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Your question is not really specific to Firewall Builder.
192.168.3.0/24 is a network, and you should create a network object in Firewall Builder. The "/24" CIDR notation represents a 255.255.255.0 netmask.
Oh, so a network object with 192.168.3.0 as the IP address and 255.255.255.0 as the subnet mask represents the IP address range of 192.168.3.0 - 192.168.3.255 ?
Oh, so a network object with 192.168.3.0 as the IP address and 255.255.255.0 as the subnet mask represents the IP address range of 192.168.3.0 - 192.168.3.255 ?
192.168.3.0 is the network address. The last "0" in the subnet mask means the network covers the 0-255 range.
I think you'll find it well worth your time to take a closer look at how IP subnettingworks.
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