Re: [cobalt-users] linux networking commands

[Elmer Fuddpucker <elmer@xxxxxxxxxxxxxx>]

On Mon, 23 Jul 2001, Theo Jones wrote:

} I was wondering if anybody can offer any good command line functions
} for linux networking?  Specifically I would like to test or probe my
} two network ports and see if they are working.  Can you use nestat or top
} to pinpoint activity on the network interfaces perhaps?

	If you are wanting to watch the action, I'd recomend
installing something along the lines of iptraf, netwatch, or
trafshow - all of which will display the traffic in and out in real
time, listing the ports, etc via a consol connection (ssh or
telnet). You can find any of them, and more perhaps, at
http://www.freshmeat.net/

	I run them all here - one is running 24x7 on a dedicated
server/monitor. If you have the ability keeping on running all the
time is a very good thing to do. I prefer trafshow for this though
iptraf is handier for troubleshooting networks. After a while you
get used to the way things scroll across the screen and you start
noticing very quickly when something is amiss. For example we caught
and stopped a formmail exploit a few months before as much as one
spam complaint found it's way back to us - all of a sudden hundreds
of smtp connections started scrolling and they originated from a
domain that sees perhaps a dozen messages on the average month.
Being on top of this kind of stuff sure beats having it sneak
up on you...

	brent

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