IPB171 - IPv6 Basics - Routing

A subject after my own heart. Continuing the IPv6 Basics series with an episode on IPv6 routing essentials. We start with a comparison of various routing protocols: RIP, OSPF, IS-IS, EGP, and BGP. We look at pros and cons of each, and discuss challenges such as dual stack IPv4 and IPv6 network implementation, memory and resource use with IPv6, and link local addresses. Take a listen here:

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.