Completely switching off the Windows Firewall service (It is not recommended in most cases as it opens the doors for network security threats)- We are not talking about this step here.Two Methods to Enable Ping or ICMP Requests in Windows XP The source device sends ICMP packets to the destination and waits for the response, and when the destination computer doesn’t acknowledge and reply to these packets, we will see ‘Request time out’ reply. The reason is that the ICMP packet used in ping command is blocked by default. We will be getting ‘Request Time Out’ reply from the destination, even though it is connected and accessible on the local network.