> On 10 Feb 2021, at 21:01, Juha Heinanen <jh@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
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