[asterisk-users] Sipgate trunk doesn't bridge with other trunk, but works with local extensions

[Sebastian Arcus]

On 02/10/11 21:11, Sebastian Arcus wrote:

>>
>> Everything is working fine, except bridging between the sipgate and
>> voipcheap trunks. I'll explain:
>>
>>
>> SNIP
>>
>> What kind of firewall are you using?

SNIP

Just a follow up. I've opened up udp ports 10000-20000 on the Linux box 
(where Asterisk is) and now I have sound. However, bear in mind that the 
Netgear router/modem which is connected to the Internet (the 
Linux/Asterisk box is behind it, in a private lan) does *not* have any 
forwarded ports whatsoever, or DMZ setup. So it is a mystery to me how 
the Linux box needs ports open, while the Netgear router doesn't.

I'd love to know the explanation, and maybe a way to make iptables work 
without fully opening 10000 ports - if anybody here knows.

Thank you,

Sebastian