Nat Combination Application; Ip-Passthrough - Motorola 2200 Administrator's Handbook

Administrator's Handbook
Internet
You can also use the LAN-side address of the Gateway, 192.168.1.x to access the web and telnet server.

NAT Combination Application.

sophisticated LAN layout that uses both the Pinhole and Default Server capabilities.
With this topology, you configure the embedded administration ports as a first task, followed by the Pin-
holes and, finally, the NAT Default Server.
When using both NAT pinholes and NAT Default Server the Gateway works with the following rules (in
sequence) to forward traffic from the Internet to the LAN:
If the packet is a response to an existing connection created by outbound traffic from a
1.
LAN PC, forward to that station.
If not, check for a match with a pinhole configuration and, if one is found, forward the
2.
packet according to the pinhole rule.
If there's no pinhole, the packet is forwarded to the Default Server.
3.

IP-Passthrough.

Your Gateway offers an IP passthrough feature. The IP passthrough feature allows a
single PC on the LAN to have the Gateway's public address assigned to it. It also provides PAT (NAPT) via
the same public IP address for all other hosts on the private LAN subnet. Using IP passthrough:
•
The public WAN IP is used to provide IP address translation for private LAN computers.
•
The public WAN IP is assigned and reused on a LAN computer.
90
Gateway
WAN
Ethernet
Interface
LAN
210.219.41.20
Ethernet
Interface
NAT
Embedded
NAT Default
Web Server
Server
210.219.41.20
(Port 80 default)
Motorola Netopia®'s NAT security feature allows you to configure a
LAN STN #3
192.168.1.3
LAN STN #2
192.168.1.2
NAT protected
NAT Default Server
192.168.1.1