Windows File Collection event source that is configured using Install and Update the SFTP Agent and File Collection logs are coming as expected. But, There are unidentified content warnings as below from Event Source.
Dec 29 07:45:41 LogDecoder NwLogDecoder: [SYSLOG] [warning] Unidentified content from 10.10.10.10:58933 received on syslog receiver: '@10.1.1.1 <6> %NIC-6-251036: SFtp Agent, SFtp Agent, -, -, -, -, Detail: 2404: Host 10.10.10.10'
Dec 29 07:45:54 LogDecoder NwLogDecoder: [SYSLOG] [warning] Unidentified content from 10.10.10.10:54780 received on syslog receiver: '@10.1.1.1 <5> %NIC-5-251015: SFtp Agent, SFtp Agent, -, -, -, -, Detail: 2280: Host 10.10.10.10'
These warnings indicating the traffic is from SFTP agent which has been configured as file collection event source in LogCollector->Config->Event Sources->File/Config page.
These unidentified warnings are due to SFTP agent service logs coming from Windows SFTP agent.
Please follow the below steps to stop these warnings.
Login to Windows Event source and edit sasftpagent.conf file to comment out below line.
Restart SFTP agent service on the Windows Services page.
Then Verify Logdecoder /var/log/messages as these unidentified content warnings must have stopped.