Deny access to GUI

From:	"Brieseneck, Arne, VF-Group" <Arne dot Brieseneck at vodafone dot com>
To:	<m0n0wall at lists dot m0n0 dot ch>
Subject:	Deny access to GUI
Date:	Thu, 14 Jan 2010 21:26:21 +0100

Folks, I try to disable the access to the GUI from the OPT1 interface. 
Unfortunately I can do what, you still have access when you are in the
OPT1 network.

GUI is supposed to run only on LAN interface, but is accessible from
everywhere.

OPT1 interface is configured as DHCP server with DNS forwarder for
customers access.

Any hints?