Ask Slashdot: How To Deal With a DDoS Attack?
Take a look at this product, easier to use than most of the other options out there. All you need to do is change you DNS and your done.
State of WLAN Support on Linux?
Well if you thought Wifi support was bad for Linux, you should see the level of Wifi support in OSX... Basically its non existant, unless you buy the hardware from Mac, which I find quite amazing considering OSX is Darwin / BSD...
Yes there is this driver add on http://www.orangeware.com/endusers/wirelessformac. html however its $39 and it doesn't support much... I have 3 different USB Wireless dongles, and sadly none of them are supported!
My mini still has an ugly blue cable coming out its but, as I was so confident I didn't need to buy Apple's over priced wifi solution, hehe I had 3 different USB wireless dongles. BTW, all three of these dongles work great under Windows & Linux.