What does the N750 and N900 do specifically?

I’d like to know if the N900 will allow Wake-On-Wan, I need to wake my PC from the internet for remote desktop access.

It either needs to allow port forwarding to the broadcast address i.e. 192.168.0.255 (so I can forward the magic packet to the LAN), some firewalls don’t allow this  OR if it doesn’t allow that, does it allow the DHCP subnet mask to be set to 255.255.255.128 allowing 192.168.0.127 (for example) to be used as the broadcast IP? (some firewalls don’t allow anything to port forwarded to *any* broadcast address, some just block the broadcast addrest for the normal 255.255.255.255 subnet setup)

I’m using the 192.168.0.127 technique with my current router, and want to make sure port forwarding works for normal broadcast or the technique above before replacing my current router with a new one.