[asterisk-users] Re: NAT: RTP Path Optimization

[Patrick Cervicek]

Benny Amorsen schrieb:
>>>>>>"PC" == Patrick Cervicek <patrick at cervicek.de> writes:
> 
> 
> PC> http://lisas.de/~patrick/temp/rtp-optimierung.png Everything is
> PC> working fine in my Setup, but I want Extern1 to talk to Extern2
> PC> directly whitout going over Asterisk as the uplink is slow.
> 
> PC> When I set for Extern1/2 canreinvite=yes it works, but
> PC> "Intern-2-Extern" doesn't work because Asteisk gives out the
> PC> private IP-Adresses of Int1/2
> 
> Asterisk can't give out a public IP-address for Int1/2. Where
> would it get one from?

Asterisk gives out his own public adress and stays in the Media-Path 
between internal and external Phones. This avoids NAT-Problems.

> PC> I defined localnet=10.0.0.0/255.0.0.0 (Private LAN) but this
> PC> doesn't help.
> 
> PC> Ideas, how to handle "Extern-2-Extern" (RTP bypass Asterisk)? Do I
> PC> have to adjust "nat" somwhere?
> 
> Set canreinvite to no for Int1/2.

But then all RTP Traffic of my internal phones will go over Asterisk. I 
want RTP to go "Peer-to-Peer".
==> "Intern-2-Intern" and "Extern-to-Extern" should go P2P and 
"Intern-2-Extern" should go over Asterisk, see picture