You are very welcome! Glad it helped someone.
-- Sent from mobile. Apologies for brevity and errors.
-----Original Message----- From: Amar Tinawi amar.tinawi@gmail.com To: "Kamailio (SER) - Users Mailing List" sr-users@lists.kamailio.org Sent: Thu, 06 Sep 2018 3:55 PM Subject: Re: [SR-Users] Kamailio with CGNAT
Just to share knowledge and close this case
the problem was due to the size value of this packet which is 1514 byte and it wasn't fragmented well, or never fragmented
reducing the mtu value of the wan device (home router) solve the case which led to the necessary of reducing sip packet size
those two tutorials help alot : Thanks Alex Balashov http://www.evaristesys.com/blog/sip-udp-fragmentation-and-kamailio-the-sip-h... https://200ok.info/2017/03/31/sip-and-fragments/
Thanks All