[CentOS] Tracking Traffic By Port or Process?

[Greg Knaddison]

On 8/1/05, Kennedy Clark <hkclark at gmail.com> wrote:
> Does anyone know of a way to track TCP/IP traffic by TCP/UDP port
> and/or by process/daemon with CentOS?   I know a variety of ways to
> track it in total (e.g., ifInOctets & ifOutOctets with SNMP), but I'm
> not sure how to be approach seeing traffic by application, port, or
> process.
> 

How about http://www.ethereal.com/ ?

I believe that "out of the box" it just monitors everything, but you
can create filters so it only looks for certain activities.  Also, it
can be a hog.

tcpdump is another similar tool.

Greg