Interface can be accessible:
LAN only
LAN/WAN
If LAN/WAN is chosen, a WAN Connection Access Settings form will be
displayed.
This field allows you to restrict web admin access only from defined IP subnets.
Any - Allow web admin accesses to be from anywhere, without IP address
restriction.
Allow access from the following IP subnets only - Restrict web admin access
only from the defined IP subnets. When this is chosen, a text input area will be
displayed beneath:
The allowed IP subnet addresses should be entered into this text area. Each IP subnet
must be in form of w.x.y.z/m
Where w.x.y.z is an IP address (e.g. 192.168.0.0), and m is the subnet mask in CIDR
format, which is between 0 and 32 inclusively. For example: 192.168.0.0/24
To define multiple subnets, separate each IP subnet one in a line. For example:
192.168.0.0/24
10.8.0.0/16