How to automatically display a notice page when the main web server doesn't respond anymore ?

Question

Is there a way to display automatically an HTML "maintenance notice" page when the main web server is down or doesn't respond anymore on the 80 port ?

I guess it's an app that should do the job...

Note : the "main web server" is not IIS.

Answer 1

What you want is perhaps some kind of script that will check the main server on a regular basis, for example with wget.

If there's a response, all fine.

If there isn't, you have to redirect traffic to another server that will display the maintenance notice. How to do this depends on your setup, for example if you're behind NAT you could alter it so a connection to port 80 points to the backup server.