Can't Access Some Websites on WiFi but I Can By Hotspot

I am on EndeavourOS, KDE, using Brave browser.
I found that some websites I could access before normally that I can;t access them through my home WiFi.

I changed and tried several DNS in Brave browser, tried the same links on FireFox but couldn’t reach them.
I am generally browsing very normally but some website do not work. (now specifically https://manjaro.org/ which gave me:

This site can’t be reached
manjaro.org took too long to respond.
Try:

Checking the connection
Checking the proxy and the firewall
ERR_CONNECTION_TIMED_OUT

and https://wiki.archlinux.org/title/System_maintenance) which gave me:

This site can’t be reached
The webpage at https://wiki.archlinux.org/title/System_maintenance might be temporarily down or it may have moved permanently to a new web address.
ERR_QUIC_PROTOCOL_ERROR

I could reach them through hotspot but not through normal WiFi.
I connected through hotspot on my phone and I could easily access them.

By the way, my ISP for both home ADSL and mobile data is Vodefone, I mean it is the same ISP.

Why and how is that?

What can I do to fix this? Any body had such strange issue?
I will highly appreciate any guidance.

Thank you

UPDATE:
I called ISP, they sorted it out and told me they changed the server my router was connected to to a newer server! This is funny. But I got it working now. I don’t know what does a server has to do with the websites to access or not to access. It is supposed to be a firewall or policy!

Guess they where talking about a so called DNS (or Domain Name Server). That “translates” names of websites to a so called IP addres. Mobile internet follows a different route over the mobile connection of your phone, often through 5G ,and is not using your home wifi or ethernet, that would explain why you could surf with your phone.

That is they were using a DNS that couldn’t resolve it?
Thu funnies thing that today on the old server I couldn’t access google drive in browser! I wonder how they could even do it!

Well the old server probably had some problems and was switched off. But they forgot to change the IP address to the new one in your modem.

That was so stupid of them. I never thought this could ever happen even.
I assume there is a check list and procedures with a check list to do anything! Anyway, I understand it is a human who does this, and it is normal that humans do mistakes. I understand this.

Well if you want you can always use a different DNS server in your network settings, if you do a search for DNS servers you will find them.

I recommend Quad9 for DNS

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Thanks a lot @MyNameIsRichard
I see it says on their website

“Quad9 is a free service that replaces your default ISP or enterprise Domain Name Server (DNS) configuration.”

Replaces means my ISP will not see what websites or queries I do?
All what i need is to perhaps add another DNS in the browser (Brave browser) with 9.9.9.9 and 149.112.112.112

What about other apps, how can I make it system wide to work with other apps like pCloud or any other app?

I set my DNS in Network Manager so it’s system wide. Set the method to Automatic (Only Addresses)

Edit: You can probably set it in your router to make it network-wide

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Thanks again @MyNameIsRichard

So, Iguess I should add the 2 addresses above somewhere here in this window. Right? But I am not sure where to put what exactly.

I really appreciate your support.
Amazing community as usual.
As I said in another post, I never ever enjoyed any distro or community since 2000 as here.


I appreciate your support.

  • Change Method to Automatic (Only Addresses)
  • Other DNS Servers will change to DNS Servers
  • Enter the IPV4 addresses in there, comma separated
  • Do the same for IPV6

Simples.

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Is this OK? I did the same for IP6


Sorry for asking too much, but I want to be sure that I won’t mess things up.

Looks good to me. Save your settings and disconnect / connect your network. If it doesn’t work, you can just go back to Automatic anyway.

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Thanks @MyNameIsRichard
Does this makes my ISP not seeing what I do or what websites or queries I do? Did I get it right from what they said

Quad9 is a free service that replaces your default ISP or enterprise Domain Name Server (DNS) configuration.

Or it means it just replaces the DNS of my ISP only?
Do I need to add it in Brave browser? Or it is now default for all apps including browser?

Your ISP can see all of your traffic if they want to, that’s one reason VPNs are so popular. They are probably not inspecting everything though. ISPs tend to log access to their servers, so replacing the DNS gives them one less thing to look at. Quad9 are, in my experience, very fast DNS servers as well.

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Thanks @MyNameIsRichard

I repeat again I really appreciate your support and help.
I never ever since I started Linux in 2000 enjoyed a community like here or a distro like EndeavourOS and never ever learned that much from any community.

I use also Quad9. It is set in the router at home so all the devices get the same. Also on cellular phone I use it for when I am out. It has been working fine for me so I have kept it.

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This sounds to be a great idea.
We will be having all the benefits. I guess not using google DNS will give us even more privacy. Sometimes I feel google knows about me even more than what I know about myself.

Oh yeah, they know things about you that you don’t want anybody knows about you :rofl:

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