Figure 3.4.1.1.2.c Advanced Setup –MER- NAT, Firewall, IGMP Multicast and WAN service
Check to Enable/Disable NAT, Fullcone NAT and Firewall functions.
Use "Advanced Setup -- Security" to assign filter rules.
Check to Enable/Disable IGMP Multicast and WAN Service.
Click on "Next" to go to next step.