Close connection if no router match

Hello traefik community,
I'm looking for a way to indicate traefik to close connection if no router matches for an entrypoint.

My current configuration is an entrypoint that have a TCP router with a rule like HostSNI(`foobar.example.org`).
TCP traffic works correctly, but it seems that when I curl the entrypoint port using curl with http or https, I got a "404 route not found".

Having a HTTP or HTTPS response on this port is a problem for me.
Is there a way to indicate to traefik that if no router matches, then it should close the connection, so no valid HTTP/HTTPS is returned ?

Thanks,
Romain