[SR-Users] R-R to MS Teams Proxy

[Olle E. Johansson]

> On 10 Feb 2021, at 21:01, Juha Heinanen <jh at tutpro.com> wrote:
> 
> When request is sent from Kamailio to MS Teams SIP Proxy, the top R-R
> URI needs to contain FQDN of Kamailio SIP proxy instead of its IP
> address.  Document
> 
>  https://skalatan.de/de/blog/kamailio-sbc-teams
> 
> suggest to replace record_route(); call with
> 
>  record_route_preset("SBC-DNS-DOMAIN:5061;transport=tls", "SBC-IP-ADDR:5060");
> 
> That works only in a very simple case where the request came in over UDP
> or TCP and SIP Proxy has only one listening address, i.e., SBC-IP-ADDR.
> 
> One way to solve the problem might be a new r_r function that would take
> FQDN of the top R-R URI as argument or introduction of a pv from where
> the current record_route() function would take the FQDN if it has been
> set.
> 
> Any comments or other solutions?

This is needed for all TLS rr’s since we need to vallidate the cert 
with the FQDN.

/O