On Wed, 2009-01-07 at 16:17 +0100, Victor Pascual Ávila wrote:

> > If it breaks these rules, it is no longer acting as a proxy.
> 
> When a caller is behind a NAT, rewriting SDP in INVITE to include an
> RTP relay's address in it is a pretty common practice.
> Leaving RFC3261 fundamentalism aside-- do we consider it then still
> legitimate enough to call it a "SIP proxy"?

To be fair to your customers, call it a "SIP Proxy*" with an explanation
for the '*', or "A SIP Proxy with additional NAT Traversal
functionality".  That's what we're doing at the sipXecs project (which
is based around a true proxy that now has the ability to mangle SDP for
NATs, but since we can turn that off we still call it a proxy).



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