Hello, I have experienced some crashes in the topoh module when someone ran a scanner against the SIP server. Log and backtrace below (I've changed the server ip to 192.168.31.45 intentionally). Note: I'm not using local ip as topoh mask_ip. version: kamailio 3.1.0 (i386/linux) Dec 14 06:22:47 localhost /usr/local/sbin/kamailio[32348]: INFO: <script>: [152309] REGISTER sip:abdol@192.168.31.45 From:sip:abdol@192.168.31.45,tag=6162646f6c0131323538353537353239 To:sip:abdol@192.168.31.45,tag=<null> Call-ID:2502699686 Cseq:1 Contact:sip:abdol@192.168.31.45 <219.237.209.148:5063> Dec 14 06:22:47 localhost /usr/local/sbin/kamailio[32347]: INFO: <script>: [151941] REGISTER sip:abdul@192.168.31.45 From:sip:abdul@192.168.31.45,tag=616264756c01353930353937393039 To:sip:abdul@192.168.31.45,tag=<null> Call-ID:3690987863 Cseq:1 Contact:sip:abdul@192.168.31.45 <219.237.209.148:5063> Dec 14 06:22:47 localhost /usr/local/sbin/kamailio[32341]: ALERT: <core> [main.c:744]: core was generated Core was generated by `/usr/local/sbin/kamailio -P /var/run/kamailio.pid'. Program terminated with signal 11, Segmentation fault. #0 0x00dc05ac in th_skip_msg (msg=0xbfced200) at th_msg.c:1043 1043 if((get_cseq(msg)->method_id)&(METHOD_REGISTER|METHOD_PUBLISH)) (gdb) bt #0 0x00dc05ac in th_skip_msg (msg=0xbfced200) at th_msg.c:1043 #1 0x00dc1066 in th_msg_received (data=0xbfced5fc) at topoh_mod.c:198 #2 0x080864d5 in sr_event_exec (type=1, data=0xbfced5fc) at events.c:87 #3 0x080c1a3d in receive_msg ( buf=0x8276720 "ACK sip:aarti@192.168.31.45 SIP/2.0\r\nVia: SIP/2.0/UDP 219.237.209.148:5063;branch=z9hG4bK-2573018079;rport\r\nContent-Length: 0\r\nFrom: \"aarti\"<sip:aarti@192.168.31.45>; tag=616172746901313238373537393"..., len=399, rcv_info=0xbfced6ec) at receive.c:117 #4 0x0813580e in udp_rcv_loop () at udp_server.c:532 #5 0x08098f43 in main_loop () at main.c:1554 #6 0x0809b62d in main (argc=3, argv=0xbfced9b4) at main.c:2398 Core was generated by `/usr/local/sbin/kamailio -P /var/run/kamailio.pid'. Program terminated with signal 11, Segmentation fault. #0 0x00dc05ac in th_skip_msg (msg=0xbfced200) at th_msg.c:1043 1043 if((get_cseq(msg)->method_id)&(METHOD_REGISTER|METHOD_PUBLISH)) (gdb) bt #0 0x00dc05ac in th_skip_msg (msg=0xbfced200) at th_msg.c:1043 #1 0x00dc1066 in th_msg_received (data=0xbfced5fc) at topoh_mod.c:198 #2 0x080864d5 in sr_event_exec (type=1, data=0xbfced5fc) at events.c:87 #3 0x080c1a3d in receive_msg ( buf=0x8276720 "ACK sip:abdenace@192.168.31.45 SIP/2.0\r\nVia: SIP/2.0/UDP 219.237.209.148:5063;branch=z9hG4bK-2970175437;rport\r\nContent-Length: 0\r\nFrom: \"abdenace\"<sip:abdenace@192.168.31.45>; tag=616264656e61636501"..., len=422, rcv_info=0xbfced6ec) at receive.c:117 #4 0x0813580e in udp_rcv_loop () at udp_server.c:532 #5 0x08098f43 in main_loop () at main.c:1554 #6 0x0809b62d in main (argc=3, argv=0xbfced9b4) at main.c:2398 -- Sincerely, Andrew Pogrebennyk