I can do a speedfusion if the balance is in a DMZ?
Can you please provide detail info what you want to achieve using SpeedFusion ? As long as the Balance WAN is active and TCP-32015, UDP-4500 is allowed the speedfusion should able to establish.
the balance would be in the LAN network with a DMZ and seek connect a max hd2 by speedfusion to the Balancer
The MAX HD2 can point to the WAN public IP of the Balance in the DMZ network. If the DMZ is private, TCP 32015 and UDP 4500 need to be forwarded to the Balance.
We have a KB article here if port forwarding is needed.