In addition to setting ACLs, you can start the tailscale client in "shields up" mode, where it adds a local rule preventing connections from other nodes to your

In addition to setting ACLs, you can start the tailscale client in "shields up" mode, where it adds a local rule preventing connections from other nodes to yours. Of course that's not perfect (there are ways to avoid it that if blocked would in turn break legitimate uses by you) but it's there.