ISP cripples zombie PC network

Zombie PCs are no laughing matter. If left unchecked they can cause all kinds of problems for networks and system administrators.
Telenor used some ingenious techniques involving IRC to track down and eliminate an entire network of zombies and the botnet they were connected to.
[b]While Telenor was able to shut down the illicit network, they were not able to get all the way to the source. This means the botnet could already be reestablished. How do we protect ourselves from such a sophisticated attack?[/b]