[Asterisk-Users] Known SIP - NAT Solutions?

[Jim Gottlieb]

On 2003-03-05 at 15:08, you wrote:

> I would like to put these SIP phones into are behind NAT.

I was quite surprised when I tested Vonage's service that I could plug
in their ATA 186 behind my NAT/VPN box and it immediately worked, even
for incoming calls.

They must make an outbound connection and hold it open for the incoming
calls that occur.  Assuming this is standard SIP stuff, I wonder if
Asterisk does or could support this type of registration/setup.