How to listen to port traffic on a Linux server

Every network administrator needs to know how to listen to port traffic on a server. Here’s one way to do it on Linux. So you have a Linux server up and running, but you either suspect there might be some nefarious traffic coming in, or you just want to know what’s going on at all times with this new machine.

Link: How to listen to port traffic on a Linux server
via http://www.techrepublic.com

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