Nginx Internals & Architecture
Comprehensive deep dive into Nginx internals — Master-Worker architecture, epoll/kqueue event loop, thread pools, connection lifecycle, upstream proxying, load balancing, SSL/TLS termination, HTTP/2, caching, rate limiting, and production tuning.
Proxies, Firewalls, NAT & VPNs
Deep dive into network middleboxes, forward and reverse proxies, Linux Netfilter hooks, conntrack state machine, WireGuard vs IPsec VPN encapsulation, and MSS clamping.
Reverse Proxy vs. Load Balancer vs. API Gateway
A comprehensive guide comparing reverse proxies, load balancers, and API gateways — their differences, internal mechanics, architectural roles, alternatives, and production deep dives for senior engineers.