DDoS Protection: Nginx, Cloudflare and System-Level Defenses

Security · 19.04.2026
DDoS Protection: Nginx, Cloudflare and System-Level Defenses 
# Nginx rate limiting
limit_conn_zone $binary_remote_addr zone=conn_limit:10m;
limit_req_zone $binary_remote_addr zone=req_limit:10m rate=50r/s;
# sysctl
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_syn_backlog = 2048
Hide your real server IP behind Cloudflare. The protection only works as long as attackers don't know your actual IP address.
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