Hello, after some failures with uac_auth (uac_auth can't increase CSeq number, which is required by my provider) my provider maked me an testing access without autentification, but I still can't make calls with kamailio or openser. I can make calls with opensips, but I am still not chosen, which sip software to use in future (still using openser). This is a part of my configuration: route[6] { uac_replace_from("sip:556807505@as.xxxxxx.sk"); rewritehostport("122.33.44.200"); route(5); } When trying to sniff packets and diff them, I am still getting this from my kamailio server: U kamailio_ip:5060 -> client_ip:5060 SIP/2.0 500 I'm terribly sorry, server error occurred (6/SL). From: "Ondrej Jan" <sip:xxxxxx@xxxx>;tag=59427D6F-81E63720. To: <sip:xxxxx@xxxxx;user=phone>;tag=cc70c0fe52d7af0accfb78a94d592620.f69c. CSeq: 1 INVITE. Call-ID: 37cadcfb-f93b8e1d-431cdf6@xxxxxxxxxxx. Server: kamailio (3.0.2 (i386/linux)). Content-Length: 0. Logs are below. Any idea, what happening and why a default opensips configuration works and kamailio/openser don't? SAL [root@kamailio ~]# kamailio -DddE loading modules under /usr/lib/kamailio/modules_k/:/usr/lib/kamailio/modules/ Listening on udp: 123.123.242.20:5060 Aliases: udp: kamailio.xxxx.sk:5060 *: 123.123.242.20:* WARNING: no fork mode 0(2364) INFO: <core> [tcp_main.c:4150]: init_tcp: using epoll_lt as the io watch method (auto detected) 0(2364) INFO: usrloc [hslot.c:53]: locks array size 512 0(2364) INFO: <core> [udp_server.c:166]: INFO: udp_init: SO_RCVBUF is initially 112640 0(2364) INFO: <core> [udp_server.c:217]: INFO: udp_init: SO_RCVBUF is finally 262142 4(2368) INFO: ctl [io_listener.c:224]: io_listen_loop: using epoll_lt io watch method (config) 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: tm [t_fwd.c:1379]: ERROR: t_forward_nonack: no branches for forwarding 0(2364) ERROR: <core> [action.c:1269]: WARNING: too many recursive routing table lookups (101) giving up! 0(2364) ERROR: <core> [action.c:1269]: WARNING: too many recursive routing table lookups (101) giving up! 0(2364) ERROR: <core> [action.c:1269]: WARNING: too many recursive routing table lookups (101) giving up! 0(2364) BUG: tm [t_lookup.c:1556]: tm: t_unref: REQ_ERR DELAYED should have been caught much earlier for 0xb5a15490: 17 (hex 11) ^C 4(2368) INFO: <core> [main.c:788]: INFO: signal 2 received 3(2367) INFO: <core> [main.c:788]: INFO: signal 2 received 1(2365) INFO: <core> [main.c:788]: INFO: signal 2 received 2(2366) INFO: <core> [main.c:788]: INFO: signal 2 received 0(2364) ALERT: <core> [main.c:719]: child process 2365 exited normally, status=0 0(2364) ALERT: <core> [main.c:719]: child process 2366 exited normally, status=0 0(2364) ALERT: <core> [main.c:719]: child process 2367 exited normally, status=0 0(2364) ALERT: <core> [main.c:719]: child process 2368 exited normally, status=0 0(2364) INFO: <core> [main.c:734]: INFO: dont_fork turned on, living on 0(2364) NOTICE: <core> [main.c:679]: Thank you for flying kamailio