The U.S. Cybersecurity and Infrastructure Security Agency (CISA) announced the launch of a new guide aimed at reducing the threat posed by bulletproof hosting providers. Released on November 19, 2025, the guide – titled *Bulletproof Defense: Mitigating Risks from Bulletproof Hosting Providers* – was developed in partnership with U.S. and international partners through the Joint Ransomware Task Force. It offers internet service providers and network defenders a detailed overview of bulletproof hosting activity and outlines best‑practice steps to protect customers and networks. Recommendations include traffic analysis, maintaining a high‑confidence malicious resource list, automated reviews, customer notifications, and filter creation. CISA officials say the guide will help push cybercriminals toward legitimate infrastructure that cooperates with abuse complaints.
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https://www.cisa.gov/news-events/news/cisa-unveils-guide-combat-bulletproof-hosting-cybercrime
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