<div>Hello all,</div><div><br></div><div>I've seen the matter of NAT traversal come up several times, but very few people go into detail about some of the specific problems and how/why they happen.</div><div><br></div>
<div>So today I spent a few hours doing a write up of an on-going problem we've had with the Cisco 7940 phones, and a variety of routers.</div><div><br></div><div>This article goes into quite a bit of detail, giving a breakdown of some of the specific problems we were having, and some of the ways you can resolve it.</div>
<div><br></div><div>Although not strictly FreeSWITCH related (despite the FS reference), I'm hoping that this write up will help others understand some of the NAT traversal problems;</div><div><br></div><a href="http://blog.simplicitymedialtd.co.uk/476/analysis-of-cisco-7940-sip-alg-and-nat-traversal-problems">http://blog.simplicitymedialtd.co.uk/476/analysis-of-cisco-7940-sip-alg-and-nat-traversal-problems</a><div>
<br></div><div>Thanks</div><div><br>Cal</div>