it is simple way to solve this and it is softphone product problem. If i did configuration as you said , it consumes so much socket , CPU and etc. in future. I wonder that is there a something about it on ietf or protocol flows. I think it is wrong. What do you think about it. Thanks for reply , Daniel. -- View this message in context: http://sip-router.1086192.n5.nabble.com/NatHelper-Received-adding-on-Contac… Sent from the Users mailing list archive at Nabble.com.

Hello;     Our goal is 100k subscriber and i know that Asterisk cannot handle 3k subscriber that sending options to keep open ports. So this situation is afraid of me. Yeah ,You re right, dont trust endpoints. I think UAc keep-alive mechanism can solve this. This is UAC's problem  :)  I will just warn UAC production. Thanks for reply. Have a nice day.Cheers. 3.10.2016 16:19 tarihinde Daniel Tryba-2 [via SIP Router] yazdı: On Mon, Oct 03, 2016 at 03:35:59AM -0700, ycaner wrote: &gt; it is simple way to solve this and it is softphone product problem. If i did &gt; configuration as you said , it consumes so much socket , CPU and etc. in &gt; future. I can't imagine this will be a significant amount of cpu/traffic. I can only speak for my users, but near 100% is behind NAT or a statefull firewall. Treating the users as always NATed avoids a lot of headaches so far.   &gt; I wonder that is there a something about it  on ietf or protocol flows. I &gt; think it is wrong. &gt; &gt; What do you think about it. I can't find any info about this learning process via the Contact header. But I have seen this kind of behavior with Patton SmartNode equipment, in these appliances this learning is related to the UACs keep-alive mechanism. This further supported my idea to never trust any endpoint device :) _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list [hidden email] http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users If you reply to this email, your message will be added to the discussion below: http://sip-router.1086192.n5.nabble.com/NatHelper-Received-adding-on-Contac… To unsubscribe from NatHelper - Received adding on Contact header, click here . NAML -- yasin-imza-2016.jpg (23K) <http://sip-router.1086192.n5.nabble.com/attachment/152257/0/yasin-imza-2016.jpg> -- View this message in context: http://sip-router.1086192.n5.nabble.com/NatHelper-Received-adding-on-Contac… Sent from the Users mailing list archive at Nabble.com.