When monitoring a website from behind the firewall and load balancer we monitor each website that answers with a FQDN that lists' its public IP address. For example we may have five web servers all hosting abc.com in the IP range 172.20.0.0/16. While abc.com may resolve to 184.108.40.206 we need to query each server on the 172.20.0.0/16 network to check on the health of each web server and their ability to load the website properly.
It would be great to have the HTTP sensors to support two fields: servername: internal DNS name or IP address of a server to monitor connect: the FQDN the HTTP sensor should submit to the servername to load the website.
This way we can test the same FQDN on each web server internally.