networking

A networking enthusiast documents the process of hacking an old AT&T 3G femtocell to broadcast UMTS using JTAG, soldering, and open-source Osmocom tools.

httptap is a Python CLI that dissects HTTP requests into phases like DNS, TCP, TLS, and data transfer to generate detailed waterfall timelines for troubleshooting and performance analysis.

Andree Toonk releases Wireblast, a 100 Gbps packet generator written in Go using AF_XDP for line-rate packet transmission.

This article explains Discovery of Designated Resolvers (DDR), a protocol that lets devices automatically discover encrypted DNS endpoints. It describes how the query works, how resolvers respond, and the limitations of opportunistic upgrades from plain DNS.

A practical guide to selecting MikroTik switches (CRS504, CRS804, CRS812) for building DGX Spark clusters, including pricing and real user examples of 8x DGX Spark setups.

WireGuard is being ported to the Plan 9 operating system, bringing modern VPN capabilities to the niche OS.

A guide on distinguishing whether latency in voice agents stems from the model or the network, helping developers identify bottlenecks.

A blog post from ArcBox Labs describes a half-bridge offloading technique to overcome UniFi gateway PPPoE performance bottlenecks, especially on high-speed connections like their 5 Gbps office line.

A user is setting up a 16-node DGX Spark cluster to run frontier open models locally, discussing networking tradeoffs between 200 and 100 Gbit/s.

Jeff Geerling details how to get 25 Gbps Ethernet on a Mac Studio using a budget Thunderbolt 3 to OCP 2 NIC adapter, including performance tests and fixes for overheating issues.

A deep dive into the design philosophy behind Netstack3, Fuchsia's Rust-based networking stack, which achieved remarkably low bug counts during dogfooding and is now in production on millions of devices with 20x fewer crashes than its predecessor.

Tailscale on jailbroken Kindles has been updated with proxy and TUN modes, allowing apps like KOReader to reach other Tailscale devices, and enabling Tailscale SSH by default.

The article recounts the historical impact of the BSD 4.2 sockets interface released in 1983, which standardized network access and paved the way for modern online services.

Hulios is an eBPF-powered transparent Tor VPN gateway for Linux that secures outbound traffic by redirecting TCP and DNS through an embedded Arti Tor client and Hickory-based DNS resolver, with kernel-level leak protection.

A step-by-step guide to setting up a self-hosted web server on OpenBSD using httpd and WireGuard to tunnel through a VPS for IP hiding.

A blog post by Georg Lukas detailing how to set up an authoritative dnsmasq container on a MikroTik RouterOS device for dual use as authoritative DNS and forwarding cache, with considerations for flash storage and container configuration.

A guide to self-hosting servers at home using L2TP tunnels and static IPs, bypassing ISP restrictions like CGNAT.

A task-centered guide to iproute2, the Linux networking toolkit, covering ip, bridge, and ss commands with practical usage examples.

BPF programs can now send network packets directly from kernel space using the netpoll infrastructure, removing the need for a user-space agent and improving resilience for security monitoring tools like Tetragon.

Shruti Mishra shares how she uses Viktor, an AI employee in Slack, to automate event selection and networking in Asia, saving time and improving decisions.