RFC 1412 (rfc1412) - Page 1 of 4
Telnet Authentication: SPX
Alternative Format: Original Text Document
Network Working Group K. Alagappan
Request for Comments: 1412 Digital Equipment Corporation
January 1993
Telnet Authentication: SPX
Status of this Memo
This memo defines an Experimental Protocol for the Internet
community. Discussion and suggestions for improvement are requested.
Please refer to the current edition of the "IAB Official Protocol
Standards" for the standardization state and status of this protocol.
Distribution of this memo is unlimited.
1. Command Names and Codes
Authentication Types
SPX 3
Suboption Commands
AUTH 0
REJECT 1
ACCEPT 2
2. Command Meanings
IAC SB AUTHENTICATION IS AUTH
IAC SE
This is used to pass the SPX authentication token to the remote
side of the connection. (A document which describes the
authentication token syntax is forthcoming.) The first octet of
the value is SPX. The second octet is
a modifier to the SPX authentication type.
IAC SB AUTHENTICATION REPLY ACCEPT
IAC SE
This command indicates that the authentication was successful.
After an SPX authentication exchange, both sides have securely
established a random 8-byte key to be used as the default key for
the ENCRYPTION option. If the AUTH_HOW_MUTUAL bit is set in the
second octet of the authentication-type-pair, the sender includes
the mutual response bytes. The receiver of the ACCEPT command
compares the "mutual response" with its expected mutual response.
Telnet Working Group