WARP breaks KVM/libvirt networking on Linux (Virt-manager)

With Warp enabled, networking the VMs (QEMU, virt-manager) doesn’t work. Anyone has idea to solve this?
OS: Fedora Workstation (Linux)
Warp Version: 2023.7.22

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Updated the latest warp-cli 2023.7.40. But the problem still persists, disabling and enabling the warp, resove the network issues, it’s very annoying.

Encountered the same issue. Also found another post complaining about it.

My environment:

  • Operating System: openSUSE Tumbleweed 20230707
  • Kernel Version: 6.3.9-1-default (64-bit)
  • libvirt: 9.4.0
  • virt-manager: 4.1.0

Update: problem still exists. Also, besides KVM networking, I found it affects docker image building.

Environment:
OS: openSUSE Tumbleweed 20231006
warp-cli 2023.9.301

I have noticed a problem with docker on Linux in WARP, so I configured MTU with virsh and it worked for me, I wonder if this will work for you as well.

<network connections="1">
  <name>default</name>
  <uuid>...</uuid>
  <forward mode="nat">
    <nat>
      <port start="1024" end="65535"/>
    </nat>
  </forward>
  <bridge name="virbr0" stp="on" delay="0"/>
  <mtu size="1420"/> <!-- Add this -->
  <mac address="..."/>
  <domain name="default"/>
  <ip ...>
</network>
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