VoIP trafic between subnetworks

[Valentin Minin]

I am trying to replace old ISA server by Zero Shell 3.8.2.
I have created one interface for internal network with static IP address 192.168.0.250/24 on eth0 and four subinterfaces with different VlanID at eth1 (192.168.6.1/24 at ett1.500, 192.168.7.1/24 eth1.502, 192.168.8.1/24 eth1.503 and ppp connection on eth1.530 for ISP). Internet and routing of big number of services is working OK but when i’m trying to call by SIP phone between networks – I can listen a person from other side but he can’t listen to me.
I have thought about NAT betwen this subnets but in the NAT interfeces I have selected only ppp0.
What do i change in the ZeroShell config for correcting this trouble?

[fulvio]

Are you using a STUN server on you SIP devices?

[Valentin Minin]

No, I use Panasonic PBX SIP/IP telephone exchange and SIP / IP phones without STUN servers. When I use routing via MS ISA / Cisco – I haven’t this problem.

[Valentin Minin]

I have sniffed traffic by WireShark and found mark of NAT (destination IP was a router IP).
After then I rebooted the ZeroShell router and routing is become to transparent mode.
Now it works.

[Author]

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