If the problem is indeed caused by security group configurations, click Open all ports in Port Verification and try to log in again. If you still cannot log in after opening the ports, refer to the following for troubleshooting.
Troubleshooting
Checking network connectivity
You can use the Ping command to test network connectivity from your PC. You should run the test from computers in different network environments (such as different IP ranges or ISPs) to check whether it is a local network problem or a server problem.
1. Open the command line tool on your local computer.
Windows: click Start > Run and enter cmd. A Command Prompt window appears.
MacOS: open a Terminal window.
2. Run the following command to test network connection.
If the result similar to the following is returned, your network connection to the CVM instance is normal.
If Request Timeout appears, your network connection to the CVM instance is not working properly. In this case, refer to Instance IP Address Ping Failure for troubleshooting instructions.
2. Run the following command and press Enter to check whether the remote port is open and accessible.
telnet [CVM instance’s public IP address][Port number]
For example, run the telnet 119.XX.XXX.67 22 command to check whether the port 22 is open.
If information similar to what is shown below is returned, the port 22 is accessible.
If information similar to what is shown below is returned, the port 22 is unaccessible. Check the corresponding network configuration. For example, check whether the port 22 is open in the firewall or security group of the instance.
