To enable Internet Control Message Protocols
Open Network Connections
Click the connection for which Internet Connection Firewall is enabled, and then, under Network Tasks, click Change settings of this connection.
On the Advanced tab, click Settings.
On the ICMP tab, select the check box(es) beside the type(s) of request for information to which you would like your computer to respond.
To open Network Connections, click Start, click Control Panel, click Network and Internet Connections, and then click Network Connections.
You must be logged on as an administrator or a member of the Administrators group in order to complete this procedure. If your computer is connected to a network, network policy settings may also prevent you from completing this procedure.
All Internet Control Message Protocols (ICMP) options are disabled by default. If you enable ICMP options, your network can become visible to the Internet and vulnerable to intrusions.
Internet Connection Sharing, Internet Connection Firewall, Discovery and Control, and Network Bridge are not available on Windows XP 64-Bit Edition.
Home and small office networking components overview
Internet Connection Firewall overview
Disable Internet Control Message Protocols