Hi,

I have the following doubt on STUN Client.
A STUN Client, would establish a TLS connection with the STUN server
before sending Shared Secret Request(SSR).

Here, (i.e. after establishing TLS connection and before sending Shared
Secret Request,)
should the STUN Client verify the CERTIFICATE of the STUN server, with
its Certificate from the SAME certificate authority?

In other words, must a STUN client require a Certificate from the
Certificate Authority, used by the STUN server?

This is not very clear from the STUN draft
(ietf-behave-rfc3489bis-01.txt), which says:

   "The client opens up the connection to
   that address and port, and immediately begins TLS negotiation [2].
   The client MUST verify the identity of the server.  To do that, it
   follows the identification procedures defined in Section 3.1 of RFC
   2818 [5].  Those procedures assume the client is dereferencing a URI.
   For purposes of usage with this specification, the client treats the
   domain name or IP address used in Section 9.1 as the host portion of
   the URI that has been dereferenced."

Verification of the "identity of the server", following RFC 2815,,does
not require a Certificate according to my understanding.

It would be very helpful, if someone can throw some light on this.

Thanks in advance,
Prakash




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