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I looking for a way to get the list of the top bandwidth eater on my Juniper ssg5. On my old OpenBSD Box I had a command line version of ntop. It was just perfect.

How can I do the same thing whith the SSG?

Thank you !

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up vote 3 down vote accepted

Nope, you get to set up a port mirror on the switch the SSG is connected to and from there you can sniff, ntop, tcpdump, wireshark, or nfsen as you'd like.

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You can use Junipers session analyzer. You can find it at: You're suppose to make a session dump first and load it then into the analyzer. Instructions can be found here:

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configuring j-flow might be able to help to you.

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J-Flow isn't available on devices running ScreenOS: – James Mar 17 '10 at 19:10
Also, if you've got bandwidth problems, enabling *flow can further destroy network performance. – Tom O'Connor Nov 23 '11 at 15:59
so , what your saying is ScreenOS is a piece of **** ? – The Unix Janitor Nov 28 '11 at 18:01
Nope, just your response. :) And your mastery of your/you're. But seriously, few companies will port the latest technology back to all former products. Port mirroring is probably the best option for the lower end SSG; if you expect to need JunOS functionality you should be getting a newer box (or a SSG-520M/550M). – Robert Novak Apr 10 '12 at 0:31

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