DOCUMENT:Q110315  21-JAN-1994  [W_NT]
TITLE   :NetDDE and RAS Connections
PRODUCT :Windows NT
PROD/VER:3.10
OPER/SYS:WINDOWS
KEYWORDS:

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The information in this article applies to:

 - Microsoft Windows NT operating system version 3.1
 - Microsoft Windows NT Advanced Server version 3.1
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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 reference words: 3.10 chat clipbook one way
KBCategory:
KBSubCategory: netsrv


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