Microsoft KB Archive/254989

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Internet Connection Dropped Immediately After Connecting to ISP


The information in this article applies to:

  • Microsoft Windows 2000 Professional
  • Microsoft Windows 2000 Server
  • Microsoft Windows 2000 Advanced Server


When you attempt to establish a connection to your Internet service provider (ISP), the connection may appear to be successfully established, but after a few seconds the connection may be dropped. When this occurs, you may not receive any error message.


This behavior can occur if the IP Security (IPSec) policy for TCP/IP is set to Server (Request Security) or Secure Server (Require Security).


To resolve this issue:

  1. Click Start, point to Settings, and then click Network and Dial-up Connections.
  2. Right-click the icon for your ISP, and then click Properties.
  3. Click the Networking tab, click Internet Protocol (TCP/IP), and then click Properties.
  4. Click Advanced, and then click the Options tab.
  5. Click IP Security, and then click Properties .
  6. In the Use this IP Security policy box, click Client (Respond Only) or Do not use IPSEC.
  7. Click OK or Close until all dialog boxes are closed.


By default, the IPSec setting is set to Do not use IPSEC.


This issue occurs because the client and server configuration are not compatible.

Additional query words: ppp kbfaqw2knet

Keywords : kbenv KBW2KHOME
Issue type : kbprb
Technology : kbwin2000AdvServ kbwin2000AdvServSearch kbwin2000Serv kbwin2000ServSearch kbwin2000Search kbwin2000ProSearch kbwin2000Pro kbWinAdvServSearch

Last Reviewed: October 24, 2000
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