NXLOG - UDP packets error and received unknown port. What is this?

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Ana

Hello,

 

I have NXLOG installed, and use UDP to receive and sent the servers logs. However, when I run the netstat command I found that there are packets on error and other received through unknown ports. See the lines shown :

 

UDP:

 123234944 packets received

223432 packets to unknown port received.

523455 packet receive errors

2111 packets sent

Why does it happen? I didn't configure any other port on my NXLOG and the firewall rules only accept 514 port to communicate with my NXLOG server.

How could I verify what is this? Is it normal?

 

Thank you very much for your help and answer

 

Cordially,

 

Ana