Chapter 5. Nat Setup - Draytek Vigor2500V Manual

5.2 NAT Setup
In the most common type of router installation, you use the NAT facility of the
router. The NAT-enabled router gets one (in Single ISP, PPPoE, PPPoA,
MPoA) globally re-routable IP addresses from the ISP and assigns private
network IP addresses defined by RFC-1918 to local hosts. The NAT-enable
router translates the private network addresses to such a globally routable IP
address so that local hosts can communicate with the router and access the
Internet. The Vigor router let you have three types of port mapping as follows:
Port Redirection
DMZ Host
Open Ports
In terms of the definition of RFC1918 for the private IP addresses, the users
apply the 192.168.1.0/24 to local network clients. e.g. you have three
computers located at different room and you assign three private addresses
to these three computers. You can access Internet from these three
computers because Vigor router can transform these three private IP
addresses to a single public IP address which you subscribed from your ISP.
The following is the setting path for this function.
NAT > Port Redirection
> DMZ Host
> Open Ports
> Well-Known Ports List
NAT
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