Update on recent VoIP attacks: What should I do if I’m attacked?
Oct 7, 2021Omer Yoachimik, Vivek Ganti, Alex Forster
Summary
This post details common attack patterns against VoIP infrastructure, including TCP floods targeting stateful firewalls, UDP floods and reflection targeting SIP infrastructure, and SIP protocol-specific application layer attacks. It recommends proactive deployment of always-on DDoS mitigation services like Cloudflare Magic Transit, enforcement of positive security models, custom mitigation strategy development with vendors, and employee education on ransom demands. It highlights Cloudflare's capacity and existing mitigations for these attacks.
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