When using a Singapore cloud server, there may be some error factors that prevent you from connecting to the cloud server properly. First make sure that the local network connection is normal, and ensure that the computer can access the Internet normally. Use the ping command in the local command line window to test basic connectivity with the server. Such as:

ping your-server-ip

If the server cannot be pinged, the network path or firewall of the server may be faulty. A firewall may organize your link requests. Check the firewall first. If you have firewall permissions on the server, make sure to allow access to your IP address:

sudo iptables -L -n

Or if you are using a cloud server provider's firewall, make sure that the corresponding port is open to your IP. Some cloud server providers require additional security Settings. For example, check security group or firewall Settings. Log in to the cloud server provider's administration console. Check firewall or security group rules to make sure traffic is allowed: Make sure SSH ports are open to the public, and if you are using other ports to access applications, make sure those ports are also open to the public.

Ensure that the server is running, log in to the server provider's management control background to check the server status, if the status is abnormal try to restart the server.

If you use SSH to connect to the server, ensure that the SSH service is running properly on the server. Log in to the server by other means (for example, the vendor console can provide a remote terminal) and confirm that SSH is running.

sudo systemctl status ssh

Ensure that connection requests are not blocked by port and IP restrictions on the server. Check the SSH port. When the SSH port is modified, make sure to use the correct port when connecting:

ssh -p custom_port user@your-server-ip

Check the server logs. Logs can often provide useful error information to help diagnose problems. Check SSH logs:

sudo cat /var/log/auth.log

DNS configuration problems can also affect connections to cloud hosts in Singapore. Use the nslookup or dig command to check that the domain name is resolved correctly:

nslookup your-domain.com

or

dig your-domain.com

In addition to the common problems mentioned above, there may also be cases where server loads are too high, IP is blocked, and so on, causing cloud hosts in Singapore to be unable to respond to new requests. Check the CPU and memory usage. If multiple login failures occur, the IP address may be automatically blocked by the server firewall.

These are the common reasons for cloud host connection errors. I hope this will help you. If the fault persists, contact the technical support of the cloud server provider for more help.