Okay, after some more digging i found somethign useful and just in case anyone else reads this post and has the same question... check out the thread below:
Thanks for the link to the thread you provided. Like you, I was looking for that solution.
From the other thread about the same issue
It is not very complicated. If you just want to access FileMaker Server from outside you need to do two things (assuming that your network has at least 1 fixed IP number). Both should be done via the admin console to your FireWall:
- Route you external ip number xxx.xxx.xxx to your internal IP number (the internal number probably looks like 192.168.X.X or 10.10.X.X or close to that).
- Open port 5300 to that number.
Thats about it.
You can make life easier by making a dns a-record to your external IP number like fx: fmpro.domainname.com
If you want to do more with your FileMaker you need this information:
Purpose Port Comments FileMaker Pro to Server 5300 The only one needed if you just want to get access to FileMaker Administration Console and Admin Page 16000 & 16001 To administrate the FileMaker Server through the FireWall (consider not permitting this) WPE Engine in a two/three machine deployment 5003 & 16000 If there is a firewall between the DB Server and the WPE, then you need to have those ports open between them.
You may need other ports as well for more advanced setups. Have a look at fmsolutionspro , if you are ot handling your FireWall yourself you can use this diagramme to show and explain to your FW responsible (hope it is OK for fmsolutions to show it here):