Note that this flag is not needed for the syslog driver, which handles only messages that have a frame header. Syslog-protocol: The syslog-protocol flag specifies that incoming messages are expected to be formatted according to the new IETF syslog protocol standard (RFC5424), but without the frame header. You can forward this raw message in its original form to another syslog-ng node using the syslog-ng() destination, or to a SIEM system, ensuring that the SIEM can process it. Whenever the syslog-ng OSE created rule is there, packets can flow, otherwise the port is closed.

The assumption in this example is that the LOGCHAIN chain is part of a larger ruleset that routes traffic to it. In the following example, the hook-commands() is used with the network() driver and it opens an iptables port automatically as syslog-ng OSE is started/stopped. To execute an external program when the syslog-ng OSE configuration is initiated or torn down, for example, on startup/shutdown or during a syslog-ng OSE reload, use the following options: setup()ĭescription: Defines an external program that is executed when the syslog-ng OSE configuration is initiated, for example, on startup or during a syslog-ng OSE reload.ĭescription: Defines an external program that is executed when the syslog-ng OSE configuration is stopped or torn down, for example, on shutdown or during a syslog-ng OSE reload.Įxample: Using the hook-commands() with a network source Using the hook-commands() when syslog-ng OSE reloads To execute an external program when syslog-ng OSE starts or stops, use the following options: startup()ĭescription: Defines the external program that is executed as syslog-ng OSE starts.ĭescription: Defines the external program that is executed as syslog-ng OSE stops. Using the hook-commands() when syslog-ng OSE starts or stops

For example, if your host is running AppArmor or SELinux, you might have to modify your AppArmor or SELinux configuration to enable syslog-ng OSE to execute external applications. NOTE: The syslog-ng OSE application must be able to start and restart the external program, and have the necessary permissions to do so.

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