Microsoft KB Archive/110315

= NetDDE and RAS Connections =

Article ID: 110315

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Advanced Server 3.1
 * Microsoft Windows NT Workstation 3.1
 * Microsoft Windows NT Advanced Server 3.1

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This article was previously published under Q110315



SUMMARY
When you attempt to use NetDDE over a Windows NT Remote Access Service (RAS) connection, the session can be started only by one of the systems. The system that can start the session is usually the one who dials into a RAS server. On the other system, a "Machine Name Not Found" error message appears.



MORE INFORMATION
NetDDE requires that a NCB.LISTEN be posted for the NetBIOS name of the clients. RAS for Windows NT defaults to not posting NCB.LISTEN for remote connections, but you can modify this in the registry. The registry entry is:   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\RemoteAccess \Parameters\NetbiosGateway\RemoteListen The default value is 1 for enabling Messenger and Server services only. Change the value to 2 to include NCB.LISTEN for all remote client NetBIOS names.

Warning: Enabling NCB.LISTEN require the RAS server to post all NetBIOS names from remote connections to the network. With a 64-port RAS server and an average of 5 or 6 names per Windows NT client, this can mean at least 320 NetBIOS names. This can exceed the 254 NetBIOS name limit per protocol/NIC on Windows NT.

Additional query words: adapter prodnt chat clipbook one way

Keywords: kbnetwork KB110315

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