This is a module for iptables and ip6tables logs. It parses logs received over the network via syslog or from a file. Also, it understands the prefix added by some Ubiquiti firewalls, which includes the rule set name, rule number and the action performed on the traffic (allow/deny).
When you run the module, it performs a few tasks under the hood:
Sets the default input to
syslogand binds to
9001(but don’t worry, you can override the defaults).
- Uses an ingest pipeline to parse and process the log lines, shaping the data into a structure suitable for visualizing in Kibana.
- Deploys dashboards for visualizing the log data.
Read the quick start to learn how to configure and run modules.
Configure the moduleedit
You can further refine the behavior of the
iptables module by specifying
variable settings in the
modules.d/iptables.yml file, or overriding settings at the command line.
You must enable at least one fileset in the module. Filesets are disabled by default.
The module is by default configured to run via syslog on port 9001. However it can also be configured to read from a file path. See the following example.
- module: iptables log: enabled: true var.paths: ["/var/log/iptables.log"] var.input: "file"
Each fileset has separate variable settings for configuring the behavior of the
module. If you don’t specify variable settings, the
iptables module uses
For advanced use cases, you can also override input settings. See Override input settings.
When you specify a setting at the command line, remember to prefix the
setting with the module name, for example,
log log fileset settingsedit
An array of glob-based paths that specify where to look for the log files. All
patterns supported by Go Glob
are also supported here. For example, you can use wildcards to fetch all files
from a predefined level of subdirectories:
/path/to/log/*/*.log. This fetches all
.logfiles from the subfolders of
/path/to/log. It does not fetch log files from the
/path/to/logfolder itself. If this setting is left empty, Filebeat will choose log paths based on your operating system.
The interface to listen to UDP based syslog traffic. Defaults to
localhost. Set to
0.0.0.0to bind to all available interfaces.
The UDP port to listen for syslog traffic. Defaults to
Ports below 1024 require Filebeat to run as root.
A list of tags to include in events. Including
forwardedindicates that the events did not originate on this host and causes
host.nameto not be added to events. Defaults to
Time zone supportedit
This module parses logs that don’t contain time zone information. For these logs,
Filebeat reads the local time zone and uses it when parsing to convert the
timestamp to UTC. The time zone to be used for parsing is included in the event
To disable this conversion, the
event.timezone field can be removed with
If logs are originated from systems or applications with a different time zone to
the local one, the
event.timezone field can be overwritten with the original
time zone using the
See Processors for information about specifying processors in your config.
This module comes with sample dashboards showing geolocation and network protocols used. One for all iptables logs:
and one specific for Ubiquiti Firewall logs:
For a description of each field in the module, see the exported fields section.