Ngrok, running multiple ports at once (works for free version)

ngrok.yml

# Create 4 tunnels, each for different ports, with only https enabled
# This way the ngrok process stays bellow the Free plan limit (4 tunnels)
# command: ngrok start --all # to start all of them
# command: ngrok start note tb # to run jupyter notebook server and tensorboard server only
# refer to this page for more info: https://ngrok.com/docs#multiple-tunnels

authtoken: ...
log: ngrok.log
tunnels:
  # to run jupyter notebook server
  note:
    addr: 7111
    proto: http
    bind_tls: true
  # to run visdom server
  visdom:
    addr: 8097
    proto: http
    bind_tls: true
  # to run tensorboard server
  tb:
    addr: 6006
    proto: http
    bind_tls: true
  # just an extra port available for any usage
  other:
    addr: 6969
    proto: http
    bind_tls: true