Hello Kamailions, Im trying to setup registration replication with the use of the dmq and dmq_usrlog modules. I have configured two servers, configured kamailio on both. When I register a sip client on the one I get a nice KDMQ message on the second server, but the second server reacts with a 404 not found: U 2018/12/17 05:08:38.974495 10.10.0.1:6000 -> 10.10.0.2:6000 #3 KDMQ sip:usrloc@10.10.0.2:6000 SIP/2.0. Via: SIP/2.0/UDP 10.10.0.1:6000;branch=z9hG4bK00ed.e1666b85000000000000000000000000.0. To: <sip:usrloc@10.10.0.2:6000>. From: <sip:usrloc@10.10.0.1:6000>;tag=a2652bb825a097f3b7285d4c70edd51a-0513. CSeq: 10 KDMQ. Call-ID: 35571d0247178282-3780(a)10.88.77.172. Content-Length: 360. User-Agent: kamailio (5.1.6 (x86_64/linux)). Max-Forwards: 1. Content-Type: application/json. . {"action":2,"aor":"test01@10.88.77.172","ruid":"uloc-5c177363-ec4-1","c":"sip:test01@10.88.77.140:59293;ob","received":"","path":"","callid":"zjucvmzUT2hNJCIfqeUXEsOaEzyHCs-4","user_agent":"CSipSimple_G3121-26/r2457","instance":"","expires":1545041786,"cseq":24435,"flags":0,"cflags":0,"q":-1,"last_modified":1545040886,"methods":8159,"reg_id":0,"server_id":0} U 2018/12/17 05:08:38.979062 10.10.0.2:6000 -> 10.10.0.1:6000 #4 SIP/2.0 404 Not Found. Via: SIP/2.0/UDP 10.10.0.1:6000;branch=z9hG4bK00ed.e1666b85000000000000000000000000.0;rport=6000. To: <sip:usrloc@10.10.0.2:6000>;tag=02f7a7b91eadf5e07797231cb2f64326-b794. From: <sip:usrloc@10.10.0.1:6000>;tag=a2652bb825a097f3b7285d4c70edd51a-0513. CSeq: 10 KDMQ. Call-ID: 35571d0247178282-3780(a)10.88.77.172. Server: kamailio (5.1.6 (x86_64/linux)). Content-Length: 0. . I think I have to configure a bit more than just the parameters of the dmq and dqm_usrloc modules. Ive googled, looked in the Sip routing with kamailio book, but no luck. Did not see any examples in the kamailio source, with regards to the dmq_usrloc module. I am not looking for direct answers, have not provided you with enough information for that, but I would appreciate information on how to correctly configure registration replication using the dmq/dmq_usrloc module... Thank you. With regards, Gertjan