My ISP (Hyperion S.A.) provides internet using a UTP cable with MAC filtering. I'm trying to set up a router so that I can connect multiple computers to the network. Most computers would connect through Wifi.
I have a Linksys WAG160N which I'm trying to set up. It has a MAC Address Clone feature so MAC filtering isn't an issue (I can also call them up to change the MAC). I've tried configuring it as RFC 1483 Bridged as well as Routed (using the IP I got when connecting from my PC directly).
When connecting a PC to the router it seems to be configured from the ISPs DHCP instead of the router's. Browsing to any page redirects me to a page saying the MAC address is incorrect. The router is configured with DHCP and NAT enabled. There's no Ethernet WAN port, so I'm just plugging the UTP cable into the first port, but I guess any connected computers are detecting the ISPs DHCP since there are effectively two DHCP servers on the network. I would have thought the NAT would prevent that since it's on a different subnet though.
Is there any way to set up this router to make it look like there's one computer from the ISP's perspective but NAT all traffic behind it? It seems like a basic set up, so I'm probably missing something obvious. I'm currently sharing the ethernet connection through Wifi from my laptop using an Adhoc hotspot. If my laptop can do it, surely a router can?
Do I need to install OpenWRT/DD-WRT on the router to support this? DD-WRT says the router isn't supported, but it seems it's only because there's an integrated modem, which I don't care about.