How can I deny, allow, or ignore an entire subnet using Juggernaut Firewall?

Juggernaut Security and Firewall uses CIDR (Classless Inter-Domain Routing) notation rather than the common subnet mask 255.x.x.x when blocking, allowing, or ignoring networks.

For example if you wanted to block the 255.255.255.0 network for IP address 203.0.113.1 you would go to Deny -> Press the Add button on the grid and enter it as 203.0.113.0/24

Refer to the CIDR Subnet Table to find the CIDR equivalent of a decimal subnet mask.

IPv4

CIDR Prefix Total IP Addresses Network Mask
/8 16,777,216 255.0.0.0
/16 65,536 255.255.0.0
/24 256 255.255.255.0
/25 128 255.255.255.128
/26 64 255.255.255.192
/27 32 255.255.255.224
/28 16 255.255.255.240
/29 8 255.255.255.248
/30 4 255.255.255.252
/31 2 255.255.255.254
/32 1 255.255.255.255


IPv6

CIDR Prefix Total IP Addresses
/64 18,446,744,073,709,551,616
/56 256 /64 subnets
/48 65,536 /64 subnets
  • cidr, subnet, deny, allow, ignore
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