I thought I knew everything I needed to know about firewalls, NAT, and SIP, but apparently not...
I have a Sipura 1001 connected to a DLink DI-514 Router. I've assigned the Sipura a static IP address, and placed it in the "DMZ" section of the DLink so that it's exposed directly to the internet. I then configured the Sipura to use NAT, and an STUN server. When I place outbound calls, everything works fine. When I take an inbound call, everything works except for _outbound_ audio. This seems very odd to me, as I would only ever expect to have a problem with inbound audio... I've followed the Sipura ATA user guide to the T (http://www.sipura.com/Documents/SipuraSPAUserGuidev2.0.9.pdf, section 4.13.1 example 2). Before I build myself a packet sniffer out of a spare PC, anyone have some wisdom to share? Cheers, Simon
