the problem that I am experiencing might be a pretty simple for you. I have a local network, which consists of an ADSL modem (Allied Data CopperJet 1612), a DSL/Cable Firewall (Netgear Prosafe/Firewall FR3285) and a Netgear Gigabit switch. Also, I have purchased a range of dedicated IPs (8 IP Addresses).
In a local server, I have installed Asterisk PBX. All internal SIP phones work smoothly and call eachother without any problems. However, it is impossible to receive incoming calls from the service providers, which are declared in the system. I suppose that we have to create a route, which will get over the ADSL modem, the firewall and connect to the server.
How can I create such an route?
Thank you in advance.