Microsoft KB Archive/138924

= FTP, WWW, and Telnet Fail over RAS Even Though Ping Works =

Article ID: 138924

Article Last Modified on 12/5/2003

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APPLIES TO


 * Microsoft Windows NT Workstation 3.5
 * Microsoft Windows NT Workstation 3.51
 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Windows NT Server 3.5
 * Microsoft Windows NT Server 3.51
 * Microsoft Windows NT Server 4.0 Standard Edition
 * Microsoft Windows 95

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This article was previously published under Q138924



SYMPTOMS
On your computer running Windows NT or Windows 95, when you use Remote Access (RAS) or Dial-up networking with the PPP and TCP/IP protocols enabled, you cannot connect to computers on the Internet that are running the World Wide Web (WWW), FTP, Telnet, or other software that relies on TCP/IP packets to exchange information.

PING.EXE and TRACERT.EXE, however, still function correctly.



CAUSE
You have VJ Header compression enabled and VJ Header compression is not compatible with the PPP server or router you are connecting to for Internet access.

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Using Windows NT 4.0 you have Software Header Compression enabled, and it is not compatible with the PPP server or router your are connecting to for Internet access.



RESOLUTION
Perform the following steps to disable VJ header compression:

Windows NT 3.5X

 * 1) Start RAS.
 * 2) From the list of servers to call, select the entry for the Internet access server where the problem occurs.
 * 3) Click Edit.
 * 4) If the Advanced button is displayed, click Advanced.
 * 5) Click Network, and then click TCP/IP Settings.
 * 6) Click to clear the Use VJ Header Compression check box.

Windows NT 4.0

 * 1) Double-click My Computer.
 * 2) Double-click Dial-Up Networking.
 * 3) Click More, and then point to Edit Entry and Modem Properties.
 * 4) Click the Server tab, and then click TCP/IP Settings.
 * 5) Click to clear the check box next to IP Header Compression.

Windows 95

 * 1) Right-click the Dial-Up Networking connection with the problem and then click Properties.
 * 2) Click Server Type, and then click TCP/IP Settings.
 * 3) Click to clear the Use IP Header Compression check box.



MORE INFORMATION
VJ header compression (also referred to as IP header compression) is only used during the exchange of TCP/IP packets. Ping.exe and Tracert.exe use ICMP packets to test connectivity and, therefore, are not affected by VJ header compression.

Additional query words: dialup ip

Keywords: kbnetwork KB138924

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