IP-filter - It is a special file ipfilter.dat which contains IP-Ranges of anti-peer2peer organizations, corrupted data senders, hackers and resedved IP-Ranges. Which will be blocked. More info. IP-filter consists of: 1) Basic (Level 1) blocklist by Bluetack Internet Security Solutions. 2) Bogon list by CIDR Reports. 3) Fake servers list created and updated by me (part one, part two).