Quote Originally Posted by jlachowin View Post
Isn't putting the ATA in the DMZ just opening the ATA to the internet or does it allow other devices at risk?
Correct, it just allows the ATA to be exposed to the internet. Some newer routers limit the exposure so that's it is not true DMZ. I run my ATA behind my router since my router will forward the necessary ports automatically and still let me have my firewall enabled. In most cases, I actually think you are more secure with your ATA in front of the router and have your router firewall enabled. Most routers with an ATA behind requires the firewall on the router to be disabled. As long as the ATA has a strong password and is changed routinely (something VOIPo does do) you are not at much risk with the ATA in front of your router.