[SIPForum-techwg] SIPConnect and IP addresses in Via headers

[Scott Lawrence]

On Mon, 2006-11-20 at 11:26 -0500, Chris Sibley wrote:
> Hi Michael,
> 
> Sorry the delay in responding. Things have been pretty quiet on the list
> as-of-late, thus I haven't been checking for new messages very
> frequently.
> 
> That said, good observation! This didn't come up during the draft
> review, but I agree with you that the publicly routable address
> requirement should really only apply to the top-most Via: header. 
> 
> Assuming that no-one objects, I will make a note of this and add some
> clarifying text to a future release of the specification.

I think the same applies to any addresses in Record-Route headers.  If
the path is something like:

  UA ---- P1 ---- P2 ===== SP

where P1 and P2 are proxies within the enterprise and SP is the service
provider, then if P2 has added its public address in a Record-Route,
there is no reason why it should translate any Record-Route added by P1
to a public form (indeed, there is no reason why any public form need
exist).

--  
Scott Lawrence  tel:+1-781-938-5306;ext=162 or sip:slawrence at pingtel.com
  sipXpbx project coordinator - SIPfoundry    http://www.sipfoundry.org/sipX
  Chief Technology Officer    - Pingtel Corp. http://www.pingtel.com/