metube conversion

[OliversDP]

"Hello, I currently have a problem. I can open the web interface, but when I try to convert a YouTube video, nothing happens. I tried disabling my Synology firewall, and then it worked. However, port 5992 is correctly authorized by the firewall. It seems that during the conversion, the firewall is blocking another port besides 5992. Can you help me, please?

my rules firewall

[PikuZheng]

I don't think so.
For inbound, metube only needs the webui port (tcp/8081 by default). and 5992 is not needed.
For outbound (inside container -> internet), yt-dlp uses random ports to connect to the video site, and the dns server.

[OliversDP]

"It may be those random ports that the firewall is blocking because if I set the firewall to ALL ALL ALLOWED, it works, but for security, it's not ideal.

"I don't know which rule could fix this.