You can generate additional routing information so that the system can route traffic to other subnets via a specified gateway. Large organizations often find it advantageous to divide their network into subnetworks, or subnets. You can group devices from different departments, floors and buildings into their own subnets, usually with network hubs and switches. You can use the Smoothwall Firewall to route traffic between subnets.
Note: This functionality only applies to subnets available via an internal gateway.
Procedure
- On the NETWORK menu, under the Routing submenu, click Subnets.
- Under the Add a new rule section, enter the Network IP address that specifies the network ID part of the subnet definition when combined with a Netmask value.
- Enter a Netmask that specifies the size of the subnet when combined with the network.
- Enter the Gateway IP address of the gateway device by which the subnet can be found. This is an address on a locally recognized network zone. It's important that the Smoothwall Filter and Firewall can route to the gateway device for the subnet to be configured successfully. The gateway address must be a network that the Smoothwall is directly attached to.
- Enter a router Metric to set the order in which the route is taken. This sets the order in which the route is evaluated, with 0 being the highest priority and the default for new routes.
- Enter a descriptive Comment of the rule.
- Click Add. The rule is added to the Current rules table.
Follow-up tasks
- To edit a subnet rule, under the Current rules section, select the relevant rule, click Edit, adjust the configuration and click Save changes.
- To delete a subnet rule, under the Current rules section, Mark the relevant rule and click Remove.