This section is used to add an unlimited amount of custom networks. The defined networks can be grouped with additional networks or host entries for a later usage on different firewall rules.
The name of the network can be chosen freely, but requires to be unique on the system. Allowed characters are upper- and lowercase letters, digits, space and dashes.
The given network address has to be a valid IPv4 subnet without netmask - for example192.168.0.0.
The netmask or subnetmask of an IPv4 network is a descriptor for the size of the network. It also can be used to divide a network into two or more networks. The used subnetmask can be specified in dotted-decimal notation (e.g. "/24") or in classless_inter-domain_routing (e.g. "255.255.255.0").
As an optional feature you can add a remark.
On the listing, some more items are displayed. The column Used" shows how often a created network entry is used as part of a network group or firewall rule.
The yellow pencil offers the ability to edit the content of an entry. With the trash icon an existing and unused entry can be deleted.