Configuring server load balancing in pfSense involves two steps. First, you must create one or more virtual-server pools. Second, you must create one or more virtual server (the server to which clients will actually connect).
To begin server load balancing configuration, navigate to Services | Load Balancer. There are four tabs available: Pools, Virtual Servers, Monitors, and Settings. Configuration begins on the Pools tab; on this tab, click on the Add button to add a server pool.
On the pool configuration page, enter an appropriate name in the Name edit box. The next field is the Mode drop-down box; the choices are as follows:
- Load Balancing: This will balance the load across all servers in the pool
- Failover: The first server in the pool is used unless it fails; then it fails over to other servers in the pool
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