You can reach the web UI from outside the VM.
You can reach the web UI from outside the VM.
You're facing issues because qBittorrent is running inside a Linux VM, which affects how network connections behave. It might be related to port forwarding or a proxy setup. The numbers you provided show the VM and host details, but the core problem is likely how traffic is routed between your local PC and the VM. Try configuring a port forward in your router or using a VPN client to bridge the gap between your home network and the VM.
Locate the IP address of the VM and update it to 20300. Ensure 127.0.0.1 is mapped there so your local machine appears as its IP. If qbittorrent isn't active, nothing should display. Your VPN might also block access.
You tried using a terminal in the VM with hostname -I and extracted the IP 10.0.2.15, then submitted it to qBit with 20300, but the problem persists.
The issue lies in your VM network being set to NAT in VirtualBox. You need to open the VM settings, switch the attached network card from NAT to a bridge adapter. This allows the VM to connect directly to your local network like a physical device and receive its own IP from your router or DHCP server. Restart the VM or reboot the network inside it to apply these changes. Alternatively, you can forward ports from your local machine to the VM’s IP address. This method doesn’t require modifying VM settings or QBittorrent configurations. If you encounter further issues after checking the "ip a" command output in Linux, please share the screen.