Trying to get selfhosted LT working over tailscale

Really enjoying this service! Shoutout to proxmox helper scripts for an easy install.

my server works well on lan:

http://192.168.abc.abc:8081/v2

but it is unreachable over tailscale:
curl http://100.abc.abc.abc:8081/v2/languages

ExecStart=java -cp languagetool-server.jar org.languagetool.server.HTTPServer --config server.properties --public --allow-origin “*”

has anyone gotten this working over tailscale? maybe I need a firewall rule created in tailscale…