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).

Python IPv6 Subnet Planner

IPv6 address planning can be a trial-and-error endeavor. There are useful tools for subnetting, but I couldn;t find anything that would just take a prefix, subnet length, and provide a simple list of the prefixes. (Now, this does exist, and I just simply missed it). I wrote some really simple python that does a few things: Accepts an IPv6 prefix and a new prefix length to generate subnet allocations.

IPB170 - RFC 7050 vs RFC 8781 for IPv6 Prefix Discovery

In this episode of the IPv6 Buzz, we dive into two RFCs for discovering IPv6 prefixes: RFC7050 and RFC8781. Why these two? First, 8781 is being proposed as preferential to 7050. Second, I happen to be a co-author on the draft that proposes the preference for 8781 and as usual, I have “insights” to share. We start with some background on RFC 7050, including the limitations that led to the development of RFC 8781.