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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>On a Linux system there is a limit of how many open TCP connections you have. Unless you have a crazy amount of endpoints you have to serve, TCP probably isn’t really worth it in my opinion.<br><br>Also did I also mention that TCP connections don’t really fix NAT issues?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch-users-bounces@lists.freeswitch.org] <b>On Behalf Of </b>Spencer Thomason<br><b>Sent:</b> Wednesday, May 8, 2013 8:31 AM<br><b>To:</b> FreeSWITCH Users Help<br><b>Subject:</b> [Freeswitch-users] TCP vs UDP SIP<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>Hello all,<br>In our deployments, Freeswitch is on a public IP with most user endpoints behind NAT. As the demand for BLFs has grown I've been forced to go to TCP due the NOTIFYs exceeding MTU. I've been reluctant to use TCP for SIP due to the increased overhead. Currently I force a registration expiry of 600 seconds and ping all NATed endpoints. I'm exploring the idea of switching all endpoints to TCP where available, ditching the options pings and dropping the registration expiration to 300 secs which should exceed the TCP connection timeout of almost every router I've seen. I was currious if anyone had an experience or could point out any caveats I might run into.<br><br>Thanks in advance,<br>Spencer<o:p></o:p></span></p></div></div></div></body></html>