I somehow solved the problem changing the DNS of Windows 7 Client:
( image is next post as newbie i only can attach one image per post).
I supposed that the client was going to get DNS from ipfire.
@cibgiu my windows client is 192.168.0.5 which is in green zone, which netowork adapter in ipfire is setup to 192.168.0.1 and 255.255.255.0 …and 192.168.1.51 is the ipfire address ( virtualmachine of ipfire with the network adapters).
Im facing now, that my machine is ipfire.empresa… but i can only access it via https://192.168.1.51:444, not https://ipfire.empresa:4444.
Thanks in advance