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bpfire/config/suricata/suricata.yaml
Stefan Schantl 961a27b5e2 suricata: Use DNS_SERVERS declaration from external file. 
These settings now will be read from
/var/ipfire/suricata/suricata-dns-servers.yaml, which will be
generated by the generate_dns_servers_file() function, located in
ids-functions.pl and called by various scripts.

Fixes #12166.

Signed-off-by: Stefan Schantl <stefan.schantl@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>
2019-11-13 19:14:27 +00:00

740 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:
HTTP_PORTS: "80"
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
##
## Ruleset specific options.
##
default-rule-path: /var/lib/suricata
rule-files:
# Include enabled ruleset files from external file.
include: /var/ipfire/suricata/suricata-used-rulefiles.yaml
classification-file: /var/lib/suricata/classification.config
reference-config-file: /var/lib/suricata/reference.config
threshold-file: /var/lib/suricata/threshold.config
##
## Logging options.
##
default-log-dir: /var/log/suricata/
# global stats configuration
stats:
enabled: yes
# The interval field (in seconds) controls at what interval
# the loggers are invoked.
interval: 8
# Add decode events as 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
# 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
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
# 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: no
# type: json
- file:
enabled: no
level: info
filename: /var/log/suricata/suricata.log
# type: json
- syslog:
enabled: yes
facility: local5
format: ""
# type: json
##
## Netfilter configuration
##
nfq:
mode: repeat
repeat-mark: 1879048192
repeat-mask: 1879048192
# bypass-mark: 1
# bypass-mask: 1
# route-queue: 2
# batchcount: 20
fail-open: yes
##
## Step 5: App Layer Protocol Configuration
##
# Configure the app-layer parsers. The protocols 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:
protocols:
krb5:
enabled: no # Requires rust
ikev2:
enabled: yes
tls:
enabled: yes
detection-ports:
dp: "[443,444,465,853,993,995]"
# Completely stop processing TLS/SSL session after the handshake
# completed. If bypass is enabled this will also trigger flow
# bypass. If disabled (the default), TLS/SSL session is still
# tracked for Heartbleed and other anomalies.
#no-reassemble: yes
dcerpc:
enabled: yes
ftp:
enabled: yes
ssh:
enabled: yes
smtp:
enabled: yes
# Configure SMTP-MIME Decoder
mime:
# Decode MIME messages from SMTP transactions
# (may be resource intensive)
# This field supercedes 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
# 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
msn:
enabled: yes
smb:
enabled: yes
detection-ports:
dp: 139, 445
# smb2 detection is disabled internally inside the engine.
#smb2:
# 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
# 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
# response-body-decompress-layer-limit:
# Limit to how many layers of compression will be
# decompressed. Defaults to 2.
#
# 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: 0
response-body-limit: 0
# 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
# 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
# Limit for the maximum number of asn1 frames to decode (default 256)
asn1-max-frames: 256
##############################################################################
##
## Advanced settings below
##
##############################################################################
##
## Run Options
##
# Run suricata as user and group.
run-as:
user: suricata
group: suricata
# 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 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
# 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. Defaults to "autofp" (auto flow pinned
# load balancing).
runmode: workers
# 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
# 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
# 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. 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 bassed on actions
# The default order is pass, drop, reject, alert
# action-order:
# - pass
# - drop
# - reject
# - alert
# 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:
defrag:
memcap: 64mb
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 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: 256mb
hash-size: 65536
prealloc: 10000
emergency-recovery: 30
managers: 1
recyclers: 1
# 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). "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: 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
# drop-invalid: yes # in inline mode, drop packets that are invalid with regards to streaming engine
# max-synack-queued: 5 # Max different SYN/ACKs to queue
# bypass: no # Bypass packets when stream.depth is reached
#
# 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.
# 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 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)*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
checksum-validation: yes # reject wrong csums
inline: auto # auto will use inline mode in IPS mode, yes or no set it statically
reassembly:
memcap: 256mb
depth: 1mb # reassemble 1mb into a stream
toserver-chunk-size: 2560
toclient-chunk-size: 2560
randomize-chunk-size: yes
raw: yes
segment-prealloc: 2048
check-overlap-different-data: true
# Host table:
#
# Host table is used by 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
# it will sometimes detect non-teredo as teredo.
teredo:
enabled: false
##
## Performance tuning and profiling
##
# 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:
profile: custom
custom-values:
toclient-groups: 200
toserver-groups: 200
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 it's 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-cuda" - Aho-Corasick, CUDA 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 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: 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
# on 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"
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
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