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The deterministic IPv6 approach is fascinating. Have you run into any issues with ISP-provided IPv6 prefix delegation changing over time, or are you strictly us
by wsdn 3mo ago
The deterministic IPv6 approach is fascinating. Have you run into any issues with ISP-provided IPv6 prefix delegation changing over time, or are you strictly using ULAs (Unique Local Addresses) internally to bypass that headache?
- zrail 3mo agoHey thanks! That's my favorite recent addition. The host machines resolve a GUA from an ISP-provided prefix like normal. On top of that, I l33t'd my way to a fun ULA prefix. Each host's prefix, the stack network prefixes, and container addresses are deterministically derived from hashes of each component's name. As of today I haven't made any of the ULA stuff routable, although that was the original impetus for it. Clients see each host's GUA in DNS and generally route traffic through Caddy. Cross-host traffic is almost entirely through Tailscale. I run DNS refreshes at deploy time and hourly, but I haven't dealt with Comcast rotating my PD assignment yet. It's been stable for a couple years so I'm probably due.