OPENSSH
OpenSSH is the standard open-source implementation of the SSH protocol used for secure remote login, file transfers, and remote command execution over untrusted networks. It provides the sshd server (to accept connections) and client tools such as ssh, scp, and sftp. For VPS and WordPress server operations, OpenSSH is the primary remote administration channel and must be configured carefully to reduce brute-force risk and prevent lockouts.
SSH Hardening Rank
SSH Security Comparison
Understanding SSH-keygen
ssh-keygen is an OpenSSH utility for generating and managing cryptographic keys used by SSH. It is foundational for secure server access because it enables key-based authentication, which is stronger and more operationally reliable than password-based SSH when deployed correctly.
Remote access SSH
Secure Shell (SSH) is the standard method for encrypted remote administration on Linux servers. In production environments, SSH is most commonly secured using key-based authentication, where a private key on the client proves identity to the server and the server authorizes access by matching that identity against ~/.ssh/authorized_keys.