[Users] Call-ID discrepancy

[Mike Williams]

On Wednesday 24 May 2006 07:01, Daniel-Constantin Mierla wrote:
> > I notice that during a dialog session from a UA to the server going to
> > the PSTN gateway, it was refering to this Call-ID until the point when
> > the request was forwarded to the PSTN gateway. When the PSTN gateway
> > replies, it replied with a same Call-ID with a different IP address at
> > the back (9ce97fd3-1a800040 at 123.234.123.234
> > <mailto:9ce97fd3-1a800040 at 123.234.123.234> )
>
> That is very wrong. Maybe there is an ALG in the path which replaces the
> private address with public ones, but that should not apply to the
> call-id. The caller should reject the reply.

I have actually seen an ALG do exactly that before, and my client dropped all 
messages coming back through it, as expected. 

---Mike