I want to separate out one port on my router so that it can access the internet but not anything on my LAN. It seems I can do this by putting it in it's own vlan like in the instructions here: http://coderazzi.net/howto/openwrt/tl841n/vlans.htm
Since the Gargoyle web UI does not have VLAN settings, I would be editting the files directly. Can I prevent the web UI from overwriting my changes?