[VOIPSEC] How to test VoIP security

[Floris Jan Schepel]

Dear experts,

I am a IT student at TI Mon3aan, in the Netherlands, whit a work placement at Heerema.
My study here is to find out, how to secure VoIP.
Heerema will work whit a Cisco Avaya solution. A Cisco network, whit Catalyst 4506, 3560, and 2950 switches.
The VoIP environment will be Avaya, like the 8700 media servers, G650 Media gateways direct to ISDN, and Avaya IPphones.(H.323)

On a lot of sites, there are explanations how to secure a VoIP environment, but none of this sites, tell me how to test a VoIP environment. I am looking for a tool or a appliance, with I can test and log the security of this VoIP network. I like to use this tool or appliance on a test network.

I'ts not the purpose to knock (DoS) or Hack the VoIP network down. I have Google'd a lot and, checked the email list, but I have failed to find something usefull. I also have read a lot of VoIP books, like: "Switching to VoIP", and Carrier grade Voice over IP" but none of them gives me information of what I am looking for.

I hope, that you can help me, testing this VoIP environment without harming it.


Thanks for you help,
Floris