SSL auto-renewal failing on redirected domains

Hi all,

My company has a Forge server only used for domain redirections. In Forge interface, it means that sites on this server don’t host any app, but are only filled with one redirect ( / to https://otherdomain.tld).

When comes the time for Let’s Encrypt auto-renewal (to renew the redirected domain certificate), the process fails as Let’s Encrypt bot is trying to query a URL ( .well-known/blabla ) that ends up being redirected like the whole domain.

So… I don’t know if it’s a feature not supported by Forge or if the problem lies somewhere else.

I think the following Nginx settings are loaded (not sure of the order, however):

In before/ssl_redirect.conf:

# Redirect every request to HTTPS...
server {
    listen 80;
    listen [::]:80;

    server_name .MYDNS.TLD.be;
    return 301 https://$host$request_uri;
}

In mytld.conf

# FORGE CONFIG (DO NOT REMOVE!)
include forge-conf/MYDNS.TLD./before/*;

server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name MYDNS.TLD.;
    root /home/forge/MYDNS.TLD./;

    # FORGE SSL (DO NOT REMOVE!)
    ssl_certificate /etc/nginx/ssl/MYDNS.TLD./540731/server.crt;
    ssl_certificate_key /etc/nginx/ssl/MYDNS.TLD./540731/server.key;

    ssl_protocols TLSv1.2;
    ssl_ciphers ECDHE-RSA-AES256-GCM-SHA512:DHE-RSA-AES256-GCM-SHA512:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-SHA384;
    ssl_prefer_server_ciphers on;
    ssl_dhparam /etc/nginx/dhparams.pem;

    add_header X-Frame-Options "SAMEORIGIN";
    add_header X-XSS-Protection "1; mode=block";
    add_header X-Content-Type-Options "nosniff";

    index index.html index.htm index.php;

    charset utf-8;

    # FORGE CONFIG (DO NOT REMOVE!)
    include forge-conf/MYDNS.TLD./server/*;

    location / {
        try_files $uri $uri/ /index.php?$query_string;
    }

    location = /favicon.ico { access_log off; log_not_found off; }
    location = /robots.txt  { access_log off; log_not_found off; }

    access_log off;
    error_log  /var/log/nginx/MYDNS.TLD.-error.log error;

    error_page 404 /index.php;

    location ~ \.php$ {
        fastcgi_split_path_info ^(.+\.php)(/.+)$;
        fastcgi_pass unix:/var/run/php/php7.3-fpm.sock;
        fastcgi_index index.php;
        include fastcgi_params;
    }

    location ~ /\.(?!well-known).* {
        deny all;
    }
}

# FORGE CONFIG (DO NOT REMOVE!)
include forge-conf/MYDNS.TLD./after/*;

In server/redirect_rules.conf:

# Laravel Forge Redirect Rule 26978
rewrite / https://MYTARGETDNS.TLD redirect;

In server/letsencrypt_challenge.com:

location /.well-known/acme-challenge {
auth_basic off;
allow all;
alias /home/forge/.letsencrypt;
}

Also, my Nginx abilities are limited (front-end developer, here).