Unable to Connect ESXi Using SSH

Today, I faced an issue that despite SSH service was running properly and Lockdown mode was not enabled but I was not able to connect ESXi host using ssh to perform some tasks. I restarted the SSH service again but issue didn’t  fixed. I was getting error  “Network error: Connection timed out”

So upon checking, I found that in Firewall Properties (Remote Access) and under Required Services, SSH Server was Unchecked. I checked it and restarted SSH service once again.

SSH server is checked by default but if you will uncheck, SSH connectivity will not work or another reason may be Lockdown mode is enabled.