The ePMP 1000 hotspot and E500 and outdoor units. The ePMP1000 hotspot acn be grounded using these instructions. http://community.cambiumnetworks.com/t5/ePMP-Installation/ePMP-Grounding-and-Lightning-Protection-Diagrams/m-p/63227#U63227
The E500 does not have a grounding screw. Instead, you can follow the instructions here for lightning protection http://community.cambiumnetworks.com/t5/cnPilot-E-Series-Hotspot-E500/e500-Lightning-Protection-info/m-p/67510#U67510
You can configure ACLs and DNS ACLs under WLAN (WLAN->Access)