Re: Port Traffic Monitoring

[Dave S. <D.T...@cs...>]

> I would like to use Net-SNMP to monitor the traffic/activity on a
> particular port on a server.  How would I go about doing this?

The SNMP agent will be able to give you individual values for how
much traffic has been going through a particular network interface
on a server.   You'd normally use something like MRTG or Cricket
to graph this over a period of time.

But if you're looking at the traffic to/from a specific UDP (or TCP)
port on the server, then the standard agent doesn't monitor that level
of detail.   The TCP MIB will tell you what connections are established,
but not how much traffic is going over them.  The IF MIB will tell
you how much traffic is being sent over a network interface, but not
which connections it belongs to.

The options are probably either management code within the server
application itself.   Or some form of "real-time" monitoring tool,
such as ethereal (as Sal suggested)
   Ethereal is a separate tool, and is not simply another SNMP MIB.
I don't believe that it uses SNMP at all when gathering its data.
See http://www.ethereal.com/
Or you may find that there are pre-built versions available for
your system.

Dave