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1.1 root 1: .\" Copyright (c) 1983, 1990 The Regents of the University of California.
2: .\" All rights reserved.
3: .\"
4: .\" Redistribution and use in source and binary forms are permitted provided
5: .\" that: (1) source distributions retain this entire copyright notice and
6: .\" comment, and (2) distributions including binaries display the following
7: .\" acknowledgement: ``This product includes software developed by the
8: .\" University of California, Berkeley and its contributors'' in the
9: .\" documentation or other materials provided with the distribution and in
10: .\" all advertising materials mentioning features or use of this software.
11: .\" Neither the name of the University nor the names of its contributors may
12: .\" be used to endorse or promote products derived from this software without
13: .\" specific prior written permission.
14: .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
15: .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
16: .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
17: .\"
18: .\" @(#)rlogin.1 6.17.1.1 (Berkeley) 10/21/90
19: .\"
20: .Dd October 21, 1990
21: .Dt RLOGIN 1
22: .Os BSD 4.2
23: .Sh NAME
24: .Nm rlogin
25: .Nd remote login
26: .Sh SYNOPSIS
27: .Ar rlogin
28: .Op Fl 8EKLd
29: .Op Fl e Ar char
30: .Op Fl k Ar realm
31: .Op Fl l Ar username
32: .Ar host
33: .Sh DESCRIPTION
34: .Nm Rlogin
35: starts a terminal session on a remote host
36: .Ar host .
37: .Pp
38: .Nm Rlogin
39: first attempts to use the Kerberos authorization mechanism, described below.
40: If the remote host does not supporting Kerberos the standard Berkeley
41: .Pa rhosts
42: authorization mechanism is used.
43: The options are as follows:
44: .Tw Fl
45: .Tp Fl 8
46: The
47: .Fl 8
48: option allows an eight-bit input data path at all times; otherwise
49: parity bits are stripped except when the remote side's stop and start
50: characters are other than ^S/^Q.
51: .Tp Fl E
52: The
53: .Fl E
54: option stops any character from being recognized as an escape character.
55: When used with the
56: .Fl 8
57: option, this provides a completely transparent connection.
58: .Tp Fl K
59: The
60: .Fl K
61: option turns off all Kerberos authentication.
62: .Tp Fl L
63: The
64: .Fl L
65: option allows the rlogin session to be run in ``litout'' (see
66: .Xr tty 4 )
67: mode.
68: .Tp Fl d
69: The
70: .Fl d
71: option turns on socket debugging (see
72: .Xr setsockopt 2 )
73: on the TCP sockets used for communication with the remote host.
74: .Tp Fl e
75: The
76: .Fl e
77: option allows user specification of the escape character, which is
78: ``~'' by default.
79: This specification may be as a literal character, or as an octal
80: value in the form \ennn.
81: .Tp Fl k
82: The
83: .FL k
84: option requests rlogin to obtain tickets for the remote host
85: in realm
86: .Ar realm
87: instead of the remote host's realm as determined by
88: .Xr krb_realmofhost 3 .
89: .Tp
90: .Pp
91: A line of the form ``<escape char>.'' disconnects from the remote host.
92: Similarly, the line ``<escape char>^Z'' will suspend the
93: .Nm rlogin
94: session, and ``<escape char><delayed-suspend char>'' suspends the
95: send portion of the rlogin, but allows output from the remote system.
96: By default, the tilde (``~'') character is the escape character, and
97: normally control-Y (``^Y'') is the delayed-suspend character.
98: .Pp
99: All echoing takes place at the remote site, so that (except for delays)
100: the
101: .Nm rlogin
102: is transparent.
103: Flow control via ^S/^Q and flushing of input and output on interrupts
104: are handled properly.
105: .Sh KERBEROS AUTHENTICATION
106: Each user may have a private authorization list in the file
107: .Pa .klogin
108: in their home directory.
109: Each line in this file should contain a Kerberos principal name of the
110: form
111: .Ar principal.instance@realm .
112: If the originating user is authenticated to one of the principals named
113: in
114: .Pa .klogin ,
115: access is granted to the account.
116: The principal
117: .Ar accountname.@localrealm
118: is granted access if
119: there is no
120: .Pa .klogin
121: file.
122: Otherwise a login and password will be prompted for on the remote machine
123: as in
124: .Xr login 1 .
125: To avoid certain security problems, the
126: .Pa .klogin
127: file must be owned by
128: the remote user.
129: .Pp
130: If Kerberos authentication fails, a warning message is printed and the
131: standard Berkeley
132: .Em rlogin
133: is used instead.
134: .Sh ENVIRONMENT
135: The following environment variable is utilized by
136: .Nm rlogin :
137: .Tw Fl
138: .Tp Ev TERM
139: to find user's terminal type.
140: .Tp
141: .Sh SEE ALSO
142: .Xr rsh 1 ,
143: .Xr kerberos 3 ,
144: .Xr krb_sendauth 3 ,
145: .Xr krb_realmofhost 3
146: .Sh HISTORY
147: .Nm Rlogin
148: appeared in 4.2 BSD.
149: .Sh BUGS
150: .Nm Rlogin
151: will be replaced by
152: .Xr telnet 1
153: in the near future.
154: .Pp
155: More of the environment should be propagated.
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