Annotation of src/usr.bin/rlogin/rlogin.1, Revision 1.8
1.8 ! aaron 1: .\" $OpenBSD: rlogin.1,v 1.7 2000/11/09 17:52:32 aaron Exp $
1.1 deraadt 2: .\" $NetBSD: rlogin.1,v 1.4 1995/08/18 15:07:35 pk Exp $
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35: .\" @(#)rlogin.1 8.1 (Berkeley) 6/6/93
36: .\"
37: .Dd June 6, 1993
38: .Dt RLOGIN 1
1.5 aaron 39: .Os
1.1 deraadt 40: .Sh NAME
41: .Nm rlogin
42: .Nd remote login
43: .Sh SYNOPSIS
44: .Ar rlogin
45: .Op Fl 8EKLdx
46: .Op Fl e Ar char
47: .Op Fl k Ar realm
48: .Op Fl l Ar username
49: .Ar host
50: .Sh DESCRIPTION
1.6 aaron 51: .Nm
1.1 deraadt 52: starts a terminal session on a remote host
1.6 aaron 53: .Ar host .
1.1 deraadt 54: .Pp
1.6 aaron 55: .Nm
1.1 deraadt 56: first attempts to use the Kerberos authorization mechanism, described below.
1.4 aaron 57: If the remote host does not support Kerberos the standard Berkeley
1.1 deraadt 58: .Pa rhosts
59: authorization mechanism is used.
1.6 aaron 60: .Pp
1.1 deraadt 61: The options are as follows:
1.7 aaron 62: .Bl -tag -width Ds
1.1 deraadt 63: .It Fl 8
64: The
65: .Fl 8
66: option allows an eight-bit input data path at all times; otherwise
67: parity bits are stripped except when the remote side's stop and start
68: characters are other than
69: ^S/^Q .
70: .It Fl E
71: The
72: .Fl E
73: option stops any character from being recognized as an escape character.
74: When used with the
75: .Fl 8
76: option, this provides a completely transparent connection.
77: .It Fl K
78: The
79: .Fl K
80: option turns off all Kerberos authentication.
81: .It Fl L
82: The
83: .Fl L
1.6 aaron 84: option allows the rlogin session to be run in
85: .Dq litout
86: (see
1.1 deraadt 87: .Xr tty 4 )
88: mode.
89: .It Fl d
90: The
91: .Fl d
92: option turns on socket debugging (see
93: .Xr setsockopt 2 )
94: on the TCP sockets used for communication with the remote host.
1.4 aaron 95: .It Fl e Ar char
1.1 deraadt 96: The
97: .Fl e
98: option allows user specification of the escape character, which is
1.6 aaron 99: .Ql ~
100: by default.
1.1 deraadt 101: This specification may be as a literal character, or as an octal
102: value in the form \ennn.
1.4 aaron 103: .It Fl k Ar realm
1.1 deraadt 104: The
105: .Fl k
106: option requests rlogin to obtain tickets for the remote host
107: in realm
108: .Ar realm
109: instead of the remote host's realm as determined by
1.6 aaron 110: .Xr krb_realmofhost 3 .
1.1 deraadt 111: .It Fl x
112: The
113: .Fl x
114: option turns on
115: .Tn DES
116: encryption for all data passed via the
117: rlogin session.
118: This may impact response time and
119: .Tn CPU
120: utilization, but provides
121: increased security.
1.4 aaron 122: .It Fl l Ar username
1.3 deraadt 123: The
124: .Fl l
125: option specifies a different
126: .Ar username
127: for the remote login.
128: If this option is not specified, your local username will be used.
1.1 deraadt 129: .El
130: .Pp
1.6 aaron 131: A line of the form
132: .Dq <escape char>.
133: disconnects from the remote host.
134: Similarly, the line
135: .Dq <escape char>^Z
136: will suspend the
137: .Nm
138: session, and
139: .Dq <escape char><delayed-suspend char>
140: suspends the
1.1 deraadt 141: send portion of the rlogin, but allows output from the remote system.
1.6 aaron 142: By default, the tilde
143: .Pq Ql ~
144: character is the escape character, and
145: normally control-Y
146: .Pq Ql ^Y
147: is the delayed-suspend character.
1.1 deraadt 148: .Pp
149: All echoing takes place at the remote site, so that (except for delays)
150: the
1.6 aaron 151: .Nm
1.1 deraadt 152: is transparent.
153: Flow control via ^S/^Q and flushing of input and output on interrupts
154: are handled properly.
155: .Sh KERBEROS AUTHENTICATION
156: Each user may have a private authorization list in the file
157: .Pa .klogin
158: in their home directory.
159: Each line in this file should contain a Kerberos principal name of the
160: form
1.6 aaron 161: .Ar principal.instance@realm .
1.1 deraadt 162: If the originating user is authenticated to one of the principals named
163: in
164: .Pa .klogin ,
165: access is granted to the account.
166: The principal
167: .Ar accountname.@localrealm
168: is granted access if
169: there is no
170: .Pa .klogin
171: file.
172: Otherwise a login and password will be prompted for on the remote machine
173: as in
1.6 aaron 174: .Xr login 1 .
1.1 deraadt 175: To avoid certain security problems, the
176: .Pa .klogin
177: file must be owned by
178: the remote user.
179: .Pp
180: If Kerberos authentication fails, a warning message is printed and the
181: standard Berkeley
1.6 aaron 182: .Nm
1.1 deraadt 183: is used instead.
184: .Sh ENVIRONMENT
185: .Bl -tag -width TERM
186: .It Ev TERM
187: Determines the user's terminal type.
188: .El
189: .Sh SEE ALSO
190: .Xr rsh 1 ,
191: .Xr kerberos 3 ,
1.4 aaron 192: .Xr krb_realmofhost 3 ,
193: .Xr krb_sendauth 3
1.1 deraadt 194: .Sh HISTORY
195: The
196: .Nm rlogin
197: command appeared in
198: .Bx 4.2 .
199: .Sh BUGS
1.4 aaron 200: .Nm rlogin
1.1 deraadt 201: will be replaced by
1.6 aaron 202: .Xr telnet 1
1.1 deraadt 203: in the near future.
204: .Pp
205: More of the environment should be propagated.
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