I've very serious issue with my system or network, some of the websites doesn't open and it's just displaying server DNS address could not be found
I've tried to change DNS settings with Google public DNS:
Preferred DNS server : 8.8.8.8
Alternate DNS server : 8.8.4.4
And with open DNS:
Preferred DNS server : 208.67.222.222
Alternate DNS server : 208.67.220.220
Also tried with following commands:
ipconfig /flushdns
ipconfig /registerdns
ipconfig /release
ipconfig /renew
NETSH winsock reset catalog
NETSH int ipv4 reset reset.log
NETSH int ipv6 reset reset.log
And lot more things. But could not find solution any! I've also refereed :
“DNS server address couldn't be found” for some websites
Site can't be reached- server DNS address could not be found
But no luck so far, can anyone let me know, what is the issue and how can I resolve it?
Updated:
Sites are not working on my system are:
https://cdnjs.cloudflare.com/ajax/libs/remarkable/1.7.1/remarkable.min.js
https://cdnjs.cloudflare.com/ajax/libs/react/15.3.2/react-dom.js
https://cdnjs.cloudflare.com/ajax/libs/react/15.3.2/react.js
https://cdnjs.cloudflare.com/ajax/libs/babel-core/5.8.23/browser.min.js
I've checked with my another system which has fresh OS installed, and this all sites are working perfectly on it.
Moreover, I've checked wit uninstall my antivirus, but It couldn't solve my issue.