Ignite TV - How to change DNS on XB6 (CGM4140COM) modem?

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Re: Ignite TV - How to change DNS on XB6 (CGM4140COM) modem?

@Datalink  Here are FAQ links for the Ignite WiFi Hub's Protected Browsing and Parental Controls:

https://www.rogers.com/customer/support/article/faqs-protected-browsing-ignite-wifi-hub

https://www.rogers.com/customer/support/article/faqs-parental-controls-ignite-wifi-hub

 

The thing about the XB6 is that it's not just a dumb modem; it's the hub for a whole suite of integrated connected home products and services that Comcast has developed under its Xfinity umbrella.  The Ignite TV bundle (with Internet / TV / Home Phone) is just the starting point for what we might expect.

 

However, it goes beyond that.  For example, the XB6 can also advertise secondary Wi-Fi networks.  The XB6 can enable an SSID to alert field technicians to network problems, and service providers can also leverage the install base of XB6's to provide public Wi-Fi hotspots to their customers.

 

Some of us will find it frustrating that we don't have total control over these devices, have relatively few configuration options on the admin screen, and have very little technical documentation.  There are no option settings to configure alternate DNS servers, no option to enable/disable AP Isolation, and limited control over the Firewall.  (I also did some digging and found a bit of information as to what the "Prefer Private Connection" option in the Connected Devices section is for.)

 

However, others will appreciate the integrated suite of connected home services that are designed to work together and where everything can be controlled through a mobile app.  In order to deliver this functionality and to prevent things from breaking, it also means that the XB6 is effectively a cloud-managed device with very few local configuration options.



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Re: Ignite TV - How to change DNS on XB6 (CGM4140COM) modem?

Seriously? I can't use my pihole without spending another 100$ to buy an extra router.... I've had rogers for a total of 9hours now and I'm really regretting the swap... The modem doesn't even have basic settings available... I was able to do it with the previous ISP without any issues to the TV system btw... There's no reason why I should be forced to use rogers DNS servers....
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Re: Ignite TV - How to change DNS on XB6 (CGM4140COM) modem?

Someone else who had ignite but is using bridged with the TV boxes may need to chime in... but I wonder if the way they have it set up, that the TV boxes need the rogers DNS server???

Depending on what else you are trying to do.. about 75% of devices, you can enter the DNS manually on that device itself, if you specifically need it.

I have 90% of my devices all just use the rogers DNS.  But I do have my desktop, while both on dynamic IP addresses, using static DNS entries.



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Re: Ignite TV - How to change DNS on XB6 (CGM4140COM) modem?

I have, and have tested with Quad9, Cloudfare and OpenDNS. However, I have no idea whether the Xi6's resolvers actually use these servers or have the Rogers DNS servers statically assigned. All that I could see was that nothing broke. (I have not tried testing further by configuring a deliberately-broken DNS server into my router.) I currently just use the Rogers servers; I try to keep my non-standard setup as standard as possible. I do not have a pihole box so I cannot test that configuration.


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Re: Ignite TV - How to change DNS on XB6 (CGM4140COM) modem?

I would also like to be able to change my DNS settings. 

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Re: Ignite TV - How to change DNS on XB6 (CGM4140COM) modem?

Hi! We have had 2 Nintendo switches connecting just fine to our ignite wifi for months now. All of sudden this afternoon both of them refused to connect with DNS error codes. We have done all the usual fixes ie hard reset of modem and game units. Tried chat service but three times timed out and disconnected. Anyone help??

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Re: Ignite TV - How to change DNS on XB6 (CGM4140COM) modem?


@Mimi7 wrote:

Hi! We have had 2 Nintendo switches connecting just fine to our ignite wifi for months now. All of sudden this afternoon both of them refused to connect with DNS error codes. We have done all the usual fixes ie hard reset of modem and game units. Tried chat service but three times timed out and disconnected. Anyone help??


Hi and welcome to the Community!  Did you happen to enable Parental Controls or enable Protected Browsing?  The Ignite Parental Controls intercept DNS to control access to the Internet.  If a device's Internet access is being blocked, you will suddenly start seeing DNS resolution errors on the affected device.



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Re: Ignite TV - How to change DNS on XB6 (CGM4140COM) modem?

Is there seriously no way to set DNS on the new Ignite gateway? This is basic functionality and I can only assume it's because Rogers wants to harvest DNS data which is super shady.

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Re: Ignite TV - How to change DNS on XB6 (CGM4140COM) modem?


@randomthoughts wrote:

Is there seriously no way to set DNS on the new Ignite gateway?


No, not at the moment.

 

This is basic functionality and I can only assume it's because Rogers wants to harvest DNS data which is super shady.


Not being able to configure a custom DNS server makes it a pain to deploy something like a Pi-hole server but it does not really affect your privacy as much as you might think.

 

DNS is one of the last remaining protocols whose data is transmitted unencrypted, so using a non-Rogers DNS server will not stop anybody (who can monitor network traffic) from harvesting that data.  If you are concerned about DNS privacy, you would need to use DNS over TLS or DNS over HTTPS.  But even that is not good enough.

 

Once you resolve the address and start connecting to web servers with secure HTTP, you can still gain quit a bit of information from SNI and OCSP traffic.  You also can't hide the IP addresses of network connections that you make, and the network connections that you make when visiting a web page results in a fairly unique fingerprint.  

 

If you are concerned about being tracked, you would need to connect to the Internet using a VPN, and then the challenge will be to find a VPN service provider that you trust, and then configuring your network and devices so that you do not leak information to anybody (whose attention you may have grabbed) that may now be monitoring your network traffic with even more scrutiny.

 

Or you can just use the Rogers DNS servers, which actually perform fairly well and which will also help ensure that you connect to optimal local CDN servers when using popular online services.