Hi,

i am using Kamailio as an outbound proxy for Translating between TLS (public network) and UDP (internal network). When testing with a client, that uses a SIPS scheme, i've noticed the following behaviour, which broke my setup:

Due to the sips:-URI in the Request URI and the two different interfaces (UDP and TLS), the RR module adds two new Record-Route headers like this:

Record-Route: sips:mt@46.101.100.26:5061;transport=tls;r2=on;lr=on;ftag=7BABD31B-59F04202000E785C-AD96E700;rm=1;did=f81.f88 Record-Route: sips:mt@46.101.100.26;r2=on;lr=on;ftag=7BABD31B-59F04202000E785C-AD96E700;rm=1;did=f81.f88

This however breaks the internal routing, as the server is internally only reachable via UDP and not via TLS, as the internal network components only have UDP interfaces.

Is this a bug? I've temporarily created a workaround, so RR will always use "sip" instead of "sips" (which solved my issue), but I wonder if this in general should be considered a bug???

Thanks, Carsten