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by sulandor
660 days ago
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well, there is certainly a lot to be said for efficiently checking boxes. just wanted to point out that dns-level blocking introduces a discrepancy to a shared truth, which creates problems and is hence more costly than it might appear. |
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I have stuff that i can only access inside my home network, so here the truth is one.. Out in the internet those same addresses do not exist, so out there the truth is another..
This is also the same for most, if not all, enterprises, there is always stuff that can only be accessed either on the internal network or via VPN..
There are address that point to different endpoints depending on the network you are connected, and this is by design, again the network wide google safe search is an example.
Same thing for streaming services and CDN's, the same address will return a different endpoint depending on your location..
This happen even for direct IP address without using DNS, Quad9 for example have dozens of servers that provide service to the address 9.9.9.9 for their DNS Server, so depending on your location the same IP address will connect you to a different server that is located closer to you to ensure fast access.
DNS like anything in the network and in computing in general can cause problem if not done correctly.. But then the problem is how it was implemented not the dns blocking or redirecting functionalities on themselves..