[Asterisk-Users] A solution for SIP and NAT

[Andrew Radke]

Patrick wrote:
[snip]
> Hi John,
[snip]
> How about Asterisk and NAT? Can you please comment if the examples below
> also work.
> 
> 1x SIP phone <-> NAT box <-> Internet <-> NAT box <-> Asterisk
> 10x SIP phone <-> NAT box <-> Internet <-> NAT box <-> Asterisk

This all depends on the NAT boxes that you use. The SIP phone. Whether 
the call is going out from or into the SIP phone. Whether the SIP phone 
is registered with Asterisk ot just making a call to it. Etc.

> The SIP phone(s) and Asterisk server are on private IP addresses. The
> NAT boxes (e.g. adsl router) have a public IP address. Any requirements
> for the NAT boxes like being a SIP proxy?

Some brands of router will handle this virtually transparently 
especially if you register with the Asterisk calls and all conversations 
are directly with it.

> Thanks,
> Patrick

Regards,

Andrew Radke.