Provided by: suricata_6.0.4-3_amd64 
NAME
suricata - Suricata
SYNOPSIS
suricata [OPTIONS] [BPF FILTER]
DESCRIPTION
suricata is a high performance Network IDS, IPS and Network Security Monitoring engine. Open Source and
owned by a community run non-profit foundation, the Open Information Security Foundation (OISF).
suricata can be used to analyze live traffic and pcap files. It can generate alerts based on rules.
suricata will generate traffic logs.
When used with live traffic suricata can be passive or active. Active modes are: inline in a L2 bridge
setup, inline with L3 integration with host filewall (NFQ, IPFW, WinDivert), or out of band using active
responses.
OPTIONS
-h Display a brief usage overview.
-V Displays the version of Suricata.
-c <path>
Path to configuration file.
-T Test configuration.
-v Increase the verbosity of the Suricata application logging by increasing the log level from the
default. This option can be passed multiple times to further increase the verbosity.
• -v: INFO
• -vv: PERF
• -vvv: CONFIG
• -vvvv: DEBUG
This option will not decrease the log level set in the configuration file if it is already more
verbose than the level requested with this option.
-r <path>
Run in pcap offline mode (replay mode) reading files from pcap file. If <path> specifies a
directory, all files in that directory will be processed in order of modified time maintaining
flow state between files.
--pcap-file-continuous
Used with the -r option to indicate that the mode should stay alive until interrupted. This is
useful with directories to add new files and not reset flow state between files.
--pcap-file-recursive
Used with the -r option when the path provided is a directory. This option
enables recursive traversal into subdirectories to a maximum depth of 255.
This option cannot be combined with --pcap-file-continuous. Symlinks are
ignored.
--pcap-file-delete
Used with the -r option to indicate that the mode should delete pcap files after they have been
processed. This is useful with pcap-file-continuous to continuously feed files to a directory and
have them cleaned up when done. If this option is not set, pcap files will not be deleted after
processing.
-i <interface>
After the -i option you can enter the interface card you would like to use to sniff packets from.
This option will try to use the best capture method available. Can be used several times to sniff
packets from several interfaces.
--pcap[=<device>]
Run in PCAP mode. If no device is provided the interfaces provided in the pcap section of the
configuration file will be used.
--af-packet[=<device>]
Enable capture of packet using AF_PACKET on Linux. If no device is supplied, the list of devices
from the af-packet section in the yaml is used.
-q <queue id>
Run inline of the NFQUEUE queue ID provided. May be provided multiple times.
-s <filename.rules>
With the -s option you can set a file with signatures, which will be loaded together with the
rules set in the yaml.
-S <filename.rules>
With the -S option you can set a file with signatures, which will be loaded exclusively,
regardless of the rules set in the yaml.
-l <directory>
With the -l option you can set the default log directory. If you already have the default-log-dir
set in yaml, it will not be used by Suricata if you use the -l option. It will use the log dir
that is set with the -l option. If you do not set a directory with the -l option, Suricata will
use the directory that is set in yaml.
-D Normally if you run Suricata on your console, it keeps your console occupied. You can not use it
for other purposes, and when you close the window, Suricata stops running. If you run Suricata as
daemon (using the -D option), it runs at the background and you will be able to use the console
for other tasks without disturbing the engine running.
--runmode <runmode>
With the --runmode option you can set the runmode that you would like to use. This command line
option can override the yaml runmode option.
Runmodes are: workers, autofp and single.
For more information about runmodes see Runmodes in the user guide.
-F <bpf filter file>
Use BPF filter from file.
-k [all|none]
Force (all) the checksum check or disable (none) all checksum checks.
--user=<user>
Set the process user after initialization. Overrides the user provided in the run-as section of
the configuration file.
--group=<group>
Set the process group to group after initialization. Overrides the group provided in the run-as
section of the configuration file.
--pidfile <file>
Write the process ID to file. Overrides the pid-file option in the configuration file and forces
the file to be written when not running as a daemon.
--init-errors-fatal
Exit with a failure when errors are encountered loading signatures.
--disable-detection
Disable the detection engine.
--dump-config
Dump the configuration loaded from the configuration file to the terminal and exit.
--dump-features
Dump the features provided by Suricata modules and exit. Features list (a subset of) the
configuration values and are intended to assist with comparing provided features with those
required by one or more rules.
--build-info
Display the build information the Suricata was built with.
--list-app-layer-protos
List all supported application layer protocols.
--list-keywords=[all|csv|<kword>]
List all supported rule keywords.
--list-runmodes
List all supported run modes.
--set <key>=<value>
Set a configuration value. Useful for overriding basic configuration parameters. For example, to
change the default log directory:
--set default-log-dir=/var/tmp
This option cannot be used to add new entries to a list in the configuration file, such as a new
output. It can only be used to modify a value in a list that already exists.
For example, to disable the eve-log in the default configuration file:
--set outputs.1.eve-log.enabled=no
Also note that the index values may change as the suricata.yaml is updated.
See the output of --dump-config for existing values that could be modified with their index.
--engine-analysis
Print reports on analysis of different sections in the engine and exit. Please have a look at the
conf parameter engine-analysis on what reports can be printed
--unix-socket=<file>
Use file as the Suricata unix control socket. Overrides the filename provided in the unix-command
section of the configuration file.
--reject-dev=<device>
Use device to send out RST / ICMP error packets with the reject keyword.
--pcap-buffer-size=<size>
Set the size of the PCAP buffer (0 - 2147483647).
--netmap[=<device>]
Enable capture of packet using NETMAP on FreeBSD or Linux. If no device is supplied, the list of
devices from the netmap section in the yaml is used.
--pfring[=<device>]
Enable PF_RING packet capture. If no device provided, the devices in the Suricata configuration
will be used.
--pfring-cluster-id <id>
Set the PF_RING cluster ID.
--pfring-cluster-type <type>
Set the PF_RING cluster type (cluster_round_robin, cluster_flow).
-d <divert-port>
Run inline using IPFW divert mode.
--dag <device>
Enable packet capture off a DAG card. If capturing off a specific stream the stream can be select
using a device name like "dag0:4". This option may be provided multiple times read off multiple
devices and/or streams.
--napatech
Enable packet capture using the Napatech Streams API.
--erf-in=<file>
Run in offline mode reading the specific ERF file (Endace extensible record format).
--simulate-ips
Simulate IPS mode when running in a non-IPS mode.
OPTIONS FOR DEVELOPERS
-u Run the unit tests and exit. Requires that Suricata be configured with --enable-unittests.
-U, --unittest-filter=REGEX
With the -U option you can select which of the unit tests you want to run. This option uses REGEX.
Example of use: suricata -u -U http
--list-unittests
Lists available unit tests.
--fatal-unittests
Enables fatal failure on a unit test error. Suricata will exit instead of continuing more tests.
--unittests-coverage
Display unit test coverage report.
SIGNALS
Suricata will respond to the following signals:
SIGUSR2
Causes Suricata to perform a live rule reload.
SIGHUP
Causes Suricata to close and re-open all log files. This can be used to re-open log files after they
may have been moved away by log rotation utilities.
FILES AND DIRECTORIES
/usr/local/etc/suricata/suricata.yaml
Default location of the Suricata configuration file.
/usr/local/var/log/suricata
Default Suricata log directory.
EXAMPLES
To capture live traffic from interface eno1:
suricata -i eno1
To analyze a pcap file and output logs to the CWD:
suricata -r /path/to/capture.pcap
To capture using AF_PACKET and override the flow memcap setting from the suricata.yaml:
suricata --af-packet --set flow.memcap=1gb
To analyze a pcap file with a custom rule file:
suricata -r /pcap/to/capture.pcap -S /path/to/custom.rules
BUGS
Please visit Suricata's support page for information about submitting bugs or feature requests.
NOTES
• Suricata Home Page
https://suricata-ids.org/
• Suricata Support Page
https://suricata-ids.org/support/
COPYRIGHT
2016-2019, OISF
6.0.1 Nov 08, 2020 SURICATA(1)