[Asterisk-Users] PIX!!!!!

[Roy Sigurd Karlsbakk]

> When we first has the sip fixup enabled, it worked just as you 
> described. I think what what happening is as follows:
> 1. Phones are configured for NAT
> 2. Cisco PIX "handles NAT" by rewriting headers so the phone doesn't 
> appear to be NATted (for SIP proxies that may not support natted 
> devices)
> 3. Asterisk was expecting NAT headers because of nat=yes

FYI: I had to turn off the "NAT handling" in our Pix, since it didn't 
seem to work behind double NAT

roy