A Virtual Machine cannot be accessed via SSH. How do I resolve this?

Solution

• Perform a network connectivity check. After confirming that the network and port are communicating normally, try the following steps:

• If the Linux security policy is configured with an account expiration mode, login may be blocked. Run chage -l root to check the account expiration date. Run chage -E -1 root to set the account to never expire.

• If the SHA encryption algorithm in the CRT tool is incompatible, SSH login fails. Modify the CRT configuration or the SSH configuration so they share a common algorithm.

• Set the value of UseDNS to no.

• Verify whether the cloud-init default settings disable password-based login.