EU and Networking friends: How to make Cable Modem + Router dumb again?

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gigatexal

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Nov 25, 2012
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I've a Kabelmodem 7466CE with WIFI that came with my vodafone subscription for internet. I hate it. I hate there being anything other than just a modem that takes the analog and converts it to digital for use over the RJ45. So I am looking for guidance on if anyone has experience doing this and suggestions.

I don't know how to get it to do the analog to digital conversion, and then just pass those packets along on one or more of the ports (there's 4 on the back since it's a router) so that I can use it with my PF+{OpenBSD|FreeBSD} setup

OR... if anyone knows of a compatible modem for the EU that is all DOCIS compatible that doesn't do any routing that I could buy I'd be all ears.
 
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gigatexal

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Nov 25, 2012
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Is there a guide for how to do that? And is there a networking standard way to do it if I don’t use pfsense?

I guess I could do double NAT but ugh. I’m guessing the pure modem is banned from their network? Edit: I read the link. Bummer for sure.
 

Rand__

Well-Known Member
Mar 6, 2014
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yes they dont want to activate it any more apparently

And no idea on how to do it with your box, for mine its just this
upload_2019-2-23_11-9-20.png

The upper is a specific forward for exposing http to another box, the lower is the exposed host (sophos in my case) which does all the rest
 

Evan

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Jan 6, 2016
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So grateful that I have an ISP that give be just a dumb fiber in and Ethernet out modem and a single IPv4 public IP that you simply provide your own router for. (Regular ISP and normal retain product as well)

In the past when I had your situation I found no options when the ISP wanted their device to be a router and would not just bridge the connection.
 
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gigatexal

I'm here to learn
Nov 25, 2012
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From what I have read double NAT is not worth it.

If I can’t get this to work with my modem I’ll just repurpose the box into a development machine and stick my off the shelf Asus router with Wi-Fi that’s doing double NAT I think and this modem cum router
 

gigatexal

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What I had wanted was a stripped down and secure PF based router firewall with the ASUS router in just dumb Wi-Fi mode but I’m not sure how to pull all that off.

Stateside I had a simple cable modem a pfsense box and an ubiquiti AP alas
 

AveryFreeman

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Mar 17, 2017
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Is there a guide for how to do that? And is there a networking standard way to do it if I don’t use pfsense?

I guess I could do double NAT but ugh. I’m guessing the pure modem is banned from their network? Edit: I read the link. Bummer for sure.
I don't read german so the PDF manual wasn't much use for me, but generally these fancy-pants all-in-one jobbies have a setting you can enable called 'bridge mode', which kills absolutely everything on the device except for the modem functions - including all the RJ45 connectors except #1

I've done it several times. I agree, those things are garbage. Bridge mode usually makes them work 1000 times better (with a decent gateway like a Unifi USG or pfSense, etc.)

Edit: I tried this once on an Arris TG862G telephony modem and the VoIP functions still worked, just nothing else but modem/internet.

Also, be advised that the IP that will be available from the modem in bridge mode will be the public IP, so you MUST use a firewall.
 
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