Hi,

Thanks. This implies that the peers then directly open a tcp connection and
SIP is transported over tls with that connection. 

UDP in that case can't be used, right ?

Within TLS, it may be neccessary to have a CA for certificates as an
enrollment server, right ?

Best Regards
Frédéric


-----Original Message-----
From: Eric Rescorla [mailto:[email protected]] 
Sent: Montag, 16. März 2009 17:32
To: Frédéric-Philippe Metz
Cc: [email protected]
Subject: Re: [P2PSIP] Question: Security issue resp. RELOAD and SIP usage
draft-ietf-p2psip-sip-00

At Sun, 15 Mar 2009 19:36:56 +0100,
Frédéric-Philippe Metz wrote:
> 
> Hi,
> 
> Since the connection is established end-to-end then without RELOAD, how
can
> you rely on - as the receiver of i.e. INVITE - that the identity of the
the
> .. let's say "message elements" such as "From"-Header ... is really the
> person providing this information ?

It's carried over a TLS connection, so you should have client auth.

-Ekr

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