Wellink Corporation NEOBIT1014VA User Manual
Chapter8
NEOBIT 1014VA ADSL Router User’s Guide
the public IP address as the destination IP address and the
disguised source port number. The NEOBIT 1014VA changes the
IP address and source port number back to the original values
(having kept track of the changes it made earlier), and then routes
the packet to the originating computer.
disguised source port number. The NEOBIT 1014VA changes the
IP address and source port number back to the original values
(having kept track of the changes it made earlier), and then routes
the packet to the originating computer.
NAT rules such as these provide several benefits:
They eliminate the need for purchasing multiple public IP
addresses for computers on your LAN. You can make up
your own private IP addresses at no cost, and then have
them translated to the public IP address when your
computers access the Internet.
your own private IP addresses at no cost, and then have
them translated to the public IP address when your
computers access the Internet.
They provide a measure of security for you LAN by
enabling you to assign private IP addresses and then have
these and the source port numbers swapped out before
your computers access the Internet.
these and the source port numbers swapped out before
your computers access the Internet.
The type of NAT function described above is called network
address port translation (napt). You can use other types, called
flavors, of NAT for other purposes; for example, providing outside
access to your LAN or translating multiple private addresses to
multiple public addresses.
address port translation (napt). You can use other types, called
flavors, of NAT for other purposes; for example, providing outside
access to your LAN or translating multiple private addresses to
multiple public addresses.
By default, NAT is enabled, with an napt rule configured that
translates any private address on the LAN side to your ISP-
assigned public IP address on the WAN side. For a description of
napt rules, see page 68.)
translates any private address on the LAN side to your ISP-
assigned public IP address on the WAN side. For a description of
napt rules, see page 68.)
Viewing NAT Global Settings and Statistics
To view your NAT settings, log into Configuration Manager, click the
Services tab. The NAT Configuration page displays by default, as
shown in Figure 26.
Services tab. The NAT Configuration page displays by default, as
shown in Figure 26.
Figure 26. NAT Configuration Page
The NAT Configuration page contains the following elements: