To interact with a Debian 13 machine remotely using virsh, you need to install the libvirt-daemon-system package. This package provides the libvirtd service, which is the server-side daemon that allows remote management of virtual machines via virsh or other libvirt-based tools.

Steps to Enable Remote Access:

1. Install the package:

   bash
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   sudo apt update
   sudo apt install libvirt-daemon-system

2. Configure libvirtd for remote access:

   • Edit the configuration file /etc/libvirt/libvirtd.conf to enable TCP/IP connections (uncomment and set listen_tcp = 1).
   • Ensure the auth_tcp setting is configured (e.g., auth_tcp = "none" for no authentication, or use SASL for secure authentication).

3. Restart the service:

   bash
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   sudo systemctl restart libvirtd

4. Open the firewall (if applicable): Allow the libvirt port (default: 16509/tcp) in your firewall.

5. Connect remotely: Use virsh from a client machine with:

   bash
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   virsh -c qemu+tcp://<server_ip>/system

Additional Notes:

• For secure connections, use qemu+tls:// instead of qemu+tcp:// and configure TLS certificates.
• If you only need local access, libvirt-daemon-system is still required, but no additional configuration is needed.