TCP/SSL passthrough with traefik 2.0 and file provider

traefik.toml

[Global]
  Debug = true
  CheckNewVersion = false
  SendAnonymousUsage = false

[entrypoints]

  [entrypoints.https]
     address = ":443"

[API]
  Dashboard = true
  [API.Statistics]
    RecentErrors = 42

[providers.file]
[http]

  [tcp.routers]
     [tcp.routers.Router-1]
       entryPoints = ["https"]
       rule = "HostSNI(`*`)"
       service = "my-service"
      [tcp.routers.Router-1.tls]
       passthrough=true

  [tcp.services]
     [tcp.services.my-service.LoadBalancer]
       [[tcp.services.my-service.LoadBalancer.servers]]
        address = "xxx:31443"
       [[tcp.services.my-service.LoadBalancer.servers]]
        address = "xxx:31443"
       [[tcp.services.my-service.LoadBalancer.servers]]
        address = "xxx:31443"