http://www.rfc-editor.org/rfc/rfc2942.txt
RFC 2942: Telnet Authentication: Kerberos Version 5, T. Ts'o2000-09-01T23:00:00-00:00This document describes how Kerberos Version 5 is used with the telnet protocol. It describes an telnet authentication suboption to be used with the telnet authentication option. [STANDARDS-TRACK]