The DShield Blocklist
By Daniel Miessler on December 15th, 2008: Tagged as Information Security

The DShield blocklist is an invaluable resource for any information security shop. I’m sure most of you in infosec are already aware of it, but just in case…
DShield maintains a “block” list of networks that have exhibited suspicious activity and that that you might consider blocking.
It even includes a script that can automatically update iptables with the updated blacklist.