Netopia R2020 manual Local WAN IP Address 0.0 Remote IP Address

9-18 User’s Reference Guide

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■You can specify that this router will Initiate Connections, acting as a foreign agent (Yes), or only answer them, acting as a home agent (No).

■Tunnels are normally initiated On Demand; however, you can disable this feature. When disabled, the tunnel must be manually established through the call management screens.

■You can specify the Idle Timeout, an inactivity timer, whose expiration will terminate the tunnel. A value of zero disables the timer. Because tunnels are subject to abrupt termination when the underlying datalink is torn down, use of the Idle Timeout is strongly encouraged.

An alternate way to force a tunnel to stay up is to define a forced up scheduled connection for the profile. See “Scheduled connections” on page 8-7for more information.

■Return to the Connection Profile screen by pressing Escape.

■Select IP Profile Parameters and press Return. The IP Profile Parameters screen appears.

IP Profile Parameters

Address Translation Enabled:	Yes
NAT Map List...	Easy-PAT
NAT Server List...	Easy-Servers
Local WAN IP Address:	0.0.0.0
Remote IP Address:	173.167.8.10
Remote IP Mask:	255.255.0.0
Filter Set...
Remove Filter Set
Receive RIP:	Both

Enter a subnet mask in decimal and dot form (xxx.xxx.xxx.xxx).

■Enter the Remote IP Address and Remote IP Mask for the host to which you want to tunnel.

Note: A peculiarity associated with VPNs is that when a foreign agent has NAT applied to a Connection Profile set for ATMP data link encapsulation, the home agent and devices behind it, cannot Ping the foreign agent's tunnel end-point IP address. This is because ICMP packets have no port association, and thus will be discarded rather than being processed by NAT.

Ordinarily, Ping is an excellent troubleshooting tool, but it will not be effective in this circumstance. Instead, use another TCP- or UDP-based network service for troubleshooting. Since the Netopia Router is capable of serving Telnet and HTTP, we recommend using these services instead of Ping.