|BTW I asked for a ipconfig /all since that tells me if static or dhcp workstation ip assignment. I am going to assume from your statement the server and workstations have static ip.|
What you want to do is go into the router and disable the dhcp server.
You change the lan from 126.96.36.199
to 188.8.131.52 in the router.
I am assuming you have no true gateway since you have not had internet connection.
Once you make these changes in the router you can then connect it to the hub and yank out the wireless cards. You will have internet access to all workstations and server without having to make any changes on the linux box.