Reading up on networking

This piece explains SSH local and remote port forwarding with practical examples and a visual cheat sheet for accessing private network services.

Iroh 1.0 is a library enabling apps to establish direct peer-to-peer connections via relays, removing dependency on external VPN accounts or infrastructure.

The author argues that for internal IT infrastructure, DNS adds complexity and risk, and suggests replacing it with tools like Ansible and /etc/hosts for greater reliability and security.

Closing a TCP socket with `shutdown(RD_WR)` or `close()` can cause `ECONNRESET` errors for the peer because data still in flight may be discarded before the receiver finishes reading.

IPv6 stopped working on the author's home network because AdGuard Home's DNS settings had an option checked that disabled all IPv6 DNS queries.

Solo consultants overwhelmingly land their first projects through former colleagues and professional network referrals, not cold outreach or content marketing.

Tailscale's Peer Relays feature is now generally available, enabling any node in a tailnet to act as a relay to improve performance and reduce reliance on centralized DERP servers.

Cloudflare's reordering of CNAME records in DNS responses broke glibc and other clients due to widespread reliance on undocumented ordering.

An interactive guide explains browser mechanics from URL parsing to TCP connections and HTTP requests, aiming to build intuitive understanding.

Tailscale offers a zero-trust identity-based connectivity platform that replaces legacy VPNs for remote teams, multi-cloud, IoT, and AI workloads.

TCP ensures reliable data delivery over unreliable IP by managing packet loss, congestion, and ordering, forming the backbone of HTTP, email, and SSH.