External and Internal Service Access

Hi all,

Got a service running on a mac mini, FileMaker to be precise.

FileMaker utilises the ports 80, 443, 5003. These ports are forwarded in our router, a Netgear BR500.

​

If you access our static external IP from outside our network, you get the FileMaker web page. Which is correct.

However if you access the same IP but whilst on our network, you get the login page for the router.

​

Any ideas as to what I need to set up or change to enable people on the internal network to access the service using the external IP.

As far as I'm aware, the router supports NAT loopback, although there are no settings in the web gui to change.

​

For the purposes of this question, lets assume the following IP addresses;

Mac Mini FileMaker Server - 192.168.10.100 - Ports 80, 443, 5003

External IP - 80.80.80.80

​

Any help would be greatly appreciated.