I added the IP to the DMZ but nothing changed, the computer still has access to the LAN, I actually don't understand what DMZ does, worthless. So what I did, just made a firewall rule on the clients machine denying access to 192.168.0.2-192.168.0.254 range, allowing only 192.168.0.1 (router).
btw is there a newer firmware version for my router ?
Product Page: DIR-615
Hardware Version: B2
Firmware Version: 2.26RU
Thank you.