[Asterisk-Users] SIP and NAT - best practices?

[Leo Ann Boon]

Trevor G. Hammonds wrote:

>How about when you have four or five SIP devices at a single location?  Do
>you manually assign each phone a separate port and add firewall/router
>rules?  I am looking for an inexpensive device or method that will allow
>this happen automatically.  Rather than going that route, my current
>solution is to put an Asterisk server at the client's location to handle the
>SIP clients and do an outbound trunked IAX connection back to the main
>server.  
>  
>
Use an outbound proxy either a stanadlone appliance like ix-66 or you 
can build one using Siproxd running on your Linux gateway.
http://siproxd.sourceforge.net/

There's a WIP port of siproxd to OpenWRT so you can run it on a Linksys 
WRT54G.