Knowledgebase

Overview

Juggernaut Security and Firewall utilizes Classless Inter-Domain Routing (CIDR) notation to define network ranges for deny, allow, and ignore rules. This method replaces traditional decimal subnet masks with a standardized prefix length format.

Configuring Subnet Rules

1. Navigate to the target rule category: Deny, Allow, or Ignore.
2. Click the Add button within the configuration grid.
3. Enter the network range using CIDR notation. The required format is the base IP address followed by a forward slash and the prefix length.

203.0.113.0/24

Note: When converting from a standard subnet mask, ensure you use the network base IP rather than a specific host IP. For example, to block the 255.255.255.0 range associated with 203.0.113.1, enter 203.0.113.0/24.

CIDR Reference Tables

Refer to the tables below to convert decimal subnet masks and IPv6 prefixes to their corresponding CIDR notation.

IPv4

IPv6

Troubleshooting & Common Issues

• Invalid Format Errors: Ensure the entry strictly follows the IP_Address/Prefix_Length format. Decimal masks (e.g., 255.255.255.0) are not accepted in rule fields.
• Incorrect Network Base: Verify that the IP address used represents the network base, not a specific host within the subnet.