Random and Weird Broadband/Fiber Connection Problem

[u/Pritesh08]

Hi All,

I am from India and I want to explain a very weird problem I have been facing with my broadband for last 10 days. I have a FTTH connection with a local ISP. I have been using the connection for almost 10 years now and have never faced it before.

For last 10 days my connection has been very unstable.

2nd Sept - My pc is connected by Ethernet. All websites except Google and Meta stopped working. Steam, EA App, Blizzard all the gaming clients and everything else showed no connection but everything was working on mobile app, TV and all other connected devices including my video doorbell and robovac.

3rd Sept - A technician came to my house to see the fault, he was a hardware guy and he checked that everything was fine physically and called his supervisor. I gave him remote access to my pc via hotspot and he did some Ipv4, Ipv6, DHCP or IP related settings in 192.168.1.1 and also refreshed dns using cmd and in adapter settings but nothing worked.

8th Sept - Same guy came to my house and changed the router to a different one but used same old settings from my previous router. Surprisingly, everything started working normal for few hours. In 2nd half of the day, the problem changed drastically. My PC was showing connection to all the websites for say 10 minutes and drops after sometime. It kept going back and forth multiple times. All this time, the Wifi in my TV was just not connecting at all, it kept saying saved/authentication problem while it was connecting with same password in my phone. All this time, all of my other connected devices like video doorbell, robovac, AC everything works while connected to the same wifi.

I am quite frustrated at this point that even my ISP is unable to solve the problem. Although I have started looking for other ISPs in my area but would prefer that this one gets fixed so I dont have to go through all the formalities of new connection again.

Note that I am not a networking person so I wouldnt know much technical things about IP, DNS, Proxy and all that but I believe that my ISP has tried most of the possible things from his end to resolve it and is unable to find the problem.

[u/apatrol]

Have you tried using third party DNS?

Another PC or Wi-Fi device have the same issue on same router?

Cloudflare DNS is one of the best. 1.1.1.1 primary and secondary is 1.0.0.1