What are some free or inexpensive places where I can grab blacklists automatically? I do not want to have to query for each individual IP. The firewall, PF, requires you to have the IPs or ranges in a file line by line.
Any type of blacklist applies -- but I am more worried about malicious content, such as botnets, compromised hosts, and phishing IPs.
I have tried to research this through Google, but a lot of resources are for how to remove yourself from a blacklist, and many providers are on a query basis only. I understand that most providers do not want to give away their entire database of IPs, but maybe there is a free list established by a consortium that I do not know of.