How To Create IP/Application Routing Rules

The IP/Application Routing section lets you create rules based on source IP address, application, and/or destination IP address that exempt outgoing traffic from link balancing and/or NAT'ing. Traffic matching no rule continues through link balancing and NAT'ing. These rules are executed regardless of the firewall operating mode.

Create an IP/Application Routing Rule

1. Log into the Barracuda Link Balancer Interface.
2. Go to the POLICY > Outbound Routing page.
3. In the IP/Application Routing section, enter a unique Rule Name.
4. In the Source IP Address field, enter the IP address (e.g. 10.0.0.1) to be NAT'd.
5. In the Source Netmask field, enter a netmask (e.g. 255.255.255.255) or leave this field blank.
6. From the Application list, select * for any protocol or port combination or select an application.
7. Complete the action fields to specify what happens to traffic matching the condition:
   • Link Balance - Select Yes to link balance outgoing traffic across any available WAN interfaces. 
     Or, select No and then select a Primary and a Backup link:
     • Primary Link:
       • Default - Outgoing traffic is directed to the WAN link on the same subnet.
       • Or, select a specific link from the list to bind traffic to that link.
     • Backup Link:
       • None - Drop traffic if the primary link is not available.
       • Or, select a specific link from the list to bind traffic to that link.
   • Clear the NAT check box to maintain the original source IP address.
8. Click Add.

The new rule is now added to the bottom of the IP/Application Routing table.