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A8DOG

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Avoiding Pitfalls in Building Your Own CDN

Recently, I found that the server logs had more 502 status codes than 200. I think it may be because I have blocked a large number of spiders and non-browser accesses.

Then today, during the testing phase of adding a new node, I found that the CDN service was in an abnormal state. After investigation, I discovered that the firewall had blocked the server IP and the non-browser interception of the Baota firewall.

Since my IP has always been in the firewall whitelist, I didn't notice it.

  1. Add the server IP to the firewall whitelist.

  2. Disable the non-browser interception of the Baota firewall.

  3. Check the ping latency between the node server and the origin server.

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