TRENDnet Ethernet Over Coax MoCa 2.5 Adapter (2-Pack), TMO-312C2K, Backward Compatible with MoCA 2.0/1.1/1.0, RJ-45 Gigabit LAN Port, Supports Net Throughput up to 1Gbps, Support up to 16 Nodes, Black

u/HoldTheSneeze, setup looks generally correct, but with notes Re: current setup/photos ... splitters are not models recommended for use with MoCA; top-level splitter would ideally be just a 2-way if you only have the 2 downstream rooms needing connection; "PoE" MoCA filter should be moved to the input port of the top-level splitter to maximize its reflective benefit; "prophylactic" MoCA filter at the gateway could be moved to the splitter output port directly feeding the gateway, to avoid the filter from acting as a physical level and damaging the gateway coax port; choice of TrendNET TMO-312C is questionable given same cost for goCoax MA2500D. cannot get internet on my laptop via the Ethernet cable when I test. Just for clarity, I'd suggest walking through the connection points... what does the laptop measure when hard-wired to an Ethernet LAN port on the primary router? if you temporarily move the 2nd MoCA adapter to the router location and direct-connect it to the main MoCA adapter at the router using a short coax cable, what does the laptop measure when hard-wired via the 2nd MoCA adapter? Critically, your photos and setup description above lack any details on how the Xfinity device and primary router are wired, and how the MoCA adapters are wired via Ethernet. The setup should resemble the diagram previously posted: https://i.imgur.com/cthKykB.png The MoCA status LEDs indicating a connection but the laptop failing to get an IP or communicate via Ethernet would be a symptom of the main MoCA adapter's Ethernet port being disconnected or the main MoCA adapter being wired via Ethernet to the modem rather than the primary router.