i was able to configure apache as a frontend for the network monitor web interface using the steps on this link. https://kb.paessler.com/en/topic/42193-using-apache-webserver-as-ssl-proxy-for-prtg
so now network monitor (eg: 10.10.10.10) is frontended on apache running on another server (eg. 10.10.10.11) .
the problem we face is when looking at historic data using the interface on 10.10.10.11. the page and the numbers show up, but the graph will not display.
the graph works if we login to the web interface of network monitor directly (10.10.10.10)., and once we login, then if i use the apache URL (10.10.10.11) then the historic data page will shows the graph correctly.
is there any way to fix this? as we are using the apache frontend for external access to the network monitor.