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Darcy Brodie wrote:
> Hello everyone
>
> I have been trying to find a simple solution for an on going problem.
>
> I have a Linux based firewall / router located out of town. It connects
> to the Internet via a satellite connection (the only other option is
> dial-up internet)
> Due to several factors, at times the connection can be less than
> favorable, and we have to go and manually obtain the IP address from
> the ISP (after someone discovers that there is no connection again)
> When I am there, I have found is that simply restarting the network
> service will re-establish the connection.
>
>
> Is there a way. that the Linux machine can monitor the status of the
> incoming connection from the ISP, and attempt to restore the connection
> if it is lost? And continue to attempt to re-connect to the ISP until
> connection is restored (sometimes, this can be hours due to weather).
>
I have done something similar in the past. A simple shell script that
cron runs every 5 minutes was my solution.
In my shell script was a function:
CheckNet ()
{
ping -c 1 $PINGHOST >& /dev/null ; # Checking to see if we have net
connectivity to the backup server
}
Then based on the success or failure the script did something else. On
a Debian or Ubuntu machine, you could restart the interface with the
following commands:
ifdown eth0
ifup eth0
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