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Nginx vs Apache vs Caddy Reverse-Proxy & TLS Hardening Config Generator (2026)

Generate production-hardened reverse-proxy configurations side-by-side for Nginx, Apache (`httpd`), and Caddy 2: configure TLS 1.3 / HTTP/3 QUIC, WebSocket upgrades, IP rate limiting, HSTS/CSP security headers, and compare C10K event-loop vs worker memory footprints.Documentation & FAQs ↓

Nginx vs Apache vs Caddy Reverse-Proxy & TLS Hardening Config Generator — Interactive Console
Runs locally in your browser • Instant output
limit_req_zone $binary_remote_addr zone= edge_limit:10m rate=20r/s;

server {
    listen 443 ssl http2;
    listen 443 quic reuseport;
    add_header Alt-Svc 'h3=":443"; ma=86400' always;
    server_name app.example.com;
    server_tokens off;
    ssl_protocols TLSv1.2 TLSv1.3;
    add_header Strict-Transport-Security "max-age=63072000; includeSubDomains; preload" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header X-Frame-Options "SAMEORIGIN" always;
    gzip on;
    gzip_types text/plain text/css application/json application/javascript;

    location ~ /\.(?!well-known) {
        deny all;
        return 404;
    }
    location / {
        limit_req zone=edge_limit burst=40 nodelay;
        proxy_pass http://127.0.0.1:3000;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
    }
}
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2026 Nginx vs Apache vs Caddy v2 Reverse Proxy & Security Directive Table

2026 Verified Reference
Quick Answer & 2026 Technical Summary (nginx reverse proxy config generator)Updated 2026 Standard

When deploying production web servers in 2026, enforce TLS 1.3 with HTTP/3 (QUIC `UDP/443`), configure WebSocket upgrade headers for reverse proxies, enable Brotli/Zstd compression, and set `Strict-Transport-Security`, `X-Content-Type-Options: nosniff`, and `Content-Security-Policy` headers at the edge.

nginx -t && systemctl reload nginx | apachectl configtest | caddy validate --config /etc/caddy/Caddyfile
Worker Connections: worker_processes auto; worker_connections 4096;
TLS 1.3 0-RTT / HTTP3: listen 443 quic reuseport; add_header Alt-Svc 'h3=":443"'
HSTS Preload Header: max-age=63072000; includeSubDomains; preload
Server CapabilityNginx (nginx.conf)Apache (httpd.conf / .htaccess)Caddy v2 (Caddyfile)
Reverse Proxy + WebSocketsproxy_pass http://127.0.0.1:3000; proxy_set_header Upgrade $http_upgrade;ProxyPass / http://127.0.0.1:3000/ upgrade=websocketreverse_proxy 127.0.0.1:3000 (Auto WebSockets)
TLS 1.3 + HTTP/3 QUIClisten 443 ssl; listen 443 quic; ssl_protocols TLSv1.2 TLSv1.3;Protocols h2 http/1.1 | SSLProtocol -all +TLSv1.3Automatic HTTPS + HTTP/3 enabled by default
SPA React/Next Static Fallbacktry_files $uri $uri/ /index.html;FallbackResource /index.htmltry_files {path} /index.html
HSTS & Hardening Headersadd_header Strict-Transport-Security "max-age=63072000" always;Header always set Strict-Transport-Security "max-age=63072000"header Strict-Transport-Security "max-age=63072000"
Per-IP Rate Limiting (DDoS)limit_req_zone $binary_remote_addr zone=api:10m rate=15r/s;mod_ratelimit / mod_evasive DOSPageCount 15rate_limit { zone dynamic { key {remote_host} events 15 window 1s } }
Immutable Static Asset Cachelocation ~* \.(js|css|woff2|avif)$ { expires 365d; add_header Cache-Control "public, immutable"; }ExpiresByType text/css "access plus 1 year"@static path *.js *.css *.woff2 *.avif; header @static Cache-Control "public, max-age=31536000, immutable"
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Step-by-Step Workflow

4 Easy Steps
01Phase 1

Enter Domain Name, Upstream Backend Target & Architecture Preset

Set your public domain (e.g., `app.example.com`) and upstream origin (`http://127.0.0.1:3000`), or pick a preset (Next.js/Node SSR, WebSocket Realtime API, Static + API Gateway).

02Phase 2

Toggle TLS 1.3, HTTP/3 QUIC, Rate Limiting & OWASP Security Headers

Enable or disable HTTP/3 (`h3`), WebSockets, IP Rate Limiting, HSTS Preload, `X-Frame-Options`, `X-Content-Type-Options`, `server_tokens off`, and Brotli/Gzip.

03Phase 3

Switch Between Generated Nginx, Apache & Caddyfile Configs

Inspect and copy the complete configuration file for Nginx, Apache (`mod_proxy` + `mod_ssl` + `mod_headers`), or Caddy 2.

04Phase 4

Simulate Concurrent Connections in the C10K Memory Benchmark

Adjust the concurrent connection slider (100 to 25,000 clients) to compare worker RAM overhead and latency behavior across all three web server architectures.

Real-World Applications

Deploying Node.js, Next.js, Go, or Python Apps Behind a Reverse Proxy

Generate a zero-vulnerability reverse proxy config with `X-Forwarded-For`, `X-Real-IP`, `X-Forwarded-Proto`, and WebSocket pass-through in seconds.

Migrating Complex Nginx/Apache Configs to Caddy 2 (or Vice Versa)

Compare how 65 lines of Nginx TLS, HSTS, and proxy boilerplate map to 18 lines of Caddyfile with automatic ACME Let's Encrypt/ZeroSSL certificate management.

Sizing VPS RAM for High-Concurrency Traffic Spikes

See why Apache `mpm_prefork` exhausts a 2 GB VPS at ~400 concurrent connections while Nginx `epoll` handles 10,000+ connections in under 60 MB of RAM.

Related Editorial GuideWhat is a Web Server and How Does It Work
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