Secure Shell (SSH) definition in Cybersecurity

Secure Shell (SSH) is a cryptographic network protocol for operating network services securely over an unsecured network. Typical applications include remote command-line login and remote command execution, but any network service can be secured with SSH.

Open source or Free solutions

1. OpenSSH
2. PuTTY (for Windows clients)

Paying solutions

1. Tectia SSH
2. Bitvise SSH Server