DDoS protection on Lion Server Firewall

LSF is host L3/L4 protection, not network scrubbing and not a replacement for Cloudflare.

Defaults: SYN 10/s burst 20; 40 concurrent connections per IP on 80/443 and 10 on SSH; port-flood caps on 22/80/443; UDP/ICMP caps; Apply sysctl for syncookies and rp_filter.

If a legitimate crawler or remote backup is clipped, raise CONNLIMIT / PORTFLOOD / SYNFLOOD_RATE and Restart, or Allow the IP.

DDoS L3/L4

  • lsf, ddos
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