heimdal-rshd (8) Linux Manual Page

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.