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Event ID 640 — TS Gateway Server Availability

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Applies To: Windows Server 2008

The Terminal Services Gateway (TS Gateway) server must be available on the network and the appropriate services must be running on the TS Gateway server. The Terminal Services connection authorization policy (TS CAP) and Terminal Services resource authorization policy (TS RAP) stores must also be available, so that these policies can be evaluated to determine whether remote clients meet policy requirements. TS CAPs specify who can connect to a TS Gateway server. TS RAPs specify the internal network resources (computers) that clients can connect to through a TS Gateway server. If TS CAPs and TS RAPs are not available, the TS Gateway server will not be available for client connections.

Event Details

Product: Windows Operating System
ID: 640
Source: Microsoft-Windows-TerminalServices-Gateway
Version: 6.0
Symbolic Name: AAG_EVENT_NAP_TO_IAS_FAILED
Message: TS Gateway Network access Policy engine failed to contact IAS and the error was "%2"

Resolve

Ensure that the Network Policy Server service is started

To resolve this issue, ensure that the Network Policy Server service is started.

To perform this procedure, you must have membership in the local Administrators group, or you must have been delegated the appropriate authority.

If you have configured local Terminal Services connection authorization policies (TS CAPs), perform the following procedure on the TS Gateway server. If you have configured central TS CAPs (TS CAPs that are stored on another computer running the Network Policy Server service), perform the following procedure on the NPS server where the central TS CAPs are stored.

To ensure that the Network Policy Server service is started:

  1. On the TS Gateway server or the NPS server where the central TS CAPs are stored, click Start, point to Administrative Tools, and then click Services.
  2. In the Services snap-in, find Network Policy Server, and then confirm that Started appears in the Status column.
  3. If the status is not Started, right-click Network Policy Server, and then click Start.
  4. If the attempt to start only the service fails, restart the computer. This forces all related and dependent services to restart.
  5. If you want the service to always start automatically after the server is restarted, right-click Network Policy Server, click Properties, and in Startup type, select Automatic, and then click OK.

Verify

To verify that the TS Gateway server is available for client connections, examine Event Viewer logs and search for the following event messages. These event messages indicate that the Terminal Services Gateway service is running, and that clients are successfully connecting to internal network resources through the TS Gateway server.

To perform this procedure, you do not need to have membership in the local Administrators group. Therefore, as a security best practice, consider performing this task as a user without administrative credentials.

To verify that the TS Gateway server is available for client connections:

  1. On the TS Gateway server, click Start, point to Administrative Tools, and then click Event Viewer.
  2. In the Event Viewer console tree, navigate to Application and Services Logs\Microsoft\Windows\TerminalServices-Gateway, and then search for the following events:
    • Event ID 101, Source TerminalServices-Gateway: This event indicates that the Terminal Services Gateway service is running.
    • Event ID 200, Source TerminalServices-Gateway: This event indicates that the client connected to the TS Gateway server.
    • Event ID 302, Source TerminalServices-Gateway: This event indicates that the client connected to an internal network resource through the TS Gateway server.

TS Gateway Server Availability

Terminal Services