IP Filtering for H815dw not working

Question

Hi, I recently got a H815dw printer and set it up on my local network.  I gave it a static IP and can connect to it fine to print, etc.  However, the printer is accessible (both for printing and the web tool) from any outside source.  This is quite vulnerable so I am trying to limit access to just a few IPs in my local network.  I have tried everything I could think of with the IP filter tool but nothing seems to work.  When I try to access the printer from an outside IP, it works fine (both web tool and printing).  Attached is a screenshot of a configuration I am attempting to use: Any help would be greatly appreciated, as I am not sure how else I can secure this printer.  Thanks. Ben