Refused to load the image behind ReverseProxy in Proxmox

[Fabi]

Hi,
I installed Passbold in a Proxmox container. The container runs behind a “Ngnix reverse proxy”.
I have installed “Passbold” according to the instructions for Ubuntu.

I have the following error:
The browser does not load CSS or image files and in the console you can find errors:

Refused to load the image '<URL>' because it violates the following Content Security Policy directive: "img-src 'self'".

In the Passbolt Continer I made no further changes.
In the ReverseProxy the site-available/default file is configured that way.

server {
    listen 80;
    listen 443 ssl;
    server_name passbolt.domain.de www.passbolt.domain.de

   # ssl on;
    ssl_certificate /etc/letsencrypt/live/domain.de/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/domain.de/privkey.pem;

    access_log /var/log/nginx/passbolt.access.log;
    error_log /var/log/nginx/passbolt.error.log;

    if ($scheme = http) {
            return 301 https://$host$request_uri;
    }

    location / {
            proxy_set_header X-Forwarded-Host $host;
            proxy_set_header X-Forwarded-Server $host;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_pass http://passbolt.domain.de/;
    }

The page looks like

Screenshot

A setup without CSS is also not possible, because the database cannot be accessed because of the error.

[garrett]

Hi @Fabi I would next look at the /etc/nginx/nginx.conf file in the reverse proxy for directives related to:

add_header Content-Security-Policy

[Fabi]

This is the nginx.conf
There is nothing about add_header.

user www-data;
worker_processes auto;
pid /run/nginx.pid;
include /etc/nginx/modules-enabled/*.conf;

events {
        worker_connections 768;
        # multi_accept on;
}

http {

        ##
        # Basic Settings
        ##

        sendfile on;
        tcp_nopush on;
        tcp_nodelay on;
        keepalive_timeout 65;
        types_hash_max_size 2048;
        # server_tokens off;

        server_names_hash_bucket_size 128;
        # server_name_in_redirect off;

        include /etc/nginx/mime.types;
        default_type application/octet-stream;

        ##
        # SSL Settings
        ##

        ssl_protocols TLSv1 TLSv1.1 TLSv1.2; # Dropping SSLv3, ref: POODLE
        ssl_prefer_server_ciphers on;

        ##
        # Logging Settings
        ##

        access_log /var/log/nginx/access.log;
        error_log /var/log/nginx/error.log;

        ##
        # Gzip Settings
        ##

        gzip on;

        #fastcgi_buffers_8 128k;
        #fastcgi_buffer_size 256k;

        fastcgi_buffers 8 128k;
        fastcgi_buffer_size 256k;

        # gzip_vary on;
        # gzip_proxied any;
        # gzip_comp_level 6;
        # gzip_buffers 16 8k;
        # gzip_http_version 1.1;
        # gzip_types text/plain text/css application/json application/javascript tex$

        ##
        # Virtual Host Configs
        ##

        include /etc/nginx/conf.d/*.conf;
        include /etc/nginx/sites-enabled/*;
}

What do I have to add.

[garrett]

@Fabi the reverse proxy 's proxy_pass line is typically an IP address. Try that instead.