TELNET OPTIONS The Telnet Protocol has a number of options that may be negotiated. These options are listed here. "Internet Official Protocol Standards" (STD 1) provides more detailed information. Options Name References ------- ----------------------- ---------- 0 Binary Transmission [RFC856] 1 Echo [RFC857] 2 Reconnection [NIC50005] 3 Suppress Go Ahead [RFC858] 4 Approx Message Size Negotiation [ETHERNET] 5 Status [RFC859] 6 Timing Mark [RFC860] 7 Remote Controlled Trans and Echo [RFC726] 8 Output Line Width [NIC50005] 9 Output Page Size [NIC50005] 10 Output Carriage-Return Disposition [RFC652] 11 Output Horizontal Tab Stops [RFC653] 12 Output Horizontal Tab Disposition [RFC654] 13 Output Formfeed Disposition [RFC655] 14 Output Vertical Tabstops [RFC656] 15 Output Vertical Tab Disposition [RFC657] 16 Output Linefeed Disposition [RFC657] 17 Extended ASCII [RFC698] 18 Logout [RFC727] 19 Byte Macro [RFC735] 20 Data Entry Terminal [RFC1043,RFC732] 21 SUPDUP [RFC736,RFC734] 22 SUPDUP Output [RFC749] 23 Send Location [RFC779] 24 Terminal Type [RFC1091] 25 End of Record [RFC885] 26 TACACS User Identification [RFC927] 27 Output Marking [RFC933] 28 Terminal Location Number [RFC946] 29 Telnet 3270 Regime [RFC1041] 30 X.3 PAD [RFC1053] 31 Negotiate About Window Size [RFC1073,DW183] 32 Terminal Speed [RFC1079] 33 Remote Flow Control [RFC1372] 34 Linemode [RFC1184] 35 X Display Location [RFC1096] 36 Environment Option [RFC1408] 37 Authentication Option [RFC1416] 38 Encryption Option [Borman] 39 New Environment Option [RFC1572] 40 TN3270E [RFC1647] 41 XAUTH [Earhart] 255 Extended-Options-List [RFC861] Telnet Authentication Types In [RFC1416], a list of authentication types is introduced. Additions to the list are registerd by the IANA and documented here. Type Description Reference 0 NULL [RFC1416] 1 KERBEROS_V4 [RFC1416] 2 KERBEROS_V5 [RFC1416] 3 SPX [RFC1416] 4-5 Unassigned [IANA] 6 RSA [RFC1416] 7-9 Unassigned [IANA] 10 LOKI [RFC1416] 11 SSA [Schoch] In [RFC 1411], on the KERBEROS_V4 Telnet Authentication type there are a set of Suboption Commands. Additions to the list are registerd by the IANA and documented here. Suboption Command Reference 0 AUTH [RFC1411] 1 REJECT [RFC1411] 2 ACCEPT [RFC1411] 3 CHALLENGE [RFC1411] 4 RESPONSE [RFC1411] 5 FORWARD [Brashear] 6 FORWARD-ACCEPT [Brashear] 7 FORWARD-REJECT [Brashear] REFERENCES [ETHERNET] "The Ethernet, A Local Area Network: Data Link Layer and Physical Layer Specification", AA-K759B-TK, Digital Equipment Corporation, Maynard, MA. Also as: "The Ethernet - A Local Area Network", Version 1.0, Digital Equipment Corporation, Intel Corporation, Xerox Corporation, September 1980. And: "The Ethernet, A Local Area Network: Data Link Layer and Physical Layer Specifications", Digital, Intel and Xerox, November 1982. And: XEROX, "The Ethernet, A Local Area Network: Data Link Layer and Physical Layer Specification", X3T51/80-50, Xerox Corporation, Stamford, CT., October 1980. [NIC50005] DDN Protocol Handbook, "Telnet Reconnection Option", "Telnet Output Line Width Option", "Telnet Output Page Size Option", NIC 50005, December 1985. [RFC652] Crocker, D., "Telnet Output Carriage-Return Disposition Option", RFC 652, UCLA-NMC, October 1974. [RFC653] Crocker, D., "Telnet Output Horizontal Tabstops Option", RFC 653, UCLA-NMC, October 1974. [RFC654] Crocker, D., "Telnet Output Horizontal Tab Disposition Option", RFC 654, UCLA-NMC, October 1974. [RFC655] Crocker, D., "Telnet Output Formfeed Disposition Option", RFC 655, UCLA-NMC, October 1974. [RFC656] Crocker, D., "Telnet Output Vertical Tabstops Option", RFC 656, UCLA-NMC, October 1974. [RFC657] Crocker, D., "Telnet Output Vertical Tab Disposition Option", RFC 657, UCLA-NMC, October 1974. [RFC658] Crocker, D., "Telnet Output Linefeed Disposition", RFC 658, UCLA-NMC, October 1974. [RFC698] Tovar, "Telnet Extended ASCII Option", RFC 698, Stanford University-AI, July 1975. [RFC726] Postel, J. and D. Crocker, "Remote Controlled Transmission and Echoing Telnet Option", RFC 726, SRI-ARC, UC Irvine, March 1977. [RFC727] Crispin, M., "Telnet Logout Option", RFC 727, Stanford University-AI, April 1977. [RFC734] Crispin, M., "SUPDUP Protocol", RFC 734, Stanford, October 1977. [RFC735] Crocker, D. and R. Gumpertz, "Revised Telnet Byte Marco Option", RFC 735, Rand, CMU, November 1977. [RFC736] Crispin, M., "Telnet SUPDUP Option", Stanford University-AI, RFC 736, Stanford, October 1977. [RFC749] Greenberg, B., "Telnet SUPDUP-OUTPUT Option", RFC 749, MIT-Multics, September 1978. [RFC779] Killian, E., "Telnet Send-Location Option", RFC 779, LLL, April 1981. [RFC856] Postel, J. and J. Reynolds, "Telnet Binary Transmission", STD 27, RFC 856, USC/Information Sciences Institute, May 1983. [RFC857] Postel, J. and J. Reynolds, "Telnet Echo Option", STD 28, RFC 857, USC/Information Sciences Institute, May 1983. [RFC858] Postel, J. and J. Reynolds, "Telnet Suppress Go Ahead Option", STD 29, RFC 858, USC/Information Sciences Institute, May 1983. [RFC859] Postel, J. and J. Reynolds, "Telnet Status Option", STD 30, RFC 859, USC/Information Sciences Institute, May 1983. [RFC860] Postel, J. and J. Reynolds, "Telnet Timing Mark Option", STD 31, RFC 860, USC/Information Sciences Institute, May 1983. [RFC861] Postel, J. and J. Reynolds, "Telnet Extended Options - List Option", STD 32, RFC 861, USC/Information Sciences Institute, May 1983. [RFC885] Postel, J., "Telnet End of Record Option", RFC 885, USC/Information Sciences Institute, December 1983. [RFC927] Anderson, B., "TACACS User Identification Telnet Option", RFC 927, BBN, December 1984. [RFC933] Silverman, S., "Output Marking Telnet Option", RFC 933, MITRE, January 1985. [RFC946] Nedved, R., "Telnet Terminal Location Number Option", RFC 946, Carnegie-Mellon University, May 1985. [RDC1041] Rekhter, J., "Telnet 3270 Regime Option", RFC 1041, IBM, January 1988. [RFC1043] Yasuda, A., and T. Thompson, "TELNET Data Entry Terminal Option DODIIS Implementation", RFC 1043, DIA, February 1988. [RFC1053] Levy, S., and T. Jacobson, "Telnet X.3 PAD Option", RFC 1053, Minnesota Supercomputer Center, April 1988. [RFC1073] Waitzman, D., "Telnet Window Size Option", RFC 1073, BBN STC, October, 1988. [RFC1079] Hedrick, C., "Telnet Terminal Speed Option", RFC 1079, Rutgers University, December 1988. [RFC1091] VanBokkelen, J., "Telnet Terminal Type Option", RFC 1091, FTP Software, Inc., February 1989. [RFC1096] Marcy, G., "Telnet X Display Location Option", RFC 1096, Carnegie Mellon University, March 1989. [RFC1184] Borman, D., Editor, "Telnet Linemode Option", RFC 1184, Cray Research, Inc., October 1990. [RFC1372] Hedrick, C., and D. Borman, "Telnet Remote Flow Control Option", RFC 1372, Rutgers University, Cray Research, Inc., October 1992. [RFC1408] Borman, D., Editor, "Telnet Environment Option", RFC 1408, Cray Research, Inc., January 1993. [RFC1411] Borman, D., Editor, "Telnet Authentication: Kerberos Version 4", RFC 1411, Cray Research, Inc., January 1993. [RFC1416] Borman, D., Editor, "Telnet Authentication Option", RFC 1416, Cray Research, Inc., February 1993. [RFC1572] Alexander, S., Editor, "Telnet Environment Option", RFC1572, Lachman Technology, Inc., January 1994. [RFC1647] Kelly, B., "TN3270 Enhancements", RFC1647, Auburn University, July 1994. PEOPLE [Brashear] Derrick Brashear, <shadow@dementia.org>, January 1995. [Borman] Dave Borman, <dab@CRAY.COM>, January 1995. [Earhart] Rob Earhart, <earhart+@CMU.EDU>, April 1995. [IANA] Internet Assigned Numbers Authority, <iana@isi.edu>, January 1995. [Schoch] Steven Schoch, <schoch@sheba.arc.nasa.gov>, January 1995. []