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AFAIK: .......
Since PM6 Najib's era (2009- ), the ISPs have been doing DNS blocking/filtering and DNS hijacking. How.?
By default, Internet subscribers use the DNS servers provided by the ISPs to find the IP address of the website they intend to visit. When the ISP (as instructed by the government) wishes to block a website from their subscribers, the IP address of that blocked website is filtered/blocked by the ISP's DNS server.
....... This DNS blocking/filtering can be bypassed by the subscriber manually selecting a Private DNS server in his/her OS Settings or Router Settings, eg Google8888, Cloudflare1111, AdguardDNS, OpenDNS, Comodo, Level3, AlternateDNS, etc.
....... The ISP can then stop this bypass method by doing DNS hijacking of the popular Private DNS servers, eg Google8888, Cloudflare1111 and AdguardDNS. MCMC called this DNS redirection(sic), not DNS hijacking. Less popular Private DNS servers were not hijacked. This was put into effect for all the ISPs by MCMC in early Aug 2024.
Again, this DNS hijacking can be bypassed by the subscriber manually selecting (encrypted) Secure DNS or DoH (DNS over HTTPS) in his/her browser Settings or by him/her manually selecting DoH or DoT or etc in his/her Router Settings.
So, on 4 Sep 2024, TM Unifi Fibre stopped this Secure DoH/DoT bypass method by doing IP blocking/hijacking (or BGP hijacking.?) of the popular Private DNS servers, eg hijacking the IP addresses of Google8888, Cloudflare1111, Quad9999, AdguardDNS, etc.. This affected many professional workers and businesses who were unable to connect to the Internet or www, unless they or their IT Admins have manually changed their Secure DoH or DoT servers to the less popular Private DNS servers, eg NextDNS, ControlD, etc, or were using a VPN or Proxy-server.
....... Hence, after some pushback, on 10:10pm, Friday, 6 Sep, MCMC instructed TM and the other ISPs to stop their IP blocking/hijacking and DNS hijacking - temporarily.?.
Presently, it's back to before early Aug 2024, ie only DNS blocking/filtering on the ISP's DNS servers of "undesirable" websites is in place.
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Note that the ISPs can do further blocking with Deep Packet Inspection, spyware, keywords filtering, etc, ala the Great Firewall of China of the CCP. .......
https://en.wikipedia.org/wiki/Great_Firewall.
I see, so I have to open Chrome and find the secure DNS setting, enable it?
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My repost above fyi.
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