ISP requires route MAC and serial, pfSense replacement router HOWTO

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coffeeprogrammer

Well-known member
Jul 19, 2021
195
20
I recently finally got my ISP to get me to downgrade to the $30 a month plan, which was a lot much work than something like that should be. I did it because I don’t really use much bandwidth. YouTube would be the bulk of it and I have not noticed any difference after the down grade. I did switch to my own router, a TP link from walmart. It seems my ISP, fidium, requires that I give them not only the router MAC address, but also the router serial. The connection is locked to the MAC address and the serial. I can clone the MAC address on pfSense, but I am not sure about how to deal with the serial number. I noticed that pfsense shows a serial number after it boots, so it is possible I just need to give them that. I would rather clone what is needed because I maybe want to try out different routers or different hardware over time and don’t want to have to call my ISP every time. Also, I just want to know exactly what is happening.

While thinking it over, my guess is that my ISP, fidium, is using some DHCP options to get vendor information from my tp link walmart router. The problem is, I am not sure what those options are exactly. I don’t own a network tap, so I am not sure how I could capture the packets between the router and the modem suppled by the ISP. The line between them is in fact just an ethernet connection.

Does anyone have any idea how I can clone the required settings so that I swap out routers whenever I want and I don’t have to contact my ISP? Is my thinking correct that the serial number is being collected via DHCP options? I see pfSense allows DHCP options to be set on the WAN interface, which might have the ability to clone a serial number. Thanks.
 
If they expect a certain device to be present, it's best to not mess with their needs. Just put your own device in front of theirs. Double NAT is not optimal, so maybe you can configure their device to be in "bypass" mode, but even if you can't it should still generally work fine. The benefit is the ISP will have no visibility into your network, and you will be able to override things as you see fit.