<IfModule mod_alias.c>
    Alias /.well-known/acme-challenge /var/www/letsencrypt/challenges/

    <Directory "/var/www/letsencrypt/challenges/">
        Options -Indexes
    </Directory>
</IfModule>

<IfModule mod_rewrite.c>
    #Redirect before other rewrite rules
    RewriteCond %{REQUEST_URI} /.well-known/acme-challenge/
    RewriteRule (.*) /.well-known/acme-challenge/$1 [L,QSA]
</IfModule>

<IfModule mod_alias.c>
    <VirtualHost f.haeder.net:80>
        ServerName f.haeder.net
        ServerAlias f.haeder.net
        RedirectMatch permanent ^(?!/.well-known/acme-challenge/).* https://f.haeder.net/
    </VirtualHost>
</IfModule>