Oh and one more thing - I'm assuming your daughter's machine has a public IP address yes? If so then have you considered the tracking potential of that? I'm not into security now but it'll be obvious that the address is part of an allocated block so its a fair bet that each IP address is a specific machine. If you have a machine already running Smoothwall then you might be better NATing her behind that - I think that was possible (Routed + NAT) but I can't remember. It should just look like a NAT router to anyone curious.
In my first post I put
"My set up = ADSL with 6 Ip Address's, Router (With NAT firewall turned off), Smoothwall hardware firewall, switch, network."
With the ADSL router before smoothwall you have to turn off the 'NAT' firewall and have smoothwall doing all the NATing, Hence my block of IP's are to make all this work (Set up with the advice of the guys and girls of the smoothwall forum).
So all of my machines are back of the smoothwall firewall.
I have scanned my network with the 'Shields up' web site
www.grc.com/ and it does not exist.
Thinking more about what is displayed on my daughters forum sites she goes on, It may be like this site were only the mods and yourself see your own IP Address .
While see is chatting to her friends I will get her to ask if any one can see our IP Address.