[Bug 215923] New: Nested KVM Networking issue

[Bug 215923] New: Nested KVM Networking issue

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=215923

            Bug ID: 215923
           Summary: Nested KVM Networking issue
           Product: Virtualization
           Version: unspecified
    Kernel Version: 5.13.0.40
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: kvm
          Assignee: virtualization_kvm@kernel-bugs.osdl.org
          Reporter: mobilebackup95@gmail.com
        Regression: No

Hi, 

Inside openstack i have an instance of Ubuntu 20.04 and i have installed KVM (
using virt-manager ) to setup a Virtual Machine ... i have done that and i
created a VM of ubuntu 20.04 inside the Openstack Instance but there are
networking issue while i set the default parameter as setting up the VM ( i
mean the networking is as default to NAT ) , So when the VM is up and running
the PING to 8.8.8.8 is available and also ping to google.com is also valid
which shows that the DNS is correctly working ... but there is not connectivity
with packages while i do sudo apt update, it will not get any package update
and also the wget to google.com is shows that its connected to it but it wont
able to download!!! the same happen with curl to any other websites...


I'm confirming that the openstack instance has full access to the internet
including ping and wget , .... but the VM is not working correctly!

P.S. I have set the ip forwarding, Iptables , ... also disabled firewals but
notting changed!!


Would you please fix this ?

Thanks
Best regards

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