DNS Settings on Eltex Router
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Corso Marche

Original Poster:

1,906 posts

232 months

Sunday 10th March 2019
quotequote all
I've an Eltex NTE-RG-1421G-Wac router here connected to a fibre line run in by the local ISP/telco.

I've logged into the router and run through all the settings, but I can't find anyway to actually change/customise the DNS setting. It seems to be locked by the ISP. Under the PPPoE settings the router utilises a username (account number) and password to connect to the ISP. Is this why I can't access any settings locally in the router to modify the DNS ?

I've a mesh wi-fi system plugged into the Eltex router via a LAN port and the wi-fi is disabled on the Eltex, but even though my own wi-fi setup has custom DNS settings the likes of Netflix still use the default DNS settings from the ISP, and Netflix is the one service which is having issues in recent weeks. NF support are insisting the problems relate to the DNS used by the ISP, hence my attempt to alter the DNS settings on the Eltex, But alas, that doesn't seem possible.

Am I missing something, or does anybody have any advice to offer ?

maffski

1,905 posts

190 months

Sunday 10th March 2019
quotequote all
Can you disable DHCP on the Eltex and enable it on the mesh to provide the settings you want?

Corso Marche

Original Poster:

1,906 posts

232 months

Sunday 10th March 2019
quotequote all
I have DHCP disabled on the Eltex, and the mesh system manages 1 fixed IP address which I set on the internal network, that of the NAS.

No obvious way of managing the DNS of the Eltex router.

BigTZ4M

237 posts

202 months

Monday 11th March 2019
quotequote all
How are the devices with Netflix getting their IP addresses?

If your Mesh system is doing DHCP for you then you should be able to tell that what DNS settings to give to clients leasing an IP address from it, over-riding what your ISP is telling your router. Then the only thing that won't be using the DNS you want is the router itself but since it's not doing anything with that information you should get the outcome you require.

Corso Marche

Original Poster:

1,906 posts

232 months

Monday 11th March 2019
quotequote all
That's what I always firmly believed, and how I had it setup. The mesh system was configured to use Cloudflare DNS.
Netflix started giving grief about 3 weeks ago, and whilst most devices on WiFi report a DNS which makes sense and can be connected to Cloudflare, the Netflix app on two of our Xiaomi MiBox 3's reports a local DNS from our ISP!
I didn't believe it at first, and I'm still puzzled by it!

BigTZ4M

237 posts

202 months

Monday 11th March 2019
quotequote all
How strange. Maybe you've left your upstream router's IP as a tertiary DNS on the mesh system as well as cloudflare?

I've only heard of Netflix not playing ball when you're trying to use a smart DNS or VPN service to bypass geo restrictions as well, not normal usage (I assume you and your ISP are based in the same region you are trying to watch)

I don't know the Xiaomi boxes but if I assume they are typical of Android boxes then could you try hardcoding IP and DNS servers into the boxes themselves to test?

Corso Marche

Original Poster:

1,906 posts

232 months

Monday 11th March 2019
quotequote all
Yeah, NF is running, but in most instances any chosen video will drop out after 5-15 minutes of playback, then reload slowly to 99% and sit there indefinitely. Once it hits 99% we exit back out of it and then enter again and it'll play for another 5-15 minutes.
Done all the sensible stuff with clearing cache and app data, removing the app and reinstalling etc etc etc
But it's a NF problem as it'll do the same playing in a web browser on a Chromebook.

NF support insist it's the DNS from the ISP. That was when I discovered the android tv NF apps were displaying our ISP's DNS, while other devices return the DNS I've set on the mesh network.
But android tv seems funny, if I run Puffin TV browser it'll return DNS servers from their parent company in the states, similar to NF it's using a different DNS to what I've set on the network.
It would appear android tv (8.1) has some odd peculiarities in handling DNS and network traffic. At first glance it appears apps can choose other DNS lookups once they've found an internet connection.

For now I've placed an app on one of the MiBoxes and configured the DNS to that of Google DNS, and left the other MiBox alone. The app has been successful in making the NF app return Google's DNS servers, but NF behaviour hasn't changed, reinforcing my guess that the issue is likely with their app or local servers.

The ISP reset everything today on our account, and even sent two guys out to do a full hardware reset on their Eltex router, but NF is still the same.
So I'll be escalating last week's issue and lodging a more formal complaint.

mattley

3,039 posts

253 months

Monday 11th March 2019
quotequote all
Corso Marche said:
I've logged into the router and run through all the settings, but I can't find anyway to actually change/customise the DNS setting. It seems to be locked by the ISP.
This is normal on ISP supplied routers.