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12-6 Administration Guide
itself a compression protocol.
Note: The Netopia 4753 supports 128-bit (“strong”) encryption. Unlike MS-CHAP version 1, which supports
one-way authentication, MS-CHAP version 2 supports mutual authentication between connected routers and is
incompatible with MS-CHAP version 1 (MS-CHAP-V1). When you choose MS-CHAP as the authentication method
for the PPTP tunnel, the Netopia router will start negotiating MS-CHAP-V2. If the router you are connecting to
does not support MS-CHAP-V2, it will fall back to MS-CHAP-V1, or, if the router you are connecting to does not
support MPPE at all, the PPP session will be dropped.
■ You can specify a Send Host Name which is used with Send Secret for authenticating with a remote PNS
when the profile is used for initiating a tunnel connection.
■ You must specify a Send Secret (the CHAP and MS-CHAP term for password), used for authenticating the
tunnel when initiating a tunnel connection.
■ You can specify a Receive Host Name which is used with the Receive Secret for authenticating a remote
PPTP client.
■ You must specify a Receive Secret, used for authenticating the remote PPTP client.
■ You can specify that this router will Initiate Connections (acting as a PAC) or only answer them (acting as a
PNS).
■ Tunnels are normally initiated On Demand; however, you can disable this feature. When disabled, the
tunnel must be manually established via the call management screens or may be scheduled using the
scheduled connections feature. See “Scheduled Connections” in the User’s Reference Guide.
■ Some networks that use Microsoft Windows NT PPTP Network Servers require additional authentication
information, called Windows NT Domain Name, when answering PPTP tunnel connection requests. Not all
Windows NT installations require this information, since not all such installations use this authentication
feature. The Windows NT Domain Name is not the same as the Internet domain name, but is the name of
a group of servers that share common security policy and user account databases. Your PPTP tunnel
partner’s administrator will supply this Windows NT Domain Name if it is required. If you configure your
Netopia 4753 to initiate PPTP tunnel connections by toggling Initiate Connections to Yes, the Optional
Windows NT Domain Name field appears. Enter the domain name your network administrator has supplied.
■ 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.
■ Return to the Connection Profile screen by pressing Escape.
■ Select IP Profile Parameters and press Return.