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rshd

BSD mandoc
HEIMDAL

NAME

rshd - remote shell server

SYNOPSIS

[-aiklnvxPL ] [-p port ]

DESCRIPTION

is the server for the rsh(1) program. It provides an authenticated remote command execution service. Supported options are:

-n --no-keepalive

Disables keep-alive messages. Keep-alives are packets sent at certain intervals to make sure that the client is still there, even when it doesn't send any data.

-k --kerberos

Assume that clients connecting to this server will use some form of Kerberos authentication. See the Sx EXAMPLES section for a sample inetd.conf5 configuration.

-x --encrypt

For Kerberos 4 this means that the connections are encrypted. Kerberos 5 can negotiate encryption even without this option, but if it's present will deny unencrypted connections. This option implies -k

-v --vacuous

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.

-P

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.

-i --no-inetd

The -i option will cause to create a socket, instead of assuming that its stdin came from inetd(8). This is mostly useful for debugging.

-p port --port= port

Port to use with -i

-a

This flag is for backwards compatibility only.

-L

This flag enables logging of connections to syslogd(8). This option is always on in this implementation.

FILES

/etc/hosts.equiv

~/.rhosts

EXAMPLES

The following can be used to enable Kerberised rsh in inetd.cond5, while disabling non-Kerberised connections:

 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
 

SEE ALSO

rsh(1), iruserok(3)

HISTORY

The command appeared in BSD 4.2

AUTHORS

This implementation of was written as part of the Heimdal Kerberos 5 implementation.