InetDisable

From DeRamp:

InetDisable is an Internet access scheduler that lets you specify, for each day of the week, the periods throughout the day during which Internet access is enabled or disabled on the kids' computer. InetDisable offers several key benefits versus typical Internet scheduling programs:

• Presence of InetDisable is transparent to the end user. The user does not have to log in, log out, enter passwords, etc. InetDisable does not require the administrator (you) to maintain a list of applications that should be monitored. It will automatically monitor any new browsing, chat or music programs your children may install.
• InetDisable disables all Internet related traffic including browsing, instant messaging, music servers, FTP downloads, etc.
• InetDisable keeps your computer's time and date in sync with a national time standard. This prevents tampering with the computer's time in order to bypass the schedule.
• It is difficult to figure out how to bypass InetDisable.
• InetDisable is a small and unobtrusive software package that uses very little of your computer's resources. It is not a "packet sniffer" with the associated overhead of inspecting all Internet traffic. Nor does InetDisable require "hooks" into low level system software in order to work. This means InetDisable uses very little processing power, offers better compatibility with firewall and anti-virus software, and better system stability than many Internet filtering programs.