac" otherwise.
#
# The mpm you choose also decides the distribution of mpm contexts for
# signature groups, specified by the conf - "detect.sgh-mpm-context".
# Selecting "ac" as the mpm would require "detect.sgh-mpm-context"
# to be set to "single", because of ac's memory requirements, unless the
# ruleset is small enough to fit in memory, in which case one can
# use "full" with "ac". The rest of the mpms can be run in "full" mode.
mpm-algo: auto
# Select the matching algorithm you want to use for single-pattern searches.
#
# Supported algorithms are "bm" (Boyer-Moore) and "hs" (Hyperscan, only
# available if Suricata has been built with Hyperscan support).
#
# The default of "auto" will use "hs" if available, otherwise "bm".
spm-algo: auto
# Suricata is multi-threaded. Here the threading can be influenced.
threading:
set-cpu-affinity: no
# Tune cpu affinity of threads. Each family of threads can be bound
# to specific CPUs.
#
# These 2 apply to the all runmodes:
# management-cpu-set is used for flow timeout handling, counters
# worker-cpu-set is used for 'worker' threads
#
# Additionally, for autofp these apply:
# receive-cpu-set is used for capture threads
# verdict-cpu-set is used for IPS verdict threads
#
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
- worker-cpu-set:
cpu: [ "all" ]
mode: "exclusive"
# Use explicitly 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"
#
# 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: 1.0
#
# By default, the per-thread stack size is left to its default setting. If
# the default thread stack size is too small, use the following configuration
# setting to change the size. Note that if any thread's stack size cannot be
# set to this value, a fatal error occurs.
#
# Generally, the per-thread stack-size should not exceed 8MB.
#stack-size: 8mb
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