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Setup the NAT router:
When the VoIP gateway or computer behind the NAT router, normal web surfing and
email will not know the difference, but some communication services using ports other
then the normal web ports (ports are like door ways to your computer and for security
the communication has the abnormal ones closed and locked but the normal ones
open like the web surfing port 80). It must enable the DMZ (Demilitarized Zone)
function or setup the Port Forwarding(or called Virtual Server), let the communication
traffic can pass through the router.
A. DMZ Setup
1. Enter the NAT router configuration by web browser or software utility.
2. Locate the DMZ function and enable it
SP888B Broadband Router Screen Shot
DMZ
In computer networks, a DMZ (demilitarized zone) is a computer host or small network
inserted as a "neutral zone" between a company's private network and the outside
public network. It prevents outside users from getting direct access to a server that has
company data. (The term comes from the geographic buffer zone that was set up
between North Korea and South Korea following the UN "police action" in the early
1950s.)
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