fromhost-ip is where the connection came from, note that hostname in the message itself is maintained.

what I do is I make a custom template that reformats the message to have JSON as the syslog message (usually with $!msg to contain the original message), and that lets me add other metadata (usually under $!trusted)

This lets me do something like $!trusted!relay!fromhost-ip to contain the fromhost-ip that the relay sees. I usually log the hostnme of the relay, the timestamp of when the relay got the message, as well as the IP that the message came from.

David Lang



On Fri, 7 Feb 2020, Fabien STEFANIAK via rsyslog wrote:

Date: Fri, 7 Feb 2020 09:23:29 +0100 (CET)
From: Fabien STEFANIAK via rsyslog <[email protected]>
To: [email protected]
Cc: Fabien STEFANIAK <[email protected]>
Subject: [rsyslog] Relp forwarding and transfer of the $fromhost-ip property


Hello ! I work on the creation of architecture on logs managements for internal purpose of a university. I would like to forwarding logs between of logs management servers with RELP protocol. First to create a test server to validate new configuration of centralization with a duplicate of all logs, and later for a server of elastic search integration. I have face to a problem, the second server receive the log with the $fromhost-ip of the server sending the replication (not the IP source of logs) but i need to apply different file name template based on network ip source. Is-it possible to transfer the $fromhost-ip property without works on message transmitted ? (less processing apply on logs is better for legal purpose) Thanks for helping if you have the solution... Fabien Stéfaniak _______________________________________________
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