We have 2 Proxy Servers connected to different Telcos. We manually configure the proxy on the browser and if one fails, we change the browser proxy setting manually. Our users users can choose which ever proxy they want to connect to.
How do I configure PRTG so that it will check if internet access is working fine on each proxy. This is not just a normal ping check but PRTG should try to access a certain website through the proxy servers so that if internet browsing is blocked or not working for some reason, then PRTG will send out the notification.