The ForwardingPlane - A wealth of rambling run-on sentences, misspellings, rants, and technical babble.
Oct. 13, 2025
Many resources exist in order to test and report on IPv6 availability. One such site - test-ipv6.com - has been a staple for nearly 15 years. This site has a robust mirror network and has been proudly advertising free since its inception. However, running such resources can be costly in both time and money. Recently, the author and maintainer of the site had announce its retirement. This sent some shockwaves through the IPv6 community that eventually culminated in a realization that we rely on something that isn’t necessarily funded or permanent.
Oct. 9, 2025
Sometimes weirdness occurs within DNS if you’re on an IPv4 network and you connect to a dual-stack or v6-only VPN. Maybe the browser doesn’t connect, but you can still send pings, or vice versa. Is the OS getting confused about which stack and which order of interfaces to request services? Is the weird behavior being caused by Happy Eyeballs? Is it something else? These occurrances can be infuriating and very difficult to troubleshot.
Sep. 25, 2025
We’re diving into another IPv6 Basics today with the topic of dual-stack, which means running the IPv4 and IPv6 protocol stacks simultaneously. We get many questions about the implications of running dual-stack, and in this episode we’ll provide answers. We start by getting a little finicky about the definition of dual-stack, and then talk about when you should be using it, the impacts dual-stack may have on your network design, and how to think about dual-stack as a transition to an all (or mostly) IPv6 environment.