tailscaled binds to port 53, causing unbound to fail to start

mfld

Why is this a thing:

sockstat -l | grep 53
root     tailscaled 67328 20  udp46  *:35330               *:*
root     tailscaled 67328 27  udp46  *:53                  *:*

it is causing DNS outages

php-fpm 63443 - - /system.php: The command '/usr/local/sbin/unbound -c /var/unbound/unbound.conf' returned exit code '1', the output was '[1721265423] unbound[43366:0] error: bind: address already in use [1721265423] unbound[43366:0] fatal error: could not open ports'

I only see it on some 24.03 devices with this style of config. Others work fine.

johnpoz

@mfld my guess would be you have magicdns enabled

https://tailscale.com/kb/1081/magicdns

I think they changed that to be default enabled a while back, use to be off by default. So depending on when you created your tailscale account?

I do not have enabled.. Makes no sense when you run your own dns.