Hi all. we have one of these hitron modems just installed today. Single static IP. Virgin business.
I just need to be able to forward a port to an internal device, which ive done OK, BUT how do i make that rule only port forward IF the request is coming from a particular public IP. Its pretty bad just to port forward to a device inside the local network from any external IP. IE if someone does a port scan and sees a port open, they could try prying a bit. However, with a rule set up to only send packets back to a particular IP (as i want to do) , the hacker would never get a reply back.
Its a pretty simple firewall/portforward request, mist firewalls/routers will do this, but this hitron device seem pretty limited. Has anyone done this? thanks all!! :-))