Note: For local LogCollectors, you cannot create syslog listeners on ports 514 and 6514. these ports are used by the LogDecoder service.
There is no need of configuring these 514 and 6514 in Local Log Collector as these are open for logdecoder already. If event sources are configured to send on these ports, the events will be processed automatically.
If there is a need to test syslog functionality, Please run the below command in Logdecoder.
echo "<10> Mar 1 17:34:53 Test">/dev/udp/127.0.0.1/514
Then verify Navigate page to see this event on the device.ip=127.0.0.1