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Mask Nginx version details from the HTTP Response Header.

nginx-server-version

In default NGINX configuration, the Server header banner isONwhich exposes what version of Nginx you are using.

This is considered as information leakagevulnerability.

As you could see, no more version is shown.

I hope this helps and if you are looking to learn Nginx then check out thiscourse by Ray Viljoen.