How to secure remote management 4G Gateway device?

Answer:

For security reasons, the external management connecting interface should be disabled and only local management allowed. (The management default setting of EW50 and EW200 on 4G LTE Web and WAN port is disabled.)

• When will you need to remotely access the 4G gateway?
  When you need to do maintenance and remote management.
• How to enable a management interface of WAN port?
  Temporarily enable and disable the interface via the SMS only when WAN port is a public IP.