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configuration, the NAT operates on a router connecting two networks together. One of these
networks (designated as inside) is addressed with either private or obsolete addresses that need to
be converted into legal addresses before packets are forwarded onto the other network (designated
as outside). The translation operates in conjunction with routing, so that NAT can simply be
enabled on a customer-side Internet access router when translation is desired.
NAPT (Network Port Address Translator) maps a single public address to one or many internal
addresses and all network IP addresses on the connected computers are local and cannot be seen by
the outside world.
NAT with Port Address Translation (NAPT) is an extension to NAT in that NAPT uses T CP/UDP
ports in addition to network addresses (IP addresses) to map many private network addresses to a
single outside address.
To enable the Network Address Translator:
1. In the horizontal menu bar of the
LAN
page, select
NAT
. The
NAT IPSec traverse
configuration
page appears (Figure 15).
Figure 15: NAT IPSec Traverse Configuration Page
2. Check
in
the
Enable NAT IPSec traverse
check box.
3. Click
Save Se ttings
.
