Allow clients from lan to acces plew behind reverseproxy without auth

[loc391]

Hello,
I’m trying to enable access from the lan without auth to the clients.

My lan is in 192.168.1.0/24. I have setup List of IP addresses and networks that are allowed without auth to 192.168.1.0/24
When hitting 192.168.1.50:32400/web, it works perfectly

However, I can’t do the same when using my reverse proxy. The name is films.omv.local.

All my services are configured with docker. And more precisely, my network for PMS is in 172.45.0.0/24.
The PMS ip is 172.45.0.2 and the bridge ip for plex is 172.45.0.1.

So therefore, by adding 172.0.0.0/8 to the list it should work. However it’s not working. I don’t understand why…

Here’s my ngnix config. I found it on reddit. (perhaps it could explain why) I’m not expert in reverse proxy there might be a big issue on my config :

server {
    listen 80;
    server_name films.omv.local;
    set $plex http://192.168.1.50:32400;
    gzip on;
    gzip_vary on;
    gzip_min_length 1000;
    gzip_proxied any;
    gzip_types text/plain text/css text/xml application/xml text/javascript application/x-javascript image/svg+xml;
    gzip_disable "MSIE [1-6]\.";

    # Forward real ip and host to Plex
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    #When using ngx_http_realip_module change $proxy_add_x_forwarded_for to '$http_x_forwarded_for,$realip_remote_addr'
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto $scheme;
    proxy_set_header Sec-WebSocket-Extensions $http_sec_websocket_extensions;
    proxy_set_header Sec-WebSocket-Key $http_sec_websocket_key;
    proxy_set_header Sec-WebSocket-Version $http_sec_websocket_version;

    # Websockets
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "Upgrade";

    # Buffering off send to the client as soon as the data is received from Plex.
    proxy_redirect off;
    proxy_buffering off;

    location / {
        proxy_pass $plex;
    }                
}

Do you have any ideas why it’s not working ? Or how I could debug this.

Thanks