Thanks to Proshanta’s hard work, the network policy of HPCL changes slightly: all the servers are authenticated via key pair only.
Generate the public/private key pair as
ssh-keygen -t rsa
Copy the public key to the reomote host:
scp ~/.ssh/id_rsa.pub user@server:~/ ssh user@server [user@server] ssh-keygen -i -f id_rsa.pub # at remote server cat ~/id_rsa.pub >> ~/.ssh/authorized_keys2
OpenSSH key pair format is not compatible with SSH.com’s client/server. We need to convert it before append it to the configurations if necessary.