When the Singapore server cannot be pinged, there may be a variety of reasons, including network connection problems, server configuration errors, firewall settings, etc. Here are some possible solutions:

Check local network connection:

First make sure your local network connection is working. Check your network devices such as routers, switches, and network cards to make sure they are not malfunctioning or misconfigured. You can try to restart the network device, or contact your Internet Service Provider (ISP) to check whether there is a network failure.

Check server configuration:

Confirm that the configuration of the Singapore server is correct. Check the network settings of the server, including whether the IP address, subnet mask, and gateway are correctly configured. Make sure your server's firewall settings allow ping requests to pass through.

Check firewall settings

A firewall may be blocking ping requests. Check the firewall settings on the server to make sure the ICMP protocol (the one used by ping) is allowed. If the firewall settings are incorrect, you can make corresponding adjustments according to the server operating system, such as using iptables or firewalld on Linux, and using firewall rules on Windows.

Check that the target server is functioning properly:

Confirm that the Singapore server is up and running. You can try to connect to the server through other methods (such as SSH, RDP, etc.) to check the running status of the server and whether the service is working normally. If the server is not started or the service is abnormal, the ping may fail.

Contact the server provider or administrator:

If you are not an administrator of the server or do not have permission to make configuration changes, you can contact the server provider or administrator for assistance. They may check the server's configuration and network settings and provide a solution.

It should be noted that some servers may be configured not to respond to ping requests, so the availability of the server cannot be judged by the ping test. In this case, try other means of checking the status of the server, such as connecting to a service port on the server. If the problem persists, it is recommended to seek the help of a professional network administrator to diagnose and resolve the problem.