My ISP suddenly started blocking my DNS (I was using google 8.8.8.8 DNS and 1.1.1.1)
I could ping to 8.8.8.8 or 1.1.1.1, but no access to DNS service.
I could not ping to any web address.
I was able to get yo youtube's webpage but without any video or image. That was the only website on all of internet that I could access, and I suspect that it was because Firefox cached some DNS data.
When I configure the WiFi adapter's TCP4 properties to use automatic DNS, then all works fine, but when I specify my preferred DNS servers, it all stop working.
I have Firefox to use encrypted DNS over https using Cloudfare, but it only works when the DNS server is setup to automatic on the network adapter.
I do not want my ISP having any say on the DNS I choose.
The ISP is evil, sometimes redirects my web pages, and also replaces ads, so I frequently get complain from web pages that I'm not supporting them by using an ad block, which is not true.