[asterisk-dev] VoIP Encryption

[James Harper]

> Does anyone know any open source or tools to encrypt the VoIP packets
> (Singnaling/RTP)? Becuase some ISPs  they are interpting the Voice
> packets.
> so i we will use the encryption it will be very hard for him to know
the
> packets.
> 
> Already i tried with openVPN but the quality is still bad and the ISP
> interption is there.
> 
> I will be appricaite if anyone can tell me the tools or library to
encrypt
> the packets.

Some of the problems you will have to overcome are:
. encryption and tunnel overheads will add latency
. encryption can be computationally expensive
. you will almost certainly break re-invites, which is one of the main
points of SIP and could mean your packets go the long way around

IPSEC with all possible end points participating might be the best way
to go.

But in the end, all the ISP has to do is add encrypted packets to their
list of packets to futz.

Does anyone know what ISP's are doing to make foreign VoIP unusable on
their networks? Introducing artificial jitter would do the trick, but
might make for a lot of work on their routers.

James