Clicking the Routing navigation option will give you five subnavigation options – NAT, Port Forwarding, Routing Table, Static, and OSPFv2.
NAT
If you wish to run NAT on your BMU, you can configure it here. You have two options when configuring NAT – Many to 1 or 1 to 1. A Many to 1 NAT rule will masquerade many local addresses to a single external address. A 1 to 1 NAT rule will directly map all communications to a single external address to a single internal address.
When adding a NAT rule, you can specify the source, the destination IP that should be used and the interfaces.
Port Forwarding
You can configure port forwarding here against existing many to 1 NAT rules. Port forwarding allows traffic to a single external port to be mapped to a specific internal IP and a specific internal port. 1 to 1 NAT rules will port forward all traffic on a 1 to 1 basis by default (e.g. external traffic on port 80 will be mapped to the internal IP on port 80).
Routing Table
The routing table displays the entire BMU routing table in real time. You cannot make any modifications on this page – it is simply a live view of the known routes.
Static
The static page allows you to add, edit and delete static routes. Upon initial configuration, you will add your default route here with a network of 0.0.0.0 and a subnet mask of 0.0.0.0.
OSPFv2
The OSPFv2 page allows you to modify your OSPFv2 configuration. By default, all interfaces are set to passive mode – you will have to add an interface to the Interfaces tab to enable OSPF. You can disable the default passive mode under the Instance tab.
Each tab allows you to modify a separate part of your OSPF configuration, they are described below.
Interfaces
The interfaces tab allows you to modify interface configuration. You can set the authentication type, OSPF timing parameters, the network type, the cost and whether or not the interface is passive.
Instance
The instance tab will allow you to make modifications to the OSPF instance. The BMU currently only supports a single OSPF interface. Here you can set your router ID, set route redistribution options and default metrics.
Areas
The BMU has a single area setup by default, area 0.0.0.0. The BMU only supports dotted quad areas (e.g. 0.0.0.0) rather than integer based areas (0) but they are interchangeable with most routers that utilize integer based areas (e.g. 0.0.0.0 is functionally identical to area 0 in a Cisco router).
Networks
Here you can add, edit and delete the networks you wish to advertise via OSPF. You must add the peer IP on a physical interface to allow OSPF to run on that interface, even if you have redistribute connected enabled.
Neighbors
The neighbors tab will update in real time and show the status of all OSPF neighbors.