VPN Client in Windows XP Disconnects After One Minute (331816)


The information in this article applies to:

  • Microsoft Windows XP Home Edition SP1
  • Microsoft Windows XP Professional SP1
This article was previously published under Q331816

SYMPTOMS

After you install Service Pack 1 (SP1) for Windows XP, your computer may drop virtual private network (VPN) connections that are using Point-to-Point Tunneling Protocol (PPTP) after about 55 seconds.

CAUSE

This behavior may occur if Internet Connection Sharing is turned on for one or more of your network connections.

RESOLUTION

Service pack information

To resolve this problem, obtain the latest service pack for Microsoft Windows XP. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

322389 How to obtain the latest Windows XP service pack

Hotfix information

A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem. This fix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Windows XP service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The typical support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

The English version of this fix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
   Date          Time    Version         Size      File name
   ------------------------------------------------------------
   14-Nov-2002   14:16   5.1.2600.1142   154,112   Netman.dll
   14-Nov-2002   14:16   5.1.2600.1142   435,200   Ipnathlp.dll

WORKAROUND

To work around this problem, turn off Internet Connection Sharing to prevent VPN connections from disconnecting. To do this:
  1. Open Network Connections.
  2. Right-click the dial-up connection, local area network connection, PPPoE connection, or VPN connection that you no longer want to share, and then click Properties.
  3. Click the Advanced tab.
  4. Clear the Allow other network users to connect through this computer's Internet connection check box, and then click OK.

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Microsoft Windows XP Service Pack 2.
Modification Type:MinorLast Reviewed:10/11/2005
Keywords:kbHotfixServer kbQFE kbWinXPsp2fix kbbug kbfix kbQFE kbWinXPpreSP2fix KB331816
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