Easy way to see what ports are most commonly used?

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Jamie Kahn Genet - 06 Jan 2008 01:09 GMT

I'm setting up QoS on my router and I'd like to shape the most active
used ports. Is there built into OSX (I'm on 10.5.1) an easy way to keep
a record of what ports are used and how frequently/how much over a set
time period? Or a nice third part app? It will not be used often so I'm
not sure I want to pay, though that's not totally out of the question.

Regards,
Jamie Kahn Genet

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Tom Stiller - 06 Jan 2008 03:06 GMT

> I'm setting up QoS on my router and I'd like to shape the most active
> used ports. Is there built into OSX (I'm on 10.5.1) an easy way to keep
> a record of what ports are used and how frequently/how much over a set
> time period? Or a nice third part app? It will not be used often so I'm
> not sure I want to pay, though that's not totally out of the question.

Does netstat provide the data you need?

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Wes Groleau - 06 Jan 2008 20:16 GMT

I'm not sure I'd call it easy, but I'd let tcpdump run for the
time period needed, then feed the results into a perl program
to count how many times each port is used. To get fancier,
you could also have it find min, max, avg, total, etc. of
packet sizes for each port.

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Wes Groleau

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Mac Forum / General / Networking / January 2008

Easy way to see what ports are most commonly used?