On Tue, Apr 15, 2008 at 11:33:54AM +0000, tony.chamberlain@xxxxxxxxx wrote:
>
>
>
> The following is for CentOS 4.5
> We have an internal network (192.168.5.0/255.255.255.0).
> We have one machine reachable from inside and outside
> (NOT on the 192.168.5 network). Just for this example
> call it 10.20.30.40 (though that is not its real address.
> I don't put the real address, for security concerns here).
> Anyway my machine is 192.168.5.19 so from my machine
> I do an
> ssh -l root -R 10022:127.0.0.1:22 10.20.30.40
> Then I log into 10.20.30.40 from another machine and do a
> ssh -l tony -p 10022 127.0.0.1
> which gets me into my machine. Test passes. Problem is, by
> the time I get home, my ssh -l root -R 10022:127.0.0.1:22 10.20.30.40
> has timed out or something and I can no longer get to my local machine.
> Do you know what I can do to keep it from timing out (or maybe locking up)?
> I do have root access to both machines so if there is something in
> sshd_config to change, I can do it.
I have a cron job which runs the script below every 15 minutes to see if
the ssh is still running and restart it if it isn't:-
#
#
# Script to set up a secure tunnel from home system
#
cn=`ps -ef | grep "ssh -l chris -R 50022:apollo:22 -N xx.yy.zz.aa" |
grep -v 'grep ssh'`
if [ -n "$cn" ]
then
echo `date` "hssh is running" >/home/chris/tmp/hssh.log
else
/proj/chris/bin/ssh -l chris -R 50022:apollo:22 -N xx.yy.zz.aa
fi
It means that even if there *is* a connection which has got screwed
up for some reason I can kill the ssh running on my home machine and
within 15 minutes the cron job and script above will start a new
session.
--
Chris Green
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