When building a website with Cloudflare, you must choose a VPS node in the western United States.

Provided by netizen Brother Abiao

After several days of observation, we came to the following conclusions: 1. During the day, the Anycast IP of CF is usually dialed to the nearest node in Japan, Hong Kong, and Singapore. 2. During the evening peak, the Anycast IP of CF is always dialed to the LAX node. (At least this is the case for Beijing Unicom and China Telecom) How to check the CF node currently serving you: https://domain name of the station with CF/cdn-cgi/trace, for example: https://v2ex.com/cdn-cgi/ trace, https://VirMach.com/cdn-cgi/trace to see colo=LAX in the returned content. This colo represents the node between the current CF service and your IP. This node uses the airport code. Note: View Don’t open Tomato when using this address. Imagine what it is like to use Maozi’s VPS to build a CF website. The problem with static resources is not big. Anyway, the CF node is returned directly. But what about your dynamic request? First go to Los Angeles from China, and then go around from Los Angeles. I went back to Russia, Germany, and the Netherlands, and after getting the dynamic return data, I circled back to Los Angeles from these European countries, and then circled back to China from Los Angeles, haha, the data packets traveled around the world, trembling MJJ, it is really shocking. The conclusion is: For sites serving Chinese customers, when building a CF website, your VPS must choose a node in the West because of night CF. Chinese customers will always be dialed to the LAX node in the US West. Your VPS must be as close as possible to CF's service node. Note 1: Dear MJJs, don't pay too much attention to whether the node CF dials for you is Hong Kong, Singapore or Taiwan. , What should be paid attention to is the distance between your origin site and your CF node, because all dynamic requests must be returned to the origin. This is the key point, unless your CF only has a separate static resource second-level domain name or an independent Static resource domain name. You can imagine that all three lines dial you to Hong Kong, but if you use a British or Dutch origin site, the dynamic request back to the origin has to go around half the world... Note 2: The dynamic request back to origin and service are different from your static The resource CF nodes are not the same, but they also follow the principle of proximity in CF. https://www.cloudflare.com/ips-v4 is the return-to-origin IP address segment, which is generally added to the origin site firewall rules. , but these IPs are also Anycast IPs. The entire network of CF is built on the basis of Anycast IPs. In theory, these return-to-source IPs also follow the principle of proximity, so the difference is not very big. During the evening peak hours in mainland China, CF has always They all think that LAX is the closest from the BGP perspective.

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