Netgate 8300 - Page 70

Security Gateway Manual Netgate-8300
Create a Private Networks Alias
Create an alias using all RFC 1918 networks (listed in the example below) or at least an alias containing the local/private
networks on this firewall, such as VPNs. Using all RFC 1918 networks is a safer practice.
• Navigate to Firewall > Aliases
• Click Add
• Configure the alias as follows:
Name
PrivateNets
Description
Private Networks
Type
Network(s)
• Add entries for:
– 192.168.0.0/16
– 172.16.0.0/12
– 10.0.0.0/8
• Click Save
Add Firewall Rules
With the alias in place, the next task is to create firewall rules for the interface.
• Navigate to Firewall > Rules, on the OPTx tab (or the custom name)
Allow DNS
Add rule to allow DNS requests from local clients to the firewall itself or other DNS servers.
• Click to add a new rule at the bottom of the list.
• Configure the rule as follows:
Action
Pass
Interface
OPTx (or the custom name)
Protocol
TCP/UDP
Source
OPTx subnets (or the custom name)
Destination
This Firewall (self)
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