Running a recovery task on a server in the DMZ

Hi everybody,

I have a website monitor that we want to automatically respond with an iisreset when the site shows a 500 or 404 error. When the monitor alerts the alert does not come from the webserver, so how can the response know to target the server, which is behind a firewall.

If it was on the internal LAN then I could trigger a remote iisreset using a script targetted at the server I know hosts the website.

Is there a way I can write a script that uses SCOM and targets the web server in the DMZ and uses the port 5723 that already has access to the box?

Example high level of the script: 

Use server WEBSERVER-DMZ1, run iisreset.

Any help or a point in the right direction would be greatly appreciated.

Thankyou,

Michael