I understand this is a test setup, but the first question is... why are you using public IP's on your LAN?
Then... instead of us making assumptions, provide a network map to show how are things connected, so we can get a better view of your objective.
Lastly, what is your objective? Why are there two firewalls? Is there a reason 192.168.10.0/24 needs to be behind a 2nd firewall?