When I tried to connect a remote server (say 'server A') through ssh, it continuously failed with no response and finally showed connection timeout.
The network connection situation is following.
I have several different servers with same first two digits in the ip address e.g. A.B.x.x (Here, A, B are same) in my local computer and servers.
The weird thing is that I can connect other servers including my local computer through ssh from 'server A', however, the opposite way is definitely impossible right now: SSH connection from any server to 'server A'.
I also checked port 22 is opened on 'server A', with
What can I try to solve it or please comment anything we can see to realize what's the exact situation is.