Pinggy Blog

Recently updated posts

The latest revisions across our writing on tunnels, networking, self-hosting, self-hosted LLMs, and AI - freshest updates first.


How IPv6 Solves the NAT Problem

IPv6 NAT Networking

Discover how IPv6's massive address space eliminates the need for NAT, restoring true end-to-end connectivity. Learn the technical differences between IPv4 and IPv6, why NAT was necessary, and how IPv6 enables direct peer-to-peer communication for gaming, VoIP, IoT, and more.

How does NAT traversal work?

Networking NAT Peer-to-Peer

Learn how NAT traversal enables peer-to-peer connectivity through firewalls and routers. Understand STUN, TURN, ICE protocols, hole punching techniques, and practical implementation strategies.

How Cloudflare Incident Affected 2.4 Billion Internet Users

Cloudflare Outage Incident

Deep dive into the November 18, 2025 Cloudflare outage that disrupted 2.4 billion users across ChatGPT, X, Spotify, Canva, and more. Technical breakdown of the Bot Management bug, financial impact analysis, and lessons learned from one of the internet's worst outages since 2019.

How to Fix NET::ERR_CERT_AUTHORITY_INVALID Error

SSL Errors Security Networking

Learn about the NET::ERR_CERT_AUTHORITY_INVALID error, its causes, and effective solutions. Troubleshooting steps for Chrome, Safari, and Arc browsers.

How to Host Your AI App on Google Colab for Free

Google Colab Ollama Pinggy

Learn how to build and host a complete AI-powered Flask application on Google Colab with free GPU access. Use Ollama for LLM inference and Pinggy for public access - no server costs required.