topic Re: DNS and default gateway change with no internet in Archived Posts

DNS and default gateway change with no internet

Anony2565 — Fri, 19 Feb 2021 09:13:35 GMT

I have a problem with my router where the default gateway and DNS server is different than before. I get no Internet now and it only works when I reset it or manually set dns server on each device to 8.8.8.8

Default gateway is 172.16.11.82

And DNS servers are 87.237.17.169 and 87.237.17.201

I am not tech savy so would need a dumbed down explanation.

Thanks

Re: DNS and default gateway change with no internet

XRaySpeX — Fri, 19 Feb 2021 09:28:41 GMT

The DNS are auto set by EE whenever your router re-syncs. There's no reason for it not to work with EE's DNS. You may set it to Manual & enter whichever DNS you want to use.

Re: DNS and default gateway change with no internet

Anony2565 — Sat, 20 Feb 2021 12:59:54 GMT

I went into router settings into advanced settings and set DNS to manual and put it to 8.8.8.8 and 8.8.4.4

It only worked after everyone had to reconnect but everything stopped getting Internet after an hour or 2

Re: DNS and default gateway change with no internet

XRaySpeX — Sat, 20 Feb 2021 13:13:53 GMT

The DNS have nowt to do with your BB connection.

What lights are showing on the router when this happens?

What does it say after you log into the router:

For a BrightBox: in the Internet section on the initial Status page or
For a Smart Hub: on the Advanced Settings / Broadband / Internet page?

Obscure your names & any numbers in the BB Username but post the 1st 2 parts of the IP addy.

Is this for ADSL BB or Fibre? Which router, BrightBox 1 or 2 or Smart Hub?

Does the landline phone work? Do you get a dial tone? Does it announce your correct no. when you dial 1470 17070?

Re: DNS and default gateway change with no internet

Anony2565 — Sat, 20 Feb 2021 13:37:30 GMT

The smart hub colour is normal aqua blue thing which shows connected.

Landline is also fine and I get dial tone and correct number

If it helps this started happening after I failed to make a lan server and connected a different router but gave up and disconnected and reset the router.

Re: DNS and default gateway change with no internet

Anony2565 — Sat, 20 Feb 2021 13:45:37 GMT

I don't think pic uploaded so here it is again.

https://1drv.ms/u/s!Al_eZKS_zKwegbkAOU8VYKVbVHRyiw

Re: DNS and default gateway change with no internet

XRaySpeX — Sat, 20 Feb 2021 14:00:44 GMT

Don't worry, your images were awaiting approval. I have now done so & they should appear soon.

Re: DNS and default gateway change with no internet

XRaySpeX — Sat, 20 Feb 2021 14:02:04 GMT

You have a full speed BB connection.

What is the form of the BB username?

Re: DNS and default gateway change with no internet

Anony2565 — Sat, 20 Feb 2021 14:09:23 GMT

I may not say this correctly but I'll try

It goes PRODUCTION[5 capital letters][9 numbers]@fs

Re: DNS and default gateway change with no internet

XRaySpeX — Sat, 20 Feb 2021 14:13:22 GMT

Thanks, that's how it should be.

You should be having a full speed connection to the Net.

Re: DNS and default gateway change with no internet

Anony2565 — Sat, 20 Feb 2021 14:17:10 GMT

But I don't. I try to connect to a site on and it hangs for ages and says connection timed out. This is on my laptop. When I try on my phone and I disconnect for mobile data and connect to broadband it says connected without internet. It also hangs and connection times out when I try to use it.

I tried resetting it multiple times and it doesn't work.

Re: DNS and default gateway change with no internet

Mustrum — Sat, 20 Feb 2021 14:20:24 GMT

The default gateway does not seem right, is it normal for that router or has the internal ip range been altered?

Re: DNS and default gateway change with no internet

Anony2565 — Sat, 20 Feb 2021 14:27:57 GMT

Yeah the default gateway seems fishy to me as well it used to be something like 192.168 but now it's just that.

Re: DNS and default gateway change with no internet

XRaySpeX — Sat, 20 Feb 2021 14:43:22 GMT

The Default Gateway IP looks correct. Mine is 172.16.14.26. They are called "Private IP Address Lan".

The 192.168.x.y IPs are addys within your own LAN. The Default Gateway is the 1st node outside which your router is connecting to. It is a private IP within the BT network & serves as the access point to the rest of the Net.

Re: DNS and default gateway change with no internet

Anony2565 — Sat, 20 Feb 2021 15:05:17 GMT

I don't know why but when I changed the Internet from dhcp to static on my phone the DNS was 192.168.1.254 which is my broadband ip but I changed it to 8.8.8.8 and the I got Internet.

I don't want to have to set dns on all my devices l. It seems it can only work on static

Re: DNS and default gateway change with no internet

Anony2565 — Sat, 20 Feb 2021 15:34:40 GMT

Just adding that I don't have a LAN network.

Re: DNS and default gateway change with no internet

XRaySpeX — Sat, 20 Feb 2021 16:09:08 GMT

If you have a router you do have a LAN. You can see it under Advanced Settings / My Network.

Re: DNS and default gateway change with no internet

Anony2565 — Sat, 20 Feb 2021 17:19:31 GMT

It seems to work when I independently set a devices default gateway to the broadband ip

192.168.1.254

Re: DNS and default gateway change with no internet

Fortinbras_ — Mon, 23 Aug 2021 08:03:15 GMT

I have been having exactly the same problem with my Brightbox. Every mobile device in the house suddenly failed to connect to the internet. I discovered that, on each device, the DNS/Router address had switched to an incorrect one. The only way to get them back online was to reset each manually so that they pointed to the correct address. A day later I tested switching them back to auto, but they defaulted to the wrong IPv4 address again, losing their internet connection. I strongly suspect there is a problem with these routers. EE please take note.

Re: DNS and default gateway change with no internet

mikeliuk — Mon, 23 Aug 2021 08:44:42 GMT

Hi @Fortinbras_ ,

Did you make a note of the wrong IPv4 address they had switched to and were they consistent across all the misconfigured devices?

It sounds a lot like you have two DHCP servers running in your network and it would probably be good to isolate the root cause to ensure the security and integrity of your home network.

One simple explanation may be if you have connected any other network equipment recently such as an old router or network devices which plug into the wall with WiFi functionality. If you have a Linux device, it may be possible to investigate the rogue IPv4 address with nmap and nmap scripts to locate rogue DHCP servers.