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1 | .\" Copyright (c) 1983, 1990 The Regents of the University of California. |
2 | .\" All rights reserved. | |
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5 | .\" modification, are permitted provided that the following conditions | |
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7 | .\" 1. Redistributions of source code must retain the above copyright | |
8 | .\" notice, this list of conditions and the following disclaimer. | |
9 | .\" 2. Redistributions in binary form must reproduce the above copyright | |
10 | .\" notice, this list of conditions and the following disclaimer in the | |
11 | .\" documentation and/or other materials provided with the distribution. | |
12 | .\" 3. All advertising materials mentioning features or use of this software | |
13 | .\" must display the following acknowledgement: | |
14 | .\" This product includes software developed by the University of | |
15 | .\" California, Berkeley and its contributors. | |
16 | .\" 4. Neither the name of the University nor the names of its contributors | |
17 | .\" may be used to endorse or promote products derived from this software | |
18 | .\" without specific prior written permission. | |
19 | .\" | |
20 | .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
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23 | .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
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25 | .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
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30 | .\" SUCH DAMAGE. | |
31 | .\" | |
32 | .\" @(#)rlogin.1 6.19 (Berkeley) 7/27/91 | |
33 | .\" | |
34 | .Dd July 27, 1991 | |
35 | .Dt RLOGIN 1 | |
36 | .Os BSD 4.2 | |
37 | .Sh NAME | |
38 | .Nm rlogin | |
39 | .Nd remote login | |
40 | .Sh SYNOPSIS | |
41 | .Ar rlogin | |
42 | .Op Fl 8EKLdx | |
43 | .Op Fl e Ar char | |
44 | .Op Fl k Ar realm | |
45 | .Op Fl l Ar username | |
46 | .Ar host | |
47 | .Sh DESCRIPTION | |
48 | .Nm Rlogin | |
49 | starts a terminal session on a remote host | |
50 | .Ar host . | |
51 | .Pp | |
52 | .Nm Rlogin | |
53 | first attempts to use the Kerberos authorization mechanism, described below. | |
54 | If the remote host does not supporting Kerberos the standard Berkeley | |
55 | .Pa rhosts | |
56 | authorization mechanism is used. | |
57 | The options are as follows: | |
58 | .Bl -tag -width flag | |
59 | .It Fl 8 | |
60 | The | |
61 | .Fl 8 | |
62 | option allows an eight-bit input data path at all times; otherwise | |
63 | parity bits are stripped except when the remote side's stop and start | |
64 | characters are other than | |
65 | ^S/^Q . | |
66 | .It Fl E | |
67 | The | |
68 | .Fl E | |
69 | option stops any character from being recognized as an escape character. | |
70 | When used with the | |
71 | .Fl 8 | |
72 | option, this provides a completely transparent connection. | |
73 | .It Fl K | |
74 | The | |
75 | .Fl K | |
76 | option turns off all Kerberos authentication. | |
77 | .It Fl L | |
78 | The | |
79 | .Fl L | |
80 | option allows the rlogin session to be run in ``litout'' (see | |
81 | .Xr tty 4 ) | |
82 | mode. | |
83 | .It Fl d | |
84 | The | |
85 | .Fl d | |
86 | option turns on socket debugging (see | |
87 | .Xr setsockopt 2 ) | |
88 | on the TCP sockets used for communication with the remote host. | |
89 | .It Fl e | |
90 | The | |
91 | .Fl e | |
92 | option allows user specification of the escape character, which is | |
93 | ``~'' by default. | |
94 | This specification may be as a literal character, or as an octal | |
95 | value in the form \ennn. | |
96 | .It Fl k | |
97 | The | |
98 | .FL k | |
99 | option requests rlogin to obtain tickets for the remote host | |
100 | in realm | |
101 | .Ar realm | |
102 | instead of the remote host's realm as determined by | |
103 | .Xr krb_realmofhost 3 . | |
104 | .It Fl x | |
105 | The | |
106 | .Fl x | |
107 | option turns on | |
108 | .Tn DES | |
109 | encryption for all data passed via the | |
110 | rlogin session. | |
111 | This may impact response time and | |
112 | .Tn CPU | |
113 | utilization, but provides | |
114 | increased security. | |
115 | .El | |
116 | .Pp | |
117 | A line of the form ``<escape char>.'' disconnects from the remote host. | |
118 | Similarly, the line ``<escape char>^Z'' will suspend the | |
119 | .Nm rlogin | |
120 | session, and ``<escape char><delayed-suspend char>'' suspends the | |
121 | send portion of the rlogin, but allows output from the remote system. | |
122 | By default, the tilde (``~'') character is the escape character, and | |
123 | normally control-Y (``^Y'') is the delayed-suspend character. | |
124 | .Pp | |
125 | All echoing takes place at the remote site, so that (except for delays) | |
126 | the | |
127 | .Nm rlogin | |
128 | is transparent. | |
129 | Flow control via ^S/^Q and flushing of input and output on interrupts | |
130 | are handled properly. | |
131 | .Sh KERBEROS AUTHENTICATION | |
132 | Each user may have a private authorization list in the file | |
133 | .Pa .klogin | |
134 | in their home directory. | |
135 | Each line in this file should contain a Kerberos principal name of the | |
136 | form | |
137 | .Ar principal.instance@realm . | |
138 | If the originating user is authenticated to one of the principals named | |
139 | in | |
140 | .Pa .klogin , | |
141 | access is granted to the account. | |
142 | The principal | |
143 | .Ar accountname.@localrealm | |
144 | is granted access if | |
145 | there is no | |
146 | .Pa .klogin | |
147 | file. | |
148 | Otherwise a login and password will be prompted for on the remote machine | |
149 | as in | |
150 | .Xr login 1 . | |
151 | To avoid certain security problems, the | |
152 | .Pa .klogin | |
153 | file must be owned by | |
154 | the remote user. | |
155 | .Pp | |
156 | If Kerberos authentication fails, a warning message is printed and the | |
157 | standard Berkeley | |
158 | .Nm rlogin | |
159 | is used instead. | |
160 | .Sh ENVIRONMENT | |
161 | The following environment variable is utilized by | |
162 | .Nm rlogin : | |
163 | .Bl -tag -width TERM | |
164 | .It Ev TERM | |
165 | Determines the user's terminal type. | |
166 | .El | |
167 | .Sh SEE ALSO | |
168 | .Xr rsh 1 , | |
169 | .Xr kerberos 3 , | |
170 | .Xr krb_sendauth 3 , | |
171 | .Xr krb_realmofhost 3 | |
172 | .Sh HISTORY | |
173 | The | |
174 | .Nm rlogin | |
175 | command appeared in | |
176 | .Bx 4.2 . | |
177 | .Sh BUGS | |
178 | .Nm Rlogin | |
179 | will be replaced by | |
180 | .Xr telnet 1 | |
181 | in the near future. | |
182 | .Pp | |
183 | More of the environment should be propagated. |