Does any Hong Kong website server use the free CloudFlare free CDN service, is the domain name polluted by DNS?

As in the title, I see that the website server of a website is in the United States. Using CloudFlare’s free CDN (NS server for modifying domain names), the domain name of this website is polluted by DNS. Would it also be possible if the website server is in Hong Kong?

First of all thank you for your reply, but what I want to ask is the problem of DNS pollution

@sdayman Do you mean that if the website uses Cloudflare’s free CDN, it is possible not to return the US IP, but can it return to the Chinese IP?

The entire IP address range use by Cloudflare ASN 13335 belongs to United States because this is where they registered their IP addresses. They don’t own any IP address range in other countries.

Once you proxy, you will always get Cloudflare IP address in which all the IP lookup databases will return United States as the source of the IP address.

But, this does not mean that your traffic will be always routed to United States data center. Every data center shares the same IP address, no matter which country the server is located.

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Thank you for your reply. Is there a way to “designate” Hong Kong nodes using CloudFlare’s free CDN?

No, you never have the option to “force” route the traffic to a specific node. The whole network is built based on Anycast technology, so the shortest path wins.

But FYI, there’s one point of presence (PoP) in Hong Kong, so typically Hong Kong users will be routed to this PoP.

Understand, what did you say: Every data center shares the same IP address, no matter which country the server is located–>Does it mean that each node of CloudFlare shares the “United States” IP?

Yes…

OK,Thanks,The conclusion is that CloudFlare can only return US IP, and DNS pollution in China

Not sure whether you misunderstood the term “DNS pollution”, as Cloudflare does need to work this way by proxying the requests and masking the server real IP address. It’s not an attack.

https://www.cloudflare.com/learning/dns/dns-cache-poisoning/

DNS cache poisoning is the act of entering false information into a DNS cache, so that DNS queries return an incorrect response and users are directed to the wrong websites.

DNS poisoning is basically the same as DNS pollution anyway.

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