I recently read on Lifehacker about a system called ScrubIT which blocks pornography on your system. Here is what Lifehacker has to say:

All you do is configure your router to use ScrubIT’s DNS servers. Alternately, Windows 2000/XP users can download a utility that tweaks the networking settings accordingly.

I thought, “Very cool!” until I read this:

…there’s no uninstaller for the DNS utility, meaning once you’ve run it, your system will face “scrubbed” sites indefinitely. (I’m still working to extricate it from my PC; incredibly, the ScrubIT site offers no information on undoing the utility’s changes.) I’m hoping this rather startling oversight will be corrected soon, as it’s hard to recommend a service that won’t go away if you want it to.

So, I took it upon myself to investigate. I was surprised to see that the ScrubIT configuration utility was actually a compiles AutoIT script. After a bit of “playing” I was able to reverse engine the original script.

Essentially, all this configuration utility does is set the DNS settings on all of the network cards to their DNS settings; i.e. 67.138.54.100 and 207.225.209.66. In fact, it even uses the built in NETSH command to perform the DNS changes.

To remove the changes made by the configuration utility, all you need to do is the following:Open

1. Open up the Control Panel
2. Double click on Network Connections

Then for each network connection you see in this window, do the following:

1. Right click on the network connection and click on Properties in the context menu
2. Under, This connection uses the following items: click on Internet Protocol (TCP/IP)
3. Click on the Properties button. This will open a new window
4. At the bottom of the window, you will see a section selected that says Use the following DNS server addresses: and then it will have 67.138.54.100 and 207.225.209.66 in the list.
5. If you use DHCP, then select Obtain DNS server address automatically. If you do not use DNS, change 67.138.54.100 and 207.225.209.66 to your DNS addresses.
6. Close all windows.

That should do it for you.

Just one other bit of warning. If you use this configuration utility in a networking environment such as Windows Active Directory, this can break your system. You may experience either extremely long log-on times or lose the ability to log on to the domain at all. It is best to put these DNS settings into the router or firewall.

Update

I have completed the UnScrubIT configuration utility.  This is only to be used if you are running DHCP on your network.

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