Date: Mon, 09 Nov 2009 12:30:33 -0600 From: Kevin Kinsey <kdk@daleco.biz> To: freebsd-questions <freebsd-questions@freebsd.org> Subject: Remote ssh tunnel in background or script? Message-ID: <4AF85FC9.10103@daleco.biz>
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Greetings!
I have a client who recently dropped static IP service in
favor of a "cheaper" solution, so they're now on a DHCP network
blocking port 25, etc.
In order to continue to allow them to connect to an outbound
SMTP box on the LAN, I've done this on their server:
sudo ssh -L thisbox:24:remotebox:52525 me@remotebox
I've got Sendmail listening there on 52525, and it works
fine; the local clients are told to connect to "thisbox"
port 24. The only issue is that I have to run it from
a terminal session. When I tried to bg the process ("cmdstring &")
it doesn't work, exactly. I've gotten an error message
at times*, and at other times I apparently get "thisbox"
listening on port 24 but it's not an SMTP daemon that's
listening.
I have a feeling it's cause I'm in csh, which is notorious
for backgrounding issues. <?> At any rate, what I'd
like to do is have a script set up the connection, or
write some daemon that would monitor the connection and
fix it if it gets reset. At any rate, if I could get this
SSH process to detach from a terminal, it'd be great.
Any suggestions?
Kevin Kinsey
* I'm sorry, but I can't reproduce the error message
this morning. IIRC, something to the effect of
"I can't do nothing, give me a command please?"
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