When I try to log in to the router via the VPN BTTH service using the web interface or Winbox, I cannot log in and I see the message: Authentication failed: invalid username or password .
From the browser I can see the router's login page, I can view the charts but I cannot log in.
Default firewall config allows most things for channel=input only from LAN interface list. The same goes for winbox MAC connectivity. It you want to manage your router via BTH, then you have to add BTH interface (whatever it's called) to LAN interface list.