Is it possible to lock down ethernet ports or lock down by MAC Address?

Question

Is it possible to lock down ethernet ports or lock down by MAC Address?

I am trying to prevent any other device other than my main router from being able to succefully connect to the modem ethernet ports.

FURRYe38 · Answer

What NG product model are you referring too?&nbsp;

NDKoze · Answer

I am sorry. I thought I put that in there.It is a&nbsp;CM1200 Nighthawk® Multi-Gig Cable Modem

FURRYe38 · Answer

This is a modem only. No built in router here.&nbsp;

NDKoze · Answer

I understand that. But, the modem has 4 ethernet ports on it and I want to know if it is possible to lock them down either totally or by MAC Address.&nbsp;I only want my one Netgear Router to be attached to the modem and work.

Kitsap · Answer

In general, the only port on the back of your CM1200 that is active is port 1.&nbsp; Port 2 can be activated for a Link Aggregation (LAG) connection.&nbsp; LAG can be activated from the modem user interface.&nbsp; Ports 3 and 4 are active only from limited service providers that can provide more than one IP address for a modem.&nbsp;Out of the box, ports 2 through 4 should have had a blank black plug installed.&nbsp; There are more details in the user manual and setup guide.&nbsp; They can be downloaded from the Downloads section at the top of the page.&nbsp;&nbsp;

Forum Discussion

Is it possible to lock down ethernet ports or lock down by MAC Address?

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