i like that it removes tailscale proprietary.
if that is goal then why not go 100% open source to eliminate the ts derp control as well and get full sovereignty?
like netbird, openziti, zerotier, etc.
Or just use wireguard directly. I get it that it's a pain in the ass to configure it, but there are plenty of open source config generators
(Author here)
The DERP server is already open source and tailcat can use any DERP server you run: https://github.com/tailscale/tailscale/tree/main/cmd/derper#...
We just provide some default ones (https://tailcat.dev/derpmap.json) to get started if you're not bandwidth-sensitive. But you don't have to use them.
Update: I added more explicit docs about this to https://github.com/tailscale/tailcat#bring-your-own-derp-rel...