Link Aggregation or Bonding

I currently have a Protectli device running IPFire. This Protectli has 4 ports. I initially set up IPFire with the standard Red-Orange-Blue-Green zones, but have found it unnecessary to run my three Ruckus APs outside the Green zone. I’d like to use the unused “Blue” interface as a failover for the network. Is there a way to do this through the WUI or will this need to be done through the command line?