[Asterisk-Users] NAT and only been able to have 1 SIP phone behind

[Eric Wieling aka ManxPower]

Anton Krall wrote:
> Guys.
> 
> Ive read on the wiki that a common problem with nat is that you can only
> have 1 sip phone behind, how do you get around this issue? Having a sip
> enabled router behind the nat like the GS 488 489 or 486? Or how have you
> done it without having any kind of linux box (SER or *) behind the nat.
> 
> The idea is to have 2 or more sip clients behind some NAT and been able to
> connect to a remote asterisk box.

I don't know why people think this.  Any router with PAT (Port Address 
Translation) should work with multiple SIP clients behind NAT.  Most 
routers support PAT (but may not call it that).