What is the advantage of a public IP address over a private IP address?

With a fixed public IP address, you can connect to your device from any computer anywhere. There is no need to set up a VPN tunnel. This is an ideal solution for customers who do not have a firewall or who do not require the configuration of a VPN tunnel of any kind. However, since it is a public IP address, the device is open to anyone who can connect if they know the IP address.
Therefore, this means less security for a customer. If you have a 3G/GPRS router, it is strongly recommended that you set up a login page so you can stop unauthorized access.