QEMU Windows 11 guest cannot access internet
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Description
Happy new year 🙂
I have migrated a VM to a fresh CachyOS installation but it could not access the internet.
Setting `firewall_backend = "iptables"` in `/etc/libvirt/network.conf` fixed it. Maybe this could be added to [QEMU and VMM Setup](https://wiki.cachyos.org/virtualization/qemu_and_vmm_setup/) or made a default config.
My VM network configuration differs from the default:
```XML
```
I think I did this because it is supposed to improve performance. Maybe this tweak is only needed for such a network interface. But I'm no expert on QEMU.
Contributor guide
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Research direction
Start with the QEMU and VMM Setup page and review the `/etc/libvirt/network.conf` setting `firewall_backend = "iptables"`. Check whether the setting applies to the reported network interface configuration or more broadly, then document the confirmed behavior and configuration guidance. Done means the page clearly explains when this setting is needed, or the issue is resolved with a justified default configuration.
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Assessment
- Tech stack
- linux
- Domain
- documentation
- Issue type
- Documentation
- Difficulty
- 2/5
- Estimated time
- 1-3 hours
- Activity status
- Active
- Clarity
- Mostly clear
- Newbie friendliness
- 68/100