tailscale: ssh X11 forwarding doesn't work

Unfortunately this still doesn’t work. I’ve tried with Win10 Enterprise and the X410 X server trying to connect to ubuntu 22.04 / tailscale 1.46. No DISPLAY variable is passed through to the tailnode.

Just discovered a trick and it works for me with this workaround!

# ~/.ssh/config

# assuming you have something like this
Host *
  # if not make sure to add these lines to others below too
  ForwardAgent yes
  ForwardX11 yes

# method 1 - a typical direct enough way to connect - doesn't require sshd service running at all (assuming tailscale is servicing SSH for that machine)
Host alias
  # connecting SSH via tailscale, X11 forwarding would not work
  Hostname name-on-tailscale
  # thanks to tailscale, no need to type user's password nor saving public key on the remote machine
  User your-user # @name-on-tailscale

# method 2 - this requires a separate sshd service running (nothing to do with tailscale) as well as the running tailscale servicing SSH
Host alias-via-self
  # Hostname localhost # this would work but mess with `~/.ssh/known_hosts`
  # but pretty much same as above
  # Hostname [other.ip.or.domain-name.other.than.localhost.but.pointing.to.same.machine]
  Hostname name-on-tailscale.ts.127.0.0.1.nip.io # this resolves to 127.0.0.1 and "namespacing" according to your naming to avoid messing up with `~/.ssh/knwon_hosts`
  # visit https://nip.io/ to learn more, if you are not familiar with it

  # you might have to enter password unless
  # your public key is saved at the remote machine's `~/.ssh/authorized_keys`
  User your-user
  ProxyJump alias # this is the essence of the trick
  # you might do below instead if you don't need `alias` at all
  # ProxyJump your-user@name-on-tailscale

# connect with the method 2
$ ssh alias-via-self
# You are now being served by the "typical" sshd (probably via openssh's)
# while tailscale is proxying (being a bastion host)

$ printenv DISPLAY
localhost:11.0 # voila!

# perhaps try this too if you want to verify even further
$ which xeyes && xeyes

Also getting the X11 forwarding request failed on channel 0 error on MacM1 to Ubuntu