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What network monitoring tool do you recommend?

Ulf Dittmer

Joined: Mar 22, 2005
Posts: 39578
Every so often I get the urge to monitor more closely what's going in and out of my machine, so I'm looking for a network monitoring application for OS X 10.4. Nothing fancy, just a little GUI that shows how much data is sent and received to/from which host, along with port/protocol used, and the local process/application that's sending/receiving. A great bonus feature would be if it can run continuously as a daemon, too, and log the data into some file. Does anyone have a recommendation? Shareware is fine. Must be PowerPC-compatible, my hardware is a bit dated...

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Pauline McNamara

Joined: Jan 19, 2001
Posts: 4012
Hey Ulf. I just got this tip, maybe it's worth checking out...
Ulf Dittmer

Joined: Mar 22, 2005
Posts: 39578
Thanks Pauline.

The "Sidekick" application from the same author comes close to what I'm looking for (it's missing information about the local process thats's doing the communicating). But knowing which hosts are accessed is a good first step.
Anand Hariharan

Joined: Aug 22, 2006
Posts: 257

I have used ethereal and would recommend it. While I don't know for a fact, am fairly certain that a port to Mac OS should be available.

- Anand

"Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away." -- Antoine de Saint-Exupery
Ulf Dittmer

Joined: Mar 22, 2005
Posts: 39578
That's a good suggestion, Anand. I had forgotten about ethereal. An OS X version (called AquaEthereal) does indeed exist.
Ben Souther

Joined: Dec 11, 2004
Posts: 13410

I use tcpflow when doing web development. It's not a graphical app but it was made to run continuously log the traffic.
A quick look at their web page shows that they have a version for OSX as well as the source if you want to build it yourself.
[ February 27, 2008: Message edited by: Ben Souther ]

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I agree. Here's the link:
subject: What network monitoring tool do you recommend?
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