1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
.\" Things to fix:
.\" * remove Op from mandatory flags
.\" * use better macros for arguments (like .Pa for files)
.\"
.Dd July 31, 2001
.Dt RSHD 8
.Os HEIMDAL
.Sh NAME
.Nm rshd
.Nd
remote shell server
.Sh SYNOPSIS
.Nm
.Op Fl aiklnvxPL
.Op Fl p Ar port
.Sh DESCRIPTION
.Nm
is the server for
the
.Xr rsh 1
program. It provides an authenticated remote command execution
service. Supported options are:
.Bl -tag -width Ds
.It Xo
.Fl n ,
.Fl -no-keepalive
.Xc
Disables keep-alive messages. Keep-alives are packets sent a certain
interval to make sure that the client is still there, even when it
doesn't send any data.
.It Xo
.Fl k ,
.Fl -kerberos
.Xc
Assume that clients connecting to this server will use some form of
Kerberos authentication. See the
.Sx EXAMPLES
section for a sample
.Xr inetd.conf 5
configuration.
.It Xo
.Fl x ,
.Fl -encrypt
.Xc
For Kerberos 4 this means that the connections are encrypted. Kerberos
5 will negotiate encryption inline. This option implies
.Fl k .
.\".It Xo
.\".Fl l ,
.\".Fl -no-rhosts
.\".Xc
.\"When using old port-based authentication, the user's
.\".Pa .rhosts
.\"files are normally checked. This options disables this.
.It Xo
.Fl v ,
.Fl -vacuous
.Xc
If the connecting client does not use any Kerberised authentication,
print a message that complains about this fact, and exit. This is
helpful if you want to move away from old port-based authentication.
.It Xo
.Fl P
.Xc
When using the AFS filesystem, users' authentication tokens are put in
something called a PAG (Process Authentication Group). Multiple
processes can share a PAG, but normally each login session has its own
PAG. This option disables the
.Fn setpag
call, so all tokens will be put in the default (uid-based) PAG, making
it possible to share tokens between sessions. This is only useful in
peculiar environments, such as some batch systems.
.It Xo
.Fl i ,
.Fl -no-inetd
.Xc
The
.Fl i
option will cause
.Nm
to create a socket, instead of assuming that its stdin came from
.Xr inetd 8 .
This is mostly useful for debugging.
.It Xo
.Fl p Ar port ,
.Fl -port= Ns Ar port
.Xc
Port to use with
.Fl i .
.It Xo
.Fl a
.Xc
This flag is for backwards compatibility only.
.It Xo
.Fl L
.Xc
This flag enables logging of connections to
.Xr syslogd 8 .
This option is always on in this implementation.
.El
.\".Sh ENVIRONMENT
.Sh FILES
.Bl -tag -width /etc/hosts.equiv -compact
.It Pa /etc/hosts.equiv
.It Pa ~/.rhosts
.El
.Sh EXAMPLES
The following can be used to enable Kerberised rsh in
.Xr inetd.cond 5 ,
while disabling non-Kerberised connections:
.Bd -literal
shell stream tcp nowait root /usr/libexec/rshd rshd -v
kshell stream tcp nowait root /usr/libexec/rshd rshd -k
ekshell stream tcp nowait root /usr/libexec/rshd rshd -kx
.Ed
.\".Sh DIAGNOSTICS
.Sh SEE ALSO
.Xr rsh 1 ,
.Xr iruserok 3
.\".Sh STANDARDS
.Sh HISTORY
The
.Nm
command appeared in
.Bx 4.2 .
.Sh AUTHORS
This implementation of
.Nm
was written as part of the Heimdal Kerberos 5 implementation.
.\".Sh BUGS
|
