Microsoft KB Archive/315978

= Network Problems with a Router in Windows XP =

Article ID: 315978

Article Last Modified on 5/7/2007

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APPLIES TO


 * Microsoft Windows XP Home Edition
 * Microsoft Windows XP Professional

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This article was previously published under Q315978



SYMPTOMS
You may experience one or more of the following symptoms in your peer-to-peer network that includes Windows XP and a router:
 * You can browse the Internet, but you cannot browse your local area connection.
 * You are able to ping your loopback address (127.0.0.1), but you cannot ping another computer on the same network.

Example
You have one Windows XP-based computer, and one computer that is running one of the following operating systems:
 * Microsoft Windows 2000
 * Microsoft Windows Millennium Edition (Me)
 * Microsoft Windows 98

Your two computers cannot see each other in Network Neighborhood or in My Network Places, but they can still obtain IP addresses that are assigned by a DHCP server.



CAUSE
The problem may occur if your hardware router has a built-in firewall that has closed ports.



RESOLUTION
To resolve this issue, open the appropriate ports. For information about how to do so, view your router documentation or contact your router manufacturer.

For information about how to contact your router manufacturer, click the appropriate article number in the following list to view the article in the Microsoft Knowledge Base:

65416 Hardware and Software Third-Party Vendor Contact List, A-K

60781 Hardware and Software Third-Party Vendor Contact List, L-P

60782 Hardware and Software Third-Party Vendor Contact List, Q-Z



STATUS
This behavior is by design.



MORE INFORMATION
For additional information about how to troubleshoot network issues, click the article numbers below to view the articles in the Microsoft Knowledge Base:

314067 How to Troubleshoot TCP/IP Connectivity with Windows XP

314095 Troubleshooting Problems Communicating on the Internet

310089 Troubleshooting Cable Modems

308007 How to troubleshoot home networking in Windows XP

308006 Troubleshooting Internet Connection Sharing in Windows XP

313242 How to Troubleshoot Wireless Network Connections in Windows XP

Keywords: kbenv kbnetwork kbprb KB315978

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