Thread: Voxalot port ?
View Single Post
Unread 02-21-2007, 03:16 AM   #6
ctylor
 
ctylor's Avatar
 
Join Date: Apr 2006
Location: Vancouver, BC
Posts: 296
Thanks: 94
Thanked 53 Times in 27 Posts
ctylor will become famous soon enough
Default

I think we should study what exactly the ISP or the University is doing when it is trying to block SIP. Is it only inbound 5060 being blocked, or outbound too? Doesn't the NAT port-shuffle tend to obfuscate the ports used anyway on the WAN side? Can't end users change their ATAs and IP phones from 5060 on the SIP port to something else? It would seem best to know how exactly universities and some ridiculous ISPs are blocking SIP before we can come up with effective workarounds.
ctylor is offline   Reply With Quote