How to handle new tcp port set to listen?

I got up this morning to to read an alert that was sent from my server about a new socket being opened and set to listen on a port.

Following is a summary of new Internet Server Sockets:
>> tcp 0 0 :::33898 :::* LISTEN 4458/java
First how concerned should I be? How do I find out how/why this was opened up on my server? Should it be blocked and how?

Thanks in advance.

 

 

 

 

Top