Transmission peer listening port

I have a transmission container set up and the web gui available at transmission.example.com.
That's working fine.

|traefik.backend|transmission|
|traefik.docker.network|traefik_proxy|
|traefik.enable|true|
|traefik.frontend.headers.SSLHost|example.com|
|traefik.frontend.headers.SSLRedirect|true|
|traefik.frontend.headers.STSIncludeSubdomains|true|
|traefik.frontend.headers.STSPreload|true|
|traefik.frontend.headers.STSSeconds|315360000|
|traefik.frontend.headers.browserXSSFilter|true|
|traefik.frontend.headers.contentTypeNosniff|true|
|traefik.frontend.headers.forceSTSHeader|true|
|traefik.frontend.headers.frameDeny|true|
|traefik.frontend.rule|Host:transmission.example.com|
|traefik.port|9091|
|traefik.protocol|http|

What about the peer listening port (default is 51413/tcp)? Currently it's exposed to the host machine in docker and the internet with port forwarding on the router.
Since I want to open as little ports as possible I'm wondering if it's possible to achieve this with traefik v1.7.