Thanks for replying.
I understand OpenDNS is a service that replaces your ISPs DNS servers with theirs. I understand how they block phishing - they simply remove known phishing IP addresses from their servers. But how do they block botnets? Can they stop a command and control IRC server from connecting to your computer? Or do they just block sites with known exploits to prevent your computer being infected by a backdoor that will make it part of a botnet? I'd appreciate it if anyone could clarify.
Edited by stillwaters, 13 December 2009 - 06:54 AM.