[asterisk-users] client-server encryption

[iscario at free.fr]

Hi,

I'm trying to set up a "secure" VoIP channel between a Windows softphone client
and an Asterisk 1.6... server running with  OpenBSD. By "secure" I mean to
prevent any man in the middle to reconstitute any vocal exchange nor
sender/addressee/any header data/ of the VoIP call (in first step, I would be
glad to secure vocal data ans see later for the header...)

I had a look to several way to do that:

- Create a VPN using OpenVPN
    => impossible for me , i'm not admin of the Windows system.

- Create a SSH tunnel from the Windows client to the Asterisk server using putty
(redirecting ports used for VoIP)
    => it doesn't work because either SIP/RTP or IAX2 protocol are based on UDP
so that SSH tunneling isn't working....

- Use IAX2 protocol to communicate (because I was told it was able to encrypt
data)
    => it doesn't work because none of the client I had support encryption (many
deal with authentication encryption but not stream data)... Do you know a client
which could do that ?


Now I tried all of this, I do not have other idea... Do you have any ? Each clue
is very welcome!

Thanks.