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Try setting DCHP instead of PPPoE. Whats the IP address the DIR is getting from the ISP Modem? The modem maybe a in bridge mode. Thats a modem with a built in router.
WAN IP is on the first picture you posted for HOME. If you didn't blank it out, it will be shown there. Is it a 10, 192 or 172 address here? You'll need to contact your ISP and ask them about using DHCP with the router. You need to find out of the modem is actually bridged or not. You can use the modem in either router mode or bridged mode probably. Can try this on the DIR router aswell:li]WAN Port Speed set to Auto or specific speed? Some newer ISP modems support 1000Mb so manually setting to Gb speeds can be supported by the router. Internet>Go To Settings/WAN Port Speed[/li][/list]
So it's working now?