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10-6 User’s Reference Guide
When using numbered interfaces, the Netopia Router will use its local WAN IP address and subnet mask to
send packets to the remote router. Both routers have WAN IP addresses and subnet masks associated
with the connection.
6. If your ISP uses unnumbered (system-based) routing, select Remote IP Address and enter the IP address
your ISP gave you. Then select Remote IP Mask and enter the IP subnet mask of the remote site you will
connect to.
Note: When using unnumbered interfaces, the Netopia Router will use either its local Ethernet IP address
or its NAT (Network Address Translation) address (if so configured) and subnet mask to send packets to the
remote router. Neither router has a WAN IP address or subnet mask associated with this connection. These
default addresses will request that the remote router dynamically assign an address at the time the
connection is made.
7. When your Netopia R7200 connects to the ISP, the remote router assigns your Netopia R7200 an IP
address that external users use to communicate with your network.
The following Quick View screen shows an example in which 192.168.100.6 is assigned to the Netopia
R7200. “NAT” indicates that the address was assigned dynamically by Network Address Translation.
Internal users can access the Internet as they always do; the external Internet, however, views all traffic from
the internal network as originating from 192.168.100.6 and all traffic your network receives is addressed to
192.168.100.6.
Associating port numbers with nodes
When an IP client such as a Netscape Navigator or Microsoft Internet Explorer wants to establish a session with
an IP server such as a Web server, the client machine must know the IP address to use and the TCP service
port where the traffic is to be directed.
For example, a Web browser locates a Web server by using a combination of the IP address and TCP port that
the client machine has set up.
Quick View 12/11/1998 12:45:44 PM
Default IP Gateway: 0.0.0.0 CPU Load: 2% Unused Memory: 952 KB
Domain Name Server: 0.0.0.0
Domain Name: None Provided LocalTalk Address: 34448:149
----------------MAC Address--------IP Address-------IPX Address---EtherTalk---
Ethernet Hub: 00-00-c5-70-03-48 192.168.1.1 34449:150
SDSL WAN1: 00-00-c5-70-03-4a 0.0.0.0
Current DSL Status
Profile Name----------Rate--%Use-Remote Address-----Est.-More Info------------
ISP P1 10% IP 92.163.4.1 Lcl NAT 192.168.100.6
LED Status
PWR-+-----WAN1------+--CON--AUX--+-----WAN2------+--EN--+--------LEDS---------
LNK RDY CH1 CH2 LNK LNK LNK RDY CH1 CH2 DATA | '-'= Off 'G'= Green