I have a problem with NATed UACs in my setup. Therefor i would like to know where SER takes the public IP of a NATed UAC from, a request is forwarded to (using the reply handler) if i call fix_nated_contact() to rewrite the NATed UACs contact header. Is it always taken form the received field in the location record?

Just for explanation: It seems that my SER does not rewrite the contact header field in the reply route when i call fix_nated_contact(). The contact header value stays the same, just before and after call to fix_nated_contact(). So i think, it could be SER does not get the correct "NAT"-information for the related enpoint and the reads a value from a request field? Anyone ever encountered a similar situation? Is there a way to get closer information on what's happening when calling fix:nated_contact() during runtime?