If you are getting the error bad file descriptor while establishing remote connection to another server, it seems you have configuration error for you SSH server’s port.
Reason:
Outgoing connections are blocked by firewall, or port is blocked for outgoing connections in firewall.
Quick Fix:
Add the PORT Number in outgoing enabled port list in firewall, for CSF you need to add it in TCP_IN and TCP_OUT ports list.
Feedback are appreciated : )
