Hi,

We have a setup where there are multiple nodes generating application logs and 
events (a form of logs).


On one of the node rsyslog is configured to use UDP (port: 1000). Call it Master

On all nodes events are forwarded to the master using internalIP:1000

Master node also hosts Ethernet interface towards the backhaul.


In rsyslog-master.conf file

input(type="imudp" port="1025") -- address is not given.


In each individual node, we had recently added an action to stream events 
collected in local7 facility to an external server.

local7.* action(type="omfwd" Target="11.11.11.11" Port="514" Protocol="udp" 
Template="ForwardFormat")


Observation:

Master node was receiving the events from local7 sent to external server at 
port 514.


Resolution:

Rsyslog on Master node was configured with address, after which there were no 
duplicate events logged on Master node.

input(type="imudp" address="169.1.1.2" port="1025") -- address added.


Question:

When port numbers were different why master node without IP address received 
both the events. Protocol was same, but the ports were different.


Appreciate your help in helping me understand the behaviour.


Thanks and Regards
Lak.


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