For more information about Telnet, SSH, and libssh, please refer to the following:
- The SSH library https://www.libssh.org
- RFC 15: Network Subsystem for Time Sharing Hosts (Telnet) (https://tools.ietf.org/html/rfc15)
- RFC 855: Telnet Option Specifications (https://tools.ietf.org/html/rfc855)
- RFC 4250: The Secure Shell (SSH) Protocol Assigned Numbers (https://tools.ietf.org/html/rfc4250)
- RFC 4251: The Secure Shell (SSH) Protocol Architecture (https://tools.ietf.org/html/rfc4251)
- RFC 4252: The Secure Shell (SSH) Authentication Protocol (https://tools.ietf.org/html/rfc4252)
- RFC 4253: The Secure Shell (SSH) Transport Layer Protocol (https://tools.ietf.org/html/rfc4253)
- RFC 4254: The Secure Shell (SSH) Connection Protocol (https://tools.ietf.org/html/rfc4254)
- RFC 4255: Using DNS to Securely Publish...