.. warning:: This multi threaded setup only works correctly if the NIC
has symmetric RSS hashing. If this is not the case, consider
- using the the 'lb' method below.
+ using the 'lb' method below.
IPS
~~~
Suricata
To set the user and group use the --user <username> and --group
-<groupname> commandline options.
+<groupname> command-line options.
Snaplen
~~~~~~~
default-log-dir: /var/log/suricata/
-This value is overridden by the -l commandline option.
+This value is overridden by the -l command-line option.
Packet acquisition
------------------
- worker-cpu-set:
cpu: [ "all" ]
mode: "exclusive"
- # Use explicitely 3 threads and don't compute number by using
+ # Use explicitly 3 threads and don't compute number by using
# detect-thread-ratio variable:
# threads: 3
prio:
.. image:: suricata-yaml/inline_mode.png
-**Example 13 Normal/IDS (reasembly on ACK'D data)**
+**Example 13 Normal/IDS (reassembly on ACK'D data)**
.. image:: suricata-yaml/Normal_ids_ack_d.png
# 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%]
+ # inspection size will be chosen in the [1 - range%, 1 + range%]
# range
# Default value of randomize-inspection-range is 10.
#randomize-inspection-range: 10
such as `threads`/`copy-mode`/`checksum-checks` settings. Other capture interfaces, such as AF_PACKET, rely on the user that NICs are appropriately configured.
Configuration through kernel does not apply to applications running under DPDK. The application is solely responsible for the
initialization of NICs it is using. So, before the start of Suricata, NICs that Suricata uses, must undergo the process of initialization.
-As a result, there are extra extra configuration options (how NICs can be configured) in the items (interfaces) of the `dpdk.interfaces` list.
+As a result, there are extra configuration options (how NICs can be configured) in the items (interfaces) of the `dpdk.interfaces` list.
At the start of the configuration process, all NIC offloads are disabled to prevent any packet modification.
According to the configuration, checksum validation offload can be enabled to drop invalid packets.
Other offloads can not be currently enabled.
Pull Requests
~~~~~~~~~~~~~
-A github pull request is actually just a pointer to a branch in your tree. Github provides a review interface that we use.
+A github pull request is actually just a pointer to a branch in your tree. GitHub provides a review interface that we use.
#. A branch can only be used in for an individual PR.
#. A branch should not be updated after the pull request
"geoip-feature-123-v2" and so on.
For more details check: `Creating a branch to do your changes <https://redmine.
-openinfosecfoundation.org/projects/suricata/wiki/Github_work_flow#Creating-a-
+openinfosecfoundation.org/projects/suricata/wiki/GitHub_work_flow#Creating-a-
branch-to-do-your-changes>`_
Oss-Fuzz
--------
-Suricata is continuesly fuzz tested in Oss-Fuzz. See https://github.com/google/oss-fuzz/tree/master/projects/suricata
+Suricata is continuously fuzz tested in Oss-Fuzz. See https://github.com/google/oss-fuzz/tree/master/projects/suricata
--enable-debug
-Then, set the debug level from the commandline::
+Then, set the debug level from the command-line::
SC_LOG_LEVEL=Debug suricata -u
This is controlled by implementing progress states. In Suricata, those will be enums that are incremented as the parsing
progresses. A state will start at 0. The higher its value, the closer the transaction would be to completion. Due to how
-the engine tracks detection accross states, there is an upper limit of 48 to the state progress (it must be < 48).
+the engine tracks detection across states, there is an upper limit of 48 to the state progress (it must be < 48).
The engine interacts with transactions' state using a set of callbacks the parser registers. State is defined per flow direction (``STREAM_TOSERVER`` / ``STREAM_TOCLIENT``).
store-depth value and use it rather than ``file-store.stream-depth``.
Using the SHA256 for file names allows for automatic de-duplication of
-extracted files. However, the timestamp of a pre-existing file will be
+extracted files. However, the timestamp of a preexisting file will be
updated if the same files is extracted again, similar to the `touch`
command.
function log (args)
asked_domain = TlsGetSNI()
if string.find(asked_domain, "badguys") then
- -- ok connection to bad guys let's do someting
+ -- ok connection to bad guys let's do something
end
end
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.
+host firewall (NFQ, IPFW, WinDivert), or out of band using active responses.
OPTIONS
--------------
* "capabilities": List of any of the following: "support_errinfo_pdf", "want_32bpp_session", "support_statusinfo_pdu", "strong_asymmetric_keys", "valid_connection_type", "support_monitor_layout_pdu", "support_netchar_autodetect", "support_dynvc_gfx_protocol", "support_dynamic_time_zone", "support_heartbeat_pdu".
* "id": Client product id string.
* "connection_hint": Possible values are "modem", "low_broadband", "satellite", "high_broadband", "wan", "lan", "autodetect".
-* "physical_width": Numeric phyical width of display.
+* "physical_width": Numeric physical width of display.
* "physical_height": Numeric physical height of display.
* "desktop_orientation": Numeric angle of orientation.
* "scale_factor": Numeric scale factor of desktop.
Examples
~~~~~~~~
-The two ``pgsql`` events in this example reprensent a rejected ``SSL handshake`` and a following connection request where the authentication method indicated by the backend was ``md5``::
+The two ``pgsql`` events in this example represent a rejected ``SSL handshake`` and a following connection request where the authentication method indicated by the backend was ``md5``::
{
"timestamp": "2021-11-24T16:56:19.435242+0000",
# Include the decoded application layer (ie. http, dns)
#app-layer: true
- # Log the the current state of the flow record.
+ # Log the current state of the flow record.
#flow: true
#rule:
Syslog Alerting Compatibility
=============================
-Suricata can alert via sylog which is a very handy feature for central log collection, compliance, and reporting to a SIEM. Instructions on setting this up can be found in the .yaml file in the section where you can configure what type of alert (and other) logging you would like.
+Suricata can alert via syslog which is a very handy feature for central log collection, compliance, and reporting to a SIEM. Instructions on setting this up can be found in the .yaml file in the section where you can configure what type of alert (and other) logging you would like.
However, there are different syslog daemons and there can be parsing issues with the syslog format a SIEM expects and what syslog format Suricata sends. The syslog format from Suricata is dependent on the syslog daemon running on the Suricata sensor but often the format it sends is not the format the SIEM expects and cannot parse it properly.
# Include the decoded application layer (ie. http, dns)
app-layer: true
- # Log the the current state of the flow record.
+ # Log the current state of the flow record.
flow: true
rule:
Performance Analysis
====================
-There are many potential causes for for performance issues. In this section we
+There are many potential causes for performance issues. In this section we
will guide you through some options. The first part will cover basic steps and
introduce some helpful tools. The second part will cover more in-depth
explanations and corner cases.
0x8100 on each layer. If the first seen layer has the same VLAN tag but the
inner one has different VLAN tags it will still end up in the same queue in
**cluster_qm** mode. This was observed with the i40e driver up to 2.8.20 and
-the firmare version up to 7.00, feel free to report if newer versions have
+the firmware version up to 7.00, feel free to report if newer versions have
fixed this (see https://suricata.io/support/).
The commands above can be reviewed in detail in the help or manpages of the
``ethtool``. In brief the sequence makes sure the NIC is reset, the number of
RSS queues is set to 16, load balancing is enabled for the NIC, a low entropy
-toepiltz key is inserted to allow for symmetric hashing, receive offloading is
+toeplitz key is inserted to allow for symmetric hashing, receive offloading is
disabled, the adaptive control is disabled for lowest possible latency and
last but not least, the ring rx descriptor size is set to 1024.
Make sure the RSS hash function is Toeplitz:
To use the hyperscan support edit your suricata.yaml. Change the mpm-algo and spm-algo values to 'hs'.
-Alternatively, use this commandline option: --set mpm-algo=hs --set spm-algo=hs
+Alternatively, use this command-line option: --set mpm-algo=hs --set spm-algo=hs
not host 1.2.3.4
-Capture filters are specified on the commandline after all other options::
+Capture filters are specified on the command-line after all other options::
suricata -i eth0 -v not host 1.2.3.4
suricata -i eno1 -c suricata.yaml tcp or udp
Some people made nice tools to plot graphs of the statistics file.
* `ipython and matplotlib script <https://github.com/regit/suri-stats>`_
-* `Monitoring with Zabbix or other <http://christophe.vandeplas.com/2013/11/suricata-monitoring-with-zabbix-or-other.html>`_ and `Code on Github <https://github.com/cvandeplas/suricata_stats>`_
+* `Monitoring with Zabbix or other <http://christophe.vandeplas.com/2013/11/suricata-monitoring-with-zabbix-or-other.html>`_ and `Code on GitHub <https://github.com/cvandeplas/suricata_stats>`_
Suricata has a ``bypass`` keyword that can be used in signatures to exclude traffic from further evaluation.
-The ``bypass`` keyword is useful in cases where there is a large flow expected (e.g. Netflix, Spotify, Youtube).
+The ``bypass`` keyword is useful in cases where there is a large flow expected (e.g. Netflix, Spotify, YouTube).
The ``bypass`` keyword is considered a post-match keyword.
dns.opcode:4;
-Match on DNS requests whre the **opcode** is NOT 0::
+Match on DNS requests where the **opcode** is NOT 0::
dns.opcode:!0;
icmpv4.hdr
^^^^^^^^^^
-Sitcky buffer to match on the whole ICMPv4 header.
+Sticky buffer to match on the whole ICMPv4 header.
icmpv6.hdr
^^^^^^^^^^
<gid>` (``gid``).
As Suricata-update currently considers the rule's ``sid`` only (cf. `Bug#5447
- <https://redmine.openinfosecfoundation.org/issues/5447>`_), it is adviseable
+ <https://redmine.openinfosecfoundation.org/issues/5447>`_), it is advisable
to opt for a completely unique ``sid`` altogether.
rev (revision)
``endswith`` is a short hand notation for::
- content:".php"; isdatat:!1,relative;
+ content:".php"; isdataat:!1,relative;
``endswith`` cannot be mixed with ``offset``, ``within`` or
``distance`` for the same pattern.
projects / thirdparty / suricata.git / commitdiff
