I need to monitor how a webserver responds to a "GET /test" request using a specific host header value.
I'm pretty sure I've already used this before, but now I can't for the life of me find out how to do it with either the HTTP Sensor, HTTP Advanced, or HTTP Full Web Page.
My device is created with a specific IP address 10.230.50.50 which is the IP I want to monitor.
The hostname I need to ask about is foo.bar.com which in DNS points to 10.230.40.40, but I don't want to have anything to do with that IP address.
I've tried all of the sensors and the only way I can get the PRTG probe to connect to 10.230.50.50 instead of 10.230.40.40 is by using "http://10.230.50.50" in the URL field, but of course then I can't monitor the correct site since "10.230.50.50" is used as a host header. The "Custom header" field doesn't accept "host" headers so I can't specify it there either.
I'm tcpdumping the traffic on the PRTG probe to verify if the request is sent to 40.40 or 50.50.
So how are anyone able to monitor HTTP on loadbalancer nodes, reverse proxies etc with PRTG?