Why blocking ads became important
Not because ads are more frequent or annoying, but because Ad Servers became a target. Infecting an Ad Server is way more efficient than targeting just one website. One Ad Server can serve dozens – sometime hundreds – of websites at a time.
Another reason why this is becoming more popular is that these attacks can’t be blocked in a firewall. The attacks use port 80, which you need to access the WWW. If you block port 80, your computer becomes largely useless. Infected Ad Servers became an important way to distribute malware, worms and viruses.
All of this happened on quite a few occasions already, and the resulting infections spread quickly and world wide. One of the more ‘famous’ hacks involved servers used by Yahoo, Fox and Google. One of the most popular ad blockers is Adblock Plus. Installation is a breeze. If you still use IE (…) go here.