Firewall Checker

[petewatterschats]

Firewall Checker

Setup port forwarding, firewall checker gave errors on ports 9000-9255
every 21 port gave error "no response received or port mapping is closed - Port forwarding not configured correctly"

Ports 9256-9500 not checked by firewall checker

Use Liksys example as a guide for setting up port forwarding

 

[leejor]

How many ports you open in the 9000 range all depends on how many VoIP channels, and services, you plan on using. If it is a simple system, then you won't use all of them.

http://www.3cx.com/blog/docs/ports-used/

I just do 9000 to 9049 , which is sufficient (used to be the 3CX default a while ago) for basic VoIP traffic. I believe it is two channels per call.

Some ports may be "intercepted" by other processes running on your system.