CISA Issues Guidance to Combat Bulletproof Hosting Abuse
🔒 CISA, together with US and international partners, has published a joint guide addressing bulletproof hosting (BPH) services that enable ransomware, phishing, malware delivery and other attacks. The guidance explains how BPH providers lease or resell infrastructure to criminals, enabling fast-flux operations, command-and-control activity and data extortion while evading takedowns. It recommends concrete defensive actions — including curating a high confidence list of malicious internet resources, continuous traffic analysis, automated blocklist reviews, network-edge filters, threat intelligence sharing and feedback processes — to help ISPs and network defenders reduce abuse while limiting collateral impact.
