You configure the Allow list to allow access only from specific IP addresses or from ranges of IP addresses. If nothing is configured, then all IP addresses are allowed.
You can use two different syntax for lists of IP addresses:
A list of line separated IP addresses:
A range of IP addresses in CIDR notation on one or many lines:
You can also use a combination of both.
EcoStruxure BMS does not accept other syntax for specifying IP range, eg. 10.0.0.0 - 10.0.0.255