Motorola Netopia 3342N - Manual (Page 90)

Administrator’s Handbook
90
You can also use the LAN-side address of the Gateway, 192.168.1.x to access the web and telnet ser ver.
NAT Combination Application. Motorola Netopia®’s NAT security feature allows you to configure a
sophisticated LAN layout that uses both the Pinhole and Default Ser ver capabilities.
With this topology, you configure the embedded administration por ts as a first task, followed by the Pin-
holes and, finally, the NAT Default Ser ver.
When using both NAT pinholes and NAT Default Ser ver the Gateway works with the following rules (in
sequence) to for ward traffic from the Internet to the LAN:
1.
If the packet is a response to an existing connection created by outbound traffic from a
LAN PC, forward to that station.
2. If not, check for a match with a pinhole configuration and, if one is found, forward the
packet according to the pinhole rule.
3. If there’s no pinhole, the packet is forwarded to the Default Server.
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.
WAN
LAN
Ethernet
Interface
192.168.1.3
192.168.1.2
192.168.1.1
LAN STN #3
LAN STN #2
NAT Default Server
Gateway
NAT
NAT Default Embedded
Web Server
210.219.41.20
210.219.41.20
(Port 80 default)
NAT protected
Ethernet
Interface
Internet
Server