[VOIPSEC] sdescriptions interop testing -- looking for implementations

[Per Cederqvist]

Per Cederqvist <ceder at ingate.com> writes:

> Does anybody here have a pointer to any product or program that 
> implement sdescriptions?  We at Ingate Systems have recently 
> implemented support in our SIP-aware firewalls for transcoding SIP 
> calls between SRTP (negotiated via sdescriptions) and plain RTP, and 
> we would like to do some interop testing.
>
> Drop me a line if you have a SIP client, voicemail server, or any 
> other kind of SIP system that understands sdescriptions, and are 
> willing to test it (via the Internet) against our implementation.  I 
> will summarize to the list (unless you ask me not to be included in 
> the summary).

The only vendor that responded and had an implementation ready for
test was Snom.  Ahmar Ghaffar of Snom and myself have now concluded
successful interop testing between a Snom 360 phone and an Ingate
Firewall 1400.  We ran SRTP over the internet.  The Ingate Firewall
transcoded it to unencrypted RTP and sent it to a Cisco 7960 phone
(that, to my knowledge, don't support SRTP).

If anybody else wants to perform Interop testing with the Ingate
Firewall or Ingate SIParator, just drop me a line.  I also have an
Ethereal trace of the call setup and teardown (including the first and
last few SRTP packets, with the corresponding clear-text RTP packets
on the LAN).  To help others implement SRTP with sdescriptions I am
prepared to send them to anybody that is interested, so that you can
use them as test vectors for your implementation.

Ahmar Ghaffar also asked me to say that Snom is available if anybody
wants to do interop testing with them.  You can contact him via email
to ghaffar at snom.de.

The complete line of Snom products that supports SRTP is snom320,
snom360 and snom300.

    /ceder
-- 
Per Cederqvist <ceder at ingate.com>, Chief Architect, Ingate Systems AB