Why is there a 404 error when the file is in the directory?

Question

Digital certificates

Hello!
Such a problem: I tried to get an ssl certificate for the site - for this I created two
.well-known folders in the root and acme-challenge in it and threw the file into the last one without specifying the extension.

When you try to check the file, you get a 404 error despite the fact that it is in the directory.
I tried to throw it in the directory above, i.e. in .-well-known , then it is visible.
What could be the problem please

Answer 1

1. Check the permissions on the acme-challenge folder, the webserver may not be allowed to read them. You need '-rx' for the user under which the web server (or its groups) is running.
2. The web server config must contain

Alias /.well-known/acme-challenge/ /u/www/virtual/letsencrypt/.well-known/acme-challenge/

and

<Directory "/ваш путь на сервере/.well-known/acme-challenge/">
    Options None
    AllowOverride None
    ForceType text/plain
    Order allow,deny
    Allow from all
    RedirectMatch 404 "^(?!/\.well-known/acme-challenge/[\w-]{43}$)"
</Directory>

3. your "file without extension" does not fall under the regular expression

RedirectMatch 404 "^(?!/\.well-known/acme-challenge/[\w-]{43}$)"

comment out this line and restart the webserver - the file should show up. But then uncomment it back, it's protection from "hackers".

Answer 2

# Пусть .weel-known лежит в папке /var/www/letsencrypt
    location /.well-known {
        allow           all;
        root            /var/www/letsencrypt;
    }