Hello, On 23/08/14 11:47, Olli Heiskanen wrote: In failure_route the request is processed again, not the reply. You can use $T_rpl($si) to get the source ip of the reply inside a failure_route. But I think ds_is_from_list() doesn't take the IP as parameter. What you can do is to mark the transaction with a specific flag if you sent it via dispatcher. Then the replies should come from a dispatcher ip, so you just need to check if that flag is set in failure route. Cheers, Daniel -- Daniel-Constantin Mierla http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda Next Kamailio Advanced Trainings 2014 - http://www.asipto.com Sep 22-25, Berlin, Germany