RFC 927 (rfc927) - Page 1 of 4
TACACS user identification Telnet option
Alternative Format: Original Text Document
Network Working Group Brian A. Anderson
Request for Comments: 927 BBN
December 1984
TACACS User Identification Telnet Option
Status of this Memo
This RFC suggests a proposed protocol for the ARPA-Internet
community, and requests discussion and suggestions for improvements.
Distribution of this memo is unlimited.
Introduction
The following is the description of a TELNET option designed to
facilitate double login avoidance. It is intended primarily for TAC
connections to target hosts on behalf of TAC users, but it can be
used between any two consenting hosts. For example, all hosts at one
site (e.g., BBN) can use this option to avoid double login when
TELNETing to one another.
1. Command name and code
TUID 26
2. Command Meanings
IAC WILL TUID
The sender (the TELNET user) proposes to authenticate the user and
send the identifing UUID; or, the sender (the TELNET user) agrees
to authenticate the user on whose behalf the connection is
initiated.
IAC WON'T TUID
The sender (the TELNET user) refuses to authenticate the user on
whose behalf the connection is initiated.
IAC DO TUID
The sender (the TELNET server) proposes that the recipient (the
TELNET user) authenticate the user and send the identifing UUID;
or, the sender (the TELNET server) agrees to accept the
recipient's (the TELNET user's) authentication of the user
identified by his UUID.
Anderson