This article was previously published under Q183812
This article has been archived. It is offered "as is" and will no longer be updated.
When a client application connected to a remote host over an ISDN bridgecloses the connection, one or more of the following may occur:
If keep-alives are enabled, the ISDN connection is not permitted to timeout.
NETSTAT shows CloseSocket() as established. You must restart the computer to recover from this condition.
Without keep-alives, eventually all of the user ports become permanently exhausted. This renders the computer inoperative on the network.
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in theMicrosoft Knowledge Base:
152734 How to Obtain the Latest Windows NT 4.0 Service Pack
Microsoft has confirmed that this is a problem in Windows NT 4.0 and Windows NT Server 4.0, Terminal Server Edition. This problem was first corrected in Windows NT 4.0 Service Pack 4.0 and Windows NT Server 4.0, Terminal Server Edition Service Pack 4.
Microsoft Windows NT Server 4.0, Terminal Server Edition, Microsoft Windows NT Server 4.0 Standard Edition, Microsoft Windows NT Workstation 4.0 Developer Edition, Microsoft Windows NT Server 4.0 Enterprise Edition