NGINX Link Function Module: Embed C/C++ in NGINX
by Danila Vershinin, February 9, 2026
Learn how to use the NGINX link function module to embed custom C/C++ application logic directly into NGINX. Build high-performance APIs, authentication handlers, and dynamic content generators without a separate application server.
Read More...NGINX Keyval Module: Dynamic Key-Value Store Inside NGINX
by Danila Vershinin,
Learn how to use the NGINX keyval module to create a dynamic key-value store directly inside NGINX. Build feature flags, IP blocklists, maintenance mode toggles, A/B testing, and canary deployments — all without restarting NGINX or adding backend services.
Read More...NGINX max_headers: Prevent Header-Flooding DoS
by Danila Vershinin, February 8, 2026
Learn how to use the max_headers directive in nginx-mod to limit the number of HTTP request headers and protect your server from header-flooding DoS attacks. Includes installation, configuration, and testing on RHEL-based systems.
Read More...fds FirewallD Made Easy: Trusted Lists
by Danila Vershinin,
Managing a Linux firewall shouldn’t require memorizing pages of firewall-cmd syntax. Yet that’s exactly what FirewallD demands for everyday tasks like blocking an abusive IP or whitelisting PayPal webhooks. Enter fds and trusted-lists — two tools from the GetPageSpeed repository that transform fds FirewallD management from painful to pleasant. Together, they give you: fds: Block […]
Read More...NGINX Digest Authentication: More Secure Than Basic Auth
by Danila Vershinin, February 7, 2026
Learn how to configure NGINX digest authentication using the ngx_http_auth_digest module. This guide covers installation, htdigest password files, brute-force protection, shared memory tuning, and when to choose digest auth over basic auth for securing your NGINX locations.
Read More...NGINX Redis2 Module: Talk to Redis Directly from NGINX
by Danila Vershinin,
Learn how to use the NGINX redis2 module to communicate with Redis directly from NGINX. This module implements the Redis 2.0 protocol with support for pipelining, keepalive connections, and all Redis commands. Install it easily on CentOS, RHEL, Rocky Linux, Debian, and Ubuntu via GetPageSpeed repository.
Read More...NGINX Sysguard: Automatic Protection Against Server Overload
by Danila Vershinin,
Learn how to protect your NGINX server from overload using the sysguard module. Configure load-based request rejection, memory protection, and response time monitoring for graceful degradation under pressure.
Read More...NGINX http3 http_host Is Empty — Here’s the Fix
by Danila Vershinin, February 6, 2026
NGINX HTTP/3 leaves $http_host empty, breaking FastCGI, proxy configs, and logs. nginx-mod fixed this at the protocol layer — four months before upstream shipped a partial workaround.
Read More...NGINX Cookie Flag Module: Set HttpOnly, Secure, and SameSite
by Danila Vershinin,
Learn how to enforce HttpOnly, Secure, and SameSite cookie flags in NGINX using the cookie flag module. Step-by-step installation, configuration examples, and security best practices for protecting session cookies at the reverse proxy layer.
Read More...NGINX JavaScript Challenge: Stop Bots Without CAPTCHAs
by Danila Vershinin,
Learn how to protect your NGINX server from bots and DDoS attacks using the JavaScript challenge module. This lightweight proof-of-work solution filters automated traffic without CAPTCHAs, preserving user experience while blocking scripts that cannot execute JavaScript.
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