I am running Filemaker Pro 9 by the way........
You have a DSL modem or router OR you have a Cable modem or router.
(modem has one ethernet port, usually - router has four or more ethernet ports)
You may have a router connected to the modem that provides more ethernet ports and or wireless.
A request from outside your LAN (local area network) for the IP address and port http://184.108.40.206:591 goes to your router. Your router is not running FMP. The request is ignored with or without an error message.
The specifics depend on the model of your router and the specific firewall being used.
That's really helpful and I realise more now what is happening, thank you for taking the time to explain, I will look into this more and see if I can resolve, if I get stuck I will advise in case you are able to help further
Really do appreciate your advice thank you!
I have done it! Thank you for pointing me in the right direction!