Some Switches have a copying/SPAN mode to allow you to monitor active interfaces/vlans. Quoting Rich Adamson <[EMAIL PROTECTED]>:
The Bad News:
| VoIPong is a utility which detects all Voice Over IP calls on a | pipeline, and for those which are G711 encoded, dumps actual | conversation to seperate wave files. It supports SIP, H323, Cisco's | Skinny Client Protocol, RTP and RTCP.
This actually sounds very much like an Ethereal rip-off. Which has had this functionality for at least two years.
Has anyone on the list actually gotten it to work?
I installed it at several places on my network, just to play around. And even it situations where I'm pretty certain Ethereal sees the calls just fine, nothing gets reported by this program.
If you are using ethernet switches, it won't see the rtp traffic.
I ran it on the egress interface on a Linux router that passes my phone traffic off to the world.
That's what I meant by saying that in that same scenario, Ethereal works just fine for sniffing the VoIP traffic, so I would expect Voipong to work there as well.
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