DI-304/DI-304M ISDN Remote Router
NAT Setup
Usually you will use the router as a NAT-enabled router. NAT stands for Network
Address Translation. It means the router gets one (in Single ISP, PPPoE, PPTP) or
two (in Dual ISPs mode) globally re-routable IP addresses from the ISP. Local hosts
will use private network IP addresses defined by RFC-1918 to communicate with
the router. The router translates the private network addresses to a globally routable
IP address that is then used to access the Internet. The following explains NAT
features for specific applications.
Click
NAT Setup
to open the setup page. On the page you will see the private IP
address definitions defined in RFC-1918. Usually we use the 192.168.1.0/24 subnet
for the router.
Configure Port Redirection Table
Exposing Internal Servers to the Public Domain
The Port Redirection Table may be used to expose internal servers to the public
domain or to directly assign a specific port number to internal hosts. External hosts
or domain can specify port numbers to access internal network services, such as FTP,
WWW, etc.
The following example shows how an internal FTP server is exposed to the public
domain. The internal FTP server is running on the local host addressed as
192.168.1.10.
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