When you use the TCP/IP Ping.exe command line utility to verify network connectivity with another computer on the local network or on the Internet, you may receive a command-line error message that is similar to the following:

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This behavior occurs because the following conditions are true:

•	The Internet Connection Sharing (ICS) feature is enabled.
•	Firewall software from Zone Labs, is installed on the computer. ZoneAlarm and ZoneAlarmPro are examples of Zone Labs firewall software.
•	The ZoneLabs firewall software is not correctly configured for ICS.

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To resolve this behavior, use one of the following methods that is appropriate to your situation:

•	Configure ZoneAlarm for ICS support. Please see the program documentation or see the Zone Labs Web site for more information about how to configure ZoneAlarm for ICS.
•	Remove the Zone Labs firewall software from the computer. Please see the program documentation or contact Zone Labs at the ZoneLabs Web site for more information about how to do this.

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For support for ZoneLabs products, visit the following ZoneLabs Web site: For more information about ZoneAlarm or to contact ZoneLabs, visit the following Zone Labs Web site: The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.
Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.

For additional information about Internet Connection Sharing in Windows XP, click the article numbers below to view the articles in the Microsoft Knowledge Base: For more information about home networking and Internet Connection Sharing in Windows XP, see the following Microsoft Web site to view the Microsoft Support Webcast: For additional information about how to troubleshoot TCP/IP Connectivity in Windows XP, click the article number below to view the article in the Microsoft Knowledge Base:

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