Disabling Worms Moore et al. show that containing worms is not practical on an Internet scale unless a large fraction of the Internet cooperates. Active Immunization: Deplay a large number of honeypots to detect infected hosts. Immunize all infected hosts that contact a honeypot. Model using SIR epidemic model. 360,000 susceptiple machines in 32-bit address space. 150 initially infected machines. Worms launch 50 probes per second.