webecho 0 Newbie Poster

I have 5 computers networked and running CyberCafePro (v4.5).
1 Computer with the CCP server on is in the office, the other 4 PC's are at the other end of the building running the CCP clients.

The main issue is that guests are able to remove the network cable from the back of the desktops, plug it into a latop and access the internet freely.
Access is available 24hrs a day and cannot be visually overseen.

I need a way of securing the network access by IP or MAC address I guess.

All computers are running WinXP SP2, router s Belkin and ADSL router is NetComm NB1300.

CCP doesn't offer any options to help with this.

Thanks in advance

Webecho