Nortel Networks 620 User Manual

Configuration via Local Pages

E-DOC-CTC-20051017-0169 v0.1

Type

The Type parameter determines which 

 type is selected.

Either dhcp or nat can be selected.

Selecting dhcp has the effect that the virtual IP address attributed by the VPN 
server to the SpeedTouch™ VPN client is effectively assigned to the terminal. 
The SpeedTouch™ creates a new IP address pool, called a spoofing address 
pool. The SpeedTouch™will use this pool to provide a new IP address to the 
terminal that starts the secure connection. Simultaneous access to the VPN of 
multiple terminals in the LAN is not possible. The VPN server attributes a 
single virtual IP address.

Selecting nat has the effect that the VPN server attributes a virtual IP address to the 
SpeedTouch™ VPN client. This virtual IP address is stored in the SpeedTouch™. The 
SpeedTouch™ will automatically create a new NAT entry to map the virtual IP 
address to the IP addresses used on the local network. Simultaneous access to the 
VPN of multiple terminals is supported.

The 

 inherits the lease time for IP addresses 

from the 

In order to have a swift renewal 

of IP addresses, it is recommended to set a conveniently low lease 
time in the original dhcp address pool. A value of 60 seconds is 
suggested.