HTTP Auth: IP
IP Authorization compares the requests IP address with the predetermined list of IP addresses. Access to the content will be granted only for allowed IP addresses.
Global IP list
Section titled “Global IP list”Global IP list available in Settings → HTTP Auth

In this list you can define single IPv4 addresses and IPv4 network address in CIDR notation.
User IP settings
Section titled “User IP settings”In the user settings you can define IPv4 address. In this case session could be linked to the user.