What is the name of the domain?
What is the issue you’re encountering
inital connection very long time, take 21 seconds
What are the steps to reproduce the issue?
Approximately every hour, when accessing a URL through a browser, the initial connection takes about 21 seconds. This delay is not related to DNS resolution.
I have investigated and found that during these 21 seconds, the request does not reach my server at all. It only arrives at the 21st second, and then my server responds in less than a second.