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Configuring a PPTP connection

If your ISP has allocated you a dynamic address using PPTP you
will have selected PPTP (used by some European providers) as
your IP Allocation Mode.
Figure 37 PPTP Setup Screen
To setup the Gateway for use with a PPTP connection the
following fields will need to be completed.
■IP Address — The internet address allocated by your ISP for
this connection is automatically configured and is not
editable.
■PPTP Server Address - This is typically the address of your
modem.
■PPTP User Name - The user name you use to access your ISP.
■PPTP Password - The password you use to access your ISP.
■Primary DNS Address - The address of your ISP’s Domain
Name Service server is automatically configured and is not
editable.
■Secondary DNS Address - The address of your ISP’s secondary
Domain Name Service server. The second server is optionally
provided by an ISP in case of failure of the primary server.
■Maximum Idle Time - The amount of time without activity
before the Gateway terminates the Internet connection.
■Initial IP Address and Initial Subnet Mask - IP settings must be
used when establishing a PPTP connection. Alternatively, if the
PPTP server is located in your DSL modem, click Suggest to
select an IP address on the same subnet as the PPTP server.
Setting up NAT
The Gateway is able to perform Network Address Translation
(NAT) in one of two modes as shown in Figure38:
■One-to-many NAT — The Gateway shows only one address to
the Internet.
■One-to-one NAT — Every address on the Internet pool is
linked to an address in the LAN pool. The Gateway will
respond to all the addresses in the Internet pool.
dua08569-5aaa02.boo k Pag e 43 Thursday, Novem b er 7, 2002 3:09 PM