new Tailscale issue?

[biggreydog]

I updated OPNsense to 25.1.7-4 yesterday.  I was also going to convert to dnsmasq from ISC DHCP and made this adjustment this morning... small office, only turned off one and turned on the other.  After, I was unable to connect to my router/network with Tailscale.  I restarted Tailscale and also made sure I did not need to login/authenticate for Tailscale again..  I also reverted back to a previous router config and rebooted.  Still did not help.  Tailscale on router stays Netcheck is up.  Tailscale IPs on the router says null. 

Not sure where to go from here.  If it was a setting change I created, I would think that reverting to a previous state would resolve the issue.

[muchacha_grande]

Hi, I found the same thing on a test OPNSense.
I recently updated the test box and observed the same issue.
I didn't give it much attention until now that you mentioned it here.
I'm using a non reusable preauth key and the status says "Backend: NeedsLogin, Tailscale IPs: null"
It was working during the beta tests phase on January, with this same key.
I'm using Headscale as the coordination server.

[biggreydog]

I looked at everything and didn't see what could have changed to cause that issue other than my small change to my DHCP/DNS settings.

I ended up deleting and reinstalling, Tailscale, didn't work.

I deleted router from the Tailscale machine list and re-added, didn't work

Finally I deleted the pre-auth key in OPNsense and created a new one on the Tailscale website and that finally worked.

Hope this helps others.

[muchacha_grande]

Well, thank you. It helped me.
I created a new preauth key and expired the previous one.
Now, for some reason, it works with the new key.