Hi, I also use is tcpdump with the command "tcpdump -i any -s 3000 -w /var/tmp/trace.pcap". You may also filter during the trace e.g. "tcpdump -i any -s 3000 -w /var/tmp/trace.pcap not port 22 and not port 3306". The next step for comfortable analyzing is to use sip-scenario which I have provided at https://www.dropbox.com/s/nqay103s2rmnffq/sip_scenario.v1.2.7.zip?dl=0 This tool produces a message-flow like the attached example. BR Franz From: sr-users [mailto:sr-users-bounces@lists.sip-router.org] On Behalf Of Daniel-Constantin Mierla Sent: Thursday, March 17, 2016 10:24 AM To: Kamailio (SER) - Users Mailing List &lt;sr-users(a)lists.sip-router.org&gt; Subject: Re: [SR-Users] for kamailio registration Search the net for ngrep, sngrep, sipgrep, tcpdump or wireshark -- all of them are open source tools that can be used for capturing the sip traffic. For ngrep, a good command to run on sip server is: ngrep -d any -qt -W byline "sip" port 5060 Cheers, Daniel On 15/03/16 16:44, Shiv Patidar wrote: For registration , we would like to see the complete traces at all nodes whoever processing UE sending REGISTER method. could you please let me know how can we check the logging at all IMS nodes? i am able to successfully register and got 200OK but i want understand what and all processing has been done by server? can't i see default messages with the way install step i followed i need this for test/development _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users(a)lists.sip-router.org <mailto:sr-users@lists.sip-router.org> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users -- Daniel-Constantin Mierla http://www.asipto.com http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda Kamailio World Conference, Berlin, May 18-20, 2016 - http://www.kamailioworld.com