Re: mgetty "auto-telnet" ??
Tim Sailer wrote:
> In your email to me, Jens B. Jorgensen, you wrote:
> > > Do you have any idea on how to setup mgetty to automatically telnet an
> > > incoming connection to another system. (i.e. anyone connecting to ttyS31
> > > should be automatically telnetted to aaa.bbb.ccc.ddd.)
> > >
> > Yes. mgetty will still prompt them for a login, but after that it will
> > run telnet to the remote machine and as long as the remote telnetd
> > supports the ENVIRON option the user will not have to type their
> > login twice. You need to edit the file /etc/mgetty/login.config.
> > This file controls what program is launched by getty (usually
> > /bin/login). The first field in each (non-comment) line matches the
> > user name and the use of '*' for a wildcard is allowed. Ordinarily
> > there's a line at the end (the first matching line in the file is
> > used) like this:
> > * - - /bin/login @
> > Which means that any user logging in which doesn't match a previous
> > entry will have /bin/login started for them. The '@' just passes
> > the user name. You should replace this line with:
> > * - - /usr/bin/telnet -8 -E -a -l @ target-machine
> > Actually you may want to consider (for extra security)
> > * nobody nobody /usr/bin/telnet -8 -E -a -l @ target-machine
> > Since otherwise telnet will run as root (although -E prevents the
> > telnet "escape" which would allow a user to run a program).
> This works as you state. However, he wants per port control to where
> ther telnet. I don't think this is possible.
Come on, we're talking about *Linux* here, not Winbloze95 or NT.
No problema. Instead of
* - - /usr/bin/telnet -8 -E -a -l @ target-machine
* - - /etc/mytelnetshim.sh @
And here's what /etc/mytelnetshim.sh looks like:
case `/usr/bin/tty` in
/dev/ttyS0) exec /usr/bin/telnet -8 -E -a -l $1 target-machine-1;;
/dev/ttyS1) exec /usr/bin/telnet -8 -E -a -l $1 target-machine-2;;
/dev/ttyS2) exec /usr/bin/telnet -8 -E -a -l $1 target-machine-3;;
/dev/ttyS3) exec /usr/bin/telnet -8 -E -a -l $1 target-machine-4;;
/dev/ttyS4) exec /usr/bin/telnet -8 -E -a -l $1 target-machine-5;;
Jens B. Jorgensen
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