Greetings! I run a bunch of sites on nginx-plus-r19 (OpenSSL 1.0.2k-fips) and was recently hit by a nasty DDoS SSL handshake attack. I noticed nginx worker processes suddenly eating all available CPU and the "Handshakes failed" counter in the nginx plus dashboard suddenly climbing out of proportion to the successful handshakes. If I understand correctly, the limit_req directiveby mogwai - Nginx Mailing List - English