Tag

Networking

Linux Sep 09, 2024 3 min read

When sysctl took down my subnet

A rough edge case in Linux kernel configuration ended up taking my public /24 subnet offline regularly. Read this post to find out why.

Networking Feb 16, 2023 2 min read

Choosing your own MAC Address

A MAC address is burned into a device by the manufacturer, and manufacturers are allocated vendor IDs (the first 3 bytes of a MAC address). One of these is Microsoft Hyper-V, which owns all of the 00:15:5D:XX:XX:XX addresses. This led to an interesting problem...

Networking Feb 26, 2019 3 min read

Making Sense of WireGuard

I recently decided to try out the hot new VPN protocol on the block, WireGuard. It took me about 2 hours of debugging and diagnostics to make sense of things, so I'm logging my notes here for future reference.

Containers Aug 07, 2018 1 min read

Building Docker containers behind a proxy

How do you configure Docker to use a proxy when building a container, but not when running it?

Networking Apr 27, 2018 8 min read

A Ubiquiti Home Network

For a while, I've been eyeing an upgrade of my home network. I recently did that by introducing Ubiquiti gear, and (spoiler alert) it's been great.

Cloud Mar 04, 2018 3 min read

Kubernetes: Getting Pods to talk to the Internet, not systemd

Systemd plays havoc with Kubernetes defaults and kills DNS. Here's how to fix that.

Linux Jan 07, 2018 1 min read

mDNS Name Resolution in Linux

Bonjour is really useful on Windows and macOS. It turns out that you can also use it on Linux!

macOS May 06, 2017 3 min read

Thunderbolt Networking

Thunderbolt is amazingly fast, but how do you find the host at the other end of the cable?

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