Tailscale DNS Updater

One of the very few things that irritates me about TailScale is that it uses ULA addressing and doesn’t allow for custom address block definitions (i.e., I can’t use my own GUA block). While this is definitely a “me problem”, it is something that is irksome to me nonetheless. So, in order to get access to my systems over TailScale, over IPv6, I created this python script to grab the v6 addresses and put them into a format conducive to, say, an internal BIND view, or pihole (v5).

Building a host telemetry solution using Tailscale

An often overlooked dimension of data collection is flow data from hosts. This is not a new concept, there have been tools built for this for a very long time, but in many cases, and especially over the last 8-10 years, many system engineers have gravitated toward tooling like grafana and prometheus. While these are fine tools and if done well provide an excellent view of host health, they aren’t really a full picture of host behavior.