XCLN: Shiva Error: Unable to Negotiate LCP Connection (175099)

SYMPTOMS

When using the ShivaRemote client software to establish a connection through a Remote Access Service (RAS) server to an Exchange Server computer, you may receive the following error message:

Unable to negotiate LCP connection. Please check that
remote device is installed and configured and that
dial-in is enabled

CAUSE

The RAS server is a computer running Windows NT 4.0. If your RAS server is configured to "Allow any authentication including clear text," a RAS client is able to connect with Password Authentication Protocol (PAP), Shiva Password Authentication Protocol (SPAP), Challenge Handshake Authentication Protocol (CHAP), or Microsoft CHAP (MS- CHAP) depending on what the client supports. Normally, a client will attempt to connect with CHAP or MS-CHAP, if that is valid for the RAS server to which it is connecting. In the case of Shiva remote client connections, Shiva does not support MS-CHAP. Encountering this protocol causes the Shiva client to fail.

For additional information about Windows NT 4.0 RAS server authentication configuration, please see the following article in the Microsoft Knowledge Base:

172216 How to Force Routing and Remote Access to Use PAP

WORKAROUND

To work around the problem:

Set the Windows NT 4.0 RAS server to use NetBEUI as the only protocol. This will allow the Exchange connection to work successfully. However, the NetBEUI protocol has limitations that others do not.

-or-
Upgrade the client to Windows 95 and use dial-up networking to configure a remote connection.

-or-
Downgrade the RAS server to Windows NT version 3.51 with the latest service pack. Shiva can successfully negotiate connections through Windows NT 3.51 RAS servers using any protocol.