Transparent Firewall

Hello i'm try to build transparent firewall using instruction from
When i connect directly from Windows by bridge firewall all it's good. While i try connect VM on Windows with bridge adapter i not get connection.
In tcpdump i see on router DHCP Discovery and offer packet, in VM i see only DHCP Discovery. When i connect directly without transparent firewall VM getting IP from DHCP and all is okey.

Topic is to close. Problem resolved by connect unmanagment switch beetwen bridge firewall and PC.