I have a small firewall (s-box) connected to my internet cable modem, that has an internal DHCP server. 3 PCs connected by cable to the s-box. Now I've connected a TP-LINK wireless router to the s-box and I would like to add my laptop to the same network by wireless connection. WAN entry of the TP-LINK is now connected to the s-box. LAN entry can connect to any of the PCs but not necessary. Problem is that the TP-LINK has its own subnet IP (192.168.1.1) and so my laptop is in a different subnet than rest of network. When trying to set the TP-LINK IP address to same subnet mask of the network, I get error message. Disabling the DHCP option of the TP-LINK causes a limited wireless connection in my laptop (no IP address). How can I set the router to work as hub?