04-07-2015
Assuming that you are not using ssh at all, can I presume that rlogin would be allowed? You can grant (for a given user) the source addresses that can rlogin to it without further credentials being required.
Does that offer an option? I would try to avoid expect if possible because of the risks and complexities that it introduces.
Robin
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LEARN ABOUT CENTOS
rlogin
RLOGIN(1) BSD General Commands Manual RLOGIN(1)
NAME
rlogin -- remote login
SYNOPSIS
rlogin [-8EKLdx] [-e char] [-l username] host
DESCRIPTION
Rlogin starts a terminal session on a remote host host.
The standard Berkeley rhosts authorization mechanism is used. The options are as follows:
-8 The -8 option allows an eight-bit input data path at all times; otherwise parity bits are stripped except when the remote side's stop
and start characters are other than ^S/^Q .
-E The -E option stops any character from being recognized as an escape character. When used with the -8 option, this provides a com-
pletely transparent connection.
-L The -L option allows the rlogin session to be run in ``litout'' (see tty(4)) mode.
-d The -d option turns on socket debugging (see setsockopt(2)) on the TCP sockets used for communication with the remote host.
-e The -e option allows user specification of the escape character, which is ``~'' by default. This specification may be as a literal
character, or as an octal value in the form
nn.
A line of the form ``<escape char>.'' disconnects from the remote host. Similarly, the line ``<escape char>^Z'' will suspend the rlogin ses-
sion, and ``<escape char><delayed-suspend char>'' suspends the send portion of the rlogin, but allows output from the remote system. By
default, the tilde (``~'') character is the escape character, and normally control-Y (``^Y'') is the delayed-suspend character.
All echoing takes place at the remote site, so that (except for delays) the rlogin is transparent. Flow control via ^S/^Q and flushing of
input and output on interrupts are handled properly.
ENVIRONMENT
The following environment variable is utilized by rlogin:
TERM Determines the user's terminal type.
SEE ALSO
rsh(1),
HISTORY
The rlogin command appeared in 4.2BSD.
BUGS
Rlogin will be replaced by telnet(1) in the near future.
More of the environment should be propagated.
Linux NetKit (0.17) August 15, 1999 Linux NetKit (0.17)