NPM (Nginx Proxy Manager) Reverse Proxy ARIA2's JSONRPC

aria2 is a lightweight multi-protocol & multi-source command-line download utility. It supports HTTP/HTTPS, FTP, SFTP, BitTorrent and Metalink.

The SSL certificate used by the Aria2 server does not support port 6800, so NPM (Nginx Proxy Manager) needs to be used to provide both HTTP(s) and Aria2 JSONRPC services.

Edit NPM (Nginx Proxy Manager)

Proxy Host >> Advanced

#ARIA2
    location /jsonrpc {
        proxy_pass http://10.2.2.3:6800/jsonrpc;
        proxy_redirect off;
        proxy_set_header        X-Real-IP       $remote_addr;
        proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Host $host;
    #The following code supports WebSocket
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }

Final Result:

You can now connect to ARIA2 RPC via "https" and "wss" (WebSocket Secure).

Reference:

• Nginx reverse proxy Aria2 JSONRPC | Kenvix's Blog