User's Manual

C HAPTER 5 | Gateway Configuration
NAT
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◆ Server IP – The IP address of the L2TP server, as specified by the
service provider.
◆ Username – Enter your user name for connecting to the L2TP service,
as supplied by the service provider. (Range: 1-20 characters; Default:
No name)
◆ Password – Specify the password for your connection, as supplied by
the service provider. (Range: 1-20 characters; Default: No password)
DNS DNS (Domain Name System) server addresses are usually provided by
service providers, however if you want to specify certain servers, the DNS
page enables you to enter primary and secodary DNS addresses.
Figure 26: DNS Settings
The following parameters are displayed on this page:
◆ Domain Name Server (DNS) Address – Address of the primary DNS
server, specified in the form of 0.0.0.0. (The default address 0.0.0.0
disables the manual DNS setting.)
◆ Secondary DNS Address (optional) – Optional address of a
secondary DNS server, specified in the form of 0.0.0.0.
NAT
Network Address Translation (NAT) is a standard method of mapping
multiple "internal" IP addresses to one "external" IP address on devices at
the edge of a network. For the RG231, the internal (local) IP addresses are
the IP addresses assigned to local PCs by the DHCP server, and the
external IP address is the IP address assigned to the WiMAX interface.
PORT MAPPING Using the NAT Port Mapping feature, remote users can access different
servers on your local network using your single public IP address.
Remote users accessing services such as web or FTP at your local site
thorugh your public IP address, are redirected (mapped) to other local
server IP addresses and TCP/UDP port numbers. For example, if you set
Type/Public Port to TCP/80 (HTTP or web) and the Private IP/Port to
192.168.7.9/80, then all HTTP requests from outside users forwarded to