VPN

[Site 1:]

I've set up an IPSec connection between our main and branch office, which is working really great (and usually both ways).

On the main Site we have a IAX/ISDN/SIP Asterisk PBX.
Now I want to connect the phones in the branch office via the new super-cool IPSec tunnel  to our PBX.

Now the problem: Voice doesn't "arrive" at the main site. When I pick up the phone I can hear everything perfectly but I'm not heard at all. Is there some protocoll involved that's not routed?? My settings are fairly defaultish

Any ideas??

thanks hs

fyi a schematics of the setup:
Site 1: Domain: my.domain
           monowall v.1.231: IP 192.168.1.1
           specified authoritative DNS 192.168.9.1 for other.domain
           static route:  LAN, Net 192.168.9.0/24,  Gateway 192.168.1.1
           PBX: 192.168.1.3 (connected to the outside via IAX using SIP internally)

Site 2: Domain: other.domain
           monowall v.1.231:  IP 192.168.9.1
           specified auth. DNS 192.168.1.1 for my.domain
           static route:  LAN, Net 192.168.1.0/24, Gateway 192.168.9.1
           SIP phones "can't send sound)

Make sure you have a firewallrule to allow UDP trafic, VOIP uses UDP to send sound, and TCP for signaling.

via IPSec tunnel??

I don't think that's the problem IAX is working fine (via Softphone) and it's using UDP as well. Even spookier !!!

thx
hs

What do you have in your sip.conf?  Make sure the IP range of your remote site falls within the localnet.  When I first setup the phone over the VPN I had to modify the sip.conf or sip_nat.conf in trixbox to say:

localnet=192.168.0.0/255.255.0.0

This now includes my sites across the VPN tunnels.