Fear not. I made this a while back and it works on some/many firewalls:
FIREWALL-B-GONE:
In just these 4 easy steps, you can view pornography and other questionable materials through the schools firewall!
1. Visit the site:
http://babelfish.altavista.com/
2. On the page, a text box reads "Translate a Web page - Enter the Web address of the page you wish to translate". Inside the text box, enter the web adress:
http://www.megaproxy.com
A pulldown menu next to the box has a listing of language translation pairs. Select Chinese to English and click on the button translate.
OR
After typing the web adress, hit Tab, C, Tab, Space/Enter.
3. A website will appear with a banner across the top for AltaVista.com. In the lower half of the screen, there is a text box. Below the text box there is a button that says "CLICK HERE to switch to a secure 128bit SSL mode."
Click on "CLICK HERE"
4. In the text box, enter the desired site for surfing, and click on the button "SURF"
A new window will pop up with a legal statement, and a button. Book mark the site for easier return access.
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This does not work on net access limiting, only on filtering. Various other solutions exist; http://www.loopholesoftware.com has anti-filtering/monitering software for a price. You can probably find a registration key on Kazaa or a registered version. A website with information regarding firewalls, how they work, and why they suck is here, http://www.sethf.com/anticensorware/bess/loophole.php.
I spend a lot of time on a school network with Websense and most of the information is indispensible or useful at the very least. If you download the Google.com search toolbar it adds an option on your right click menu as "Translate Page" which avoids censorship but does not allow you to post or submit some forms of modification. It presents a read-only version of the page.
As for the web limiting, I'd have to know how the program works. The simplest solution is to explain to your dad how sometimes you leave the computer online overnight to finish downloading large files, and explain that the software isn't necessary and is counterproductive to normal net use.