Layer 4 DDoS
Defend Linux servers from volumetric TCP SYN Floods that exhaust kernel connection backlogs using SYN cookies and hashlimit rate-limiting.
Production-Ready
DDoS Mitigation & Security Recipes
Battle-tested firewall scripts, reverse-proxy rate-limiting rules, and web server hardening baselines. Copy-paste configurations for Nginx, iptables, Cloudflare WAF, and Linux kernels.
SYN Flood Defense
HTTP Slowloris Defense
Layer 7 Defense
DNS & Defense
Linux sysctl.conf Defense
Cloudflare WAF Defense
WordPress XML-RPC Defense
Content Security Defense
Strict-Transport-Security (HSTS) Defense
Strict CORS Defense
Production SSH Defense
Nginx Modern Defense
Production UFW Defense
Log4Shell (CVE-2021-44228) Defense
Spring4Shell (CVE-2022-22965) Defense
Clickjacking Defense Defense
⚡ Interactive DDoS Rate-Limit & Threshold Calculator
Calculate recommended Nginx limit_req or iptables hashlimit parameters based on normal baseline traffic.
Verified Security Hardening Recipes
Hardened configurations for Layer 4, Layer 7, Linux Kernels, and Web Headers.
Layer 7 DDoS
Protect Nginx web servers from Slowloris and Slow HTTP POST attacks that tie up worker connections using ultra-slow byte transmissions.
Layer 7 DDoS
Stop Challenge Collapsar (CC) and bot floods targeting expensive search endpoints or login APIs using Nginx leaky-bucket rate limiting.
Layer 4 DDoS
Mitigate massive reflection attacks (NTP, DNS, Memcached) that saturate network interfaces with unsolicited large UDP reply payloads.
System Hardening
Optimize the Linux TCP/IP stack against socket exhaustion, TIME_WAIT overload, and buffer starvation during high packet-per-second floods.
Cloudflare WAF Custom Rules to Block Scrapers & L7 Botnets
Edge ProtectionLayer 7 DDoS
Construct edge firewall expressions to block automated headless browsers, AI scrapers, and malicious botnet clusters before they touch origin servers.
WordPress XML-RPC Pingback DDoS Mitigation (Nginx & Apache)
High FrequencyLayer 7 DDoS
Block weaponized xmlrpc.php pingback amplifications that turn thousands of remote WordPress blogs into a distributed reflection botnet.
Content Security Policy (CSP) for Next.js & Stripe Elements
PCI-DSS EssentialWeb Hardening
Strict Content-Security-Policy (CSP) header implementation that satisfies PCI-DSS SAQ A requirements while allowing Stripe.js payment elements.
Web Hardening
Prevent SSL Stripping and downgrade attacks by forcing browsers to connect via HTTPS exclusively with Chrome HSTS Preload eligibility.
Web Hardening
Implement watertight Cross-Origin Resource Sharing (CORS) with origin whitelisting and credentials support for serverless APIs.
System Hardening
Lock down Linux server remote access against automated brute-force password scans using Ed25519 public keys, custom port, and Fail2ban.
System Hardening
Achieve an SSL Labs A+ rating by configuring modern TLS 1.2/1.3 ciphers, OCSP stapling, and disabling insecure SSLv3/TLS 1.0/1.1 protocols.
System Hardening
Default-deny firewall baseline using Uncomplicated Firewall (UFW) to isolate internal database ports from public internet scanning.
CVE Mitigation
Emergency WAF regex filtering patterns and JVM flags to neutralize JNDI LDAP remote code execution exploits in Java applications.
CVE Mitigation
Neutralize Spring Framework remote code execution exploits targeting Tomcat access logs with Nginx parameter inspection rules.
Web Hardening
Prevent UI redressing and hidden iframe clickjacking attacks across legacy and modern browsers using dual defense headers.