

How did you set up subnet advertisements on the router, and which subnets? Did you touch the ACL in the tailnet’s admin console?
On the home PC, did you accept advertised routes with the Tailscale client?
What happens when you ping a host on the LAN using tailscale ping ADDR
? What happens when you try to tracert
or tracepath
to it?
That’s unfortunate, I have no idea how Tailscale does routing on Windows. Try running the client without accepting any subnet advertisements.
I’ve also found this: https://tailscale.com/kb/1023/troubleshooting#lan-traffic-prioritization-with-overlapping-subnet-routes The solution might be to advertise a larger subnet (e.g. 192.168.1.0/23) to make the route advertisements on the tailnet less specific than on the LAN. Advertising a larger subnet won’t cause any additional issues because it’s in a private IP range.