The RELP listener support the new reliable event logging protocol (RELP), which enables a more reliable transmission of messages than plain tcp syslog protocol. The service permits to accept messages from senders who themselves support RELP.
Other than that it is using a different communications protocol, the RELP listener is functionally equivalent to the syslog listener. The RELP Listener will automatically listen on all available IP Addresses which includes IPv4 and IPv6. This is due the librelp implementation method.
Figure 1: RELP Listener Properties
Listener Port
The port the RELP Listener listens on. The typical (standard) value is 20514. This should be changed only if there is a definite need for it. Such a need typically arises from security concerns. If the port is changed, all reporting devices must also be configured to use the non-standard port.
Session Timeout
It controls how long a session is to be opened from the server side.
Rule Set to Use
Name of the rule set to be used for this service. The Rule Set name must be a valid Rule Set.