Balance 30 problem of NAT

Hello I have a peplink balance 30 firmware 6.3.3 build 3231, I have address statically stacked on my internet connection, but I can not configure them on the peplink. Is there a solution, thanks in advance

Yes, you can set a WAN to use a static IP address. Look at page 98 of the manual http://download.peplink.com/manual/Peplink_Balance_v6.2.2_user_manual.pdf