Author: Chirag

Local, remote, and dynamic forwarding. Use SSH as a poor-man’s VPN, expose internal services securely, and tunnel through firewalls.

Fast, simple, in the kernel. WireGuard replaced OpenVPN at most modern shops. How it works and how to set it up.

Tunneling, encryption, site-to-site vs remote access. The real reasons VPNs exist (beyond what consumer ads claim).

2.4 vs 5 vs 6 GHz, channel widths, why your Wi-Fi is slow at 8 PM. The physics behind your home network.

How Wi-Fi encryption works, why WEP is dead, what WPA3 actually fixes. The security shorthand on every router.

a, b, g, n, ac, ax, be — what each Wi-Fi generation delivers in speed, range, and frequency. The naming finally became human-readable in Wi-Fi 6.

Same word, opposite jobs. A forward proxy sits between clients and the internet. A reverse proxy sits in front of servers. Both are everywhere.

TCP-level vs HTTP-level load balancing. Algorithms, health checks, sticky sessions — and which type fits each use case.

Packet filters vs connection-aware. NGFW, WAF — what each firewall type does and where each fits.

Three devices that look similar but operate at different OSI layers. Big behavioral differences. The most important hardware vocabulary in networking.