Posts tagged "networking"

• Mar 17, 2026

  When systemd-resolved Picks the Wrong DNS Server

  systemd-resolved treats all configured DNS servers as equivalent. Here's why that breaks private DNS resources in VMs and how I worked around it.

• Feb 19, 2026

  Writing a BPF packet filter on macOS in Go

  How to use Berkeley Packet Filter on macOS to filter raw packets in the kernel, reducing 10,000 frames to 100 with six BPF instructions and golang.org/x/net/bpf.

• Feb 16, 2026

  Solving Keycloak Internal vs External Access in Kubernetes with hostname-backchannel-dynamic

• Jan 30, 2026

  Building a Simple DNS Forwarder for VMs in Go

• Nov 29, 2025

  Network Namespaces: Isolating VM Networking

• Feb 24, 2025

  Setting Up VM Networking on Linux: Bridges, TAPs, and More

• Jun 18, 2024

  QEMU networking on macOS

• May 11, 2023

  Simplify networking with socat