Show iptables, ebtables etc rules created by libvirt

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I'm using libvirt with qemu on a ubuntu bionic system. I'd like to inspect what network filtering rules are actually created in the system for the nwfilter rules when I run a qemu/kvm guest with libvirt. I created a a very basic testing rule like this and attached to my domain's only nic:



<filter name='test' chain='root'>
 <rule action='drop' direction='out' priority='-650'>
 <ip dstipaddr='8.8.8.8'/>
 </rule>
</filter>

<interface type='bridge'>
 <source bridge='bridge0'/>
 <mac address='00:16:3e:1a:b3:4a'/>
 <model type='virtio'/>
 <filterref filter='test'/>
</interface>


The filter is working as expected, as I can easily test from within the VM. However using iptables -L -n, ebtables -L or even nft list chain inet filter output on the host is not showing any rules.



I suspect the rules might get created in a different network namespace? And ultimately how to view them?






libvirtd netfilter







share|improve this question






















  • Remember, there are different tables involved, which can be accesed with the -t flag. So iptables -t nat -L will show the NAT table. Options may include nat, mangle, filter (the default), security and raw. You may also need some -v flags to show interface names to help distinguish what rules apply

    – Stephen Harris
    Dec 30 '18 at 14:58
















0















I'm using libvirt with qemu on a ubuntu bionic system. I'd like to inspect what network filtering rules are actually created in the system for the nwfilter rules when I run a qemu/kvm guest with libvirt. I created a a very basic testing rule like this and attached to my domain's only nic:



<filter name='test' chain='root'>
 <rule action='drop' direction='out' priority='-650'>
 <ip dstipaddr='8.8.8.8'/>
 </rule>
</filter>

<interface type='bridge'>
 <source bridge='bridge0'/>
 <mac address='00:16:3e:1a:b3:4a'/>
 <model type='virtio'/>
 <filterref filter='test'/>
</interface>


The filter is working as expected, as I can easily test from within the VM. However using iptables -L -n, ebtables -L or even nft list chain inet filter output on the host is not showing any rules.



I suspect the rules might get created in a different network namespace? And ultimately how to view them?






libvirtd netfilter







share|improve this question






















  • Remember, there are different tables involved, which can be accesed with the -t flag. So iptables -t nat -L will show the NAT table. Options may include nat, mangle, filter (the default), security and raw. You may also need some -v flags to show interface names to help distinguish what rules apply

    – Stephen Harris
    Dec 30 '18 at 14:58














0












0








0








I'm using libvirt with qemu on a ubuntu bionic system. I'd like to inspect what network filtering rules are actually created in the system for the nwfilter rules when I run a qemu/kvm guest with libvirt. I created a a very basic testing rule like this and attached to my domain's only nic:



<filter name='test' chain='root'>
 <rule action='drop' direction='out' priority='-650'>
 <ip dstipaddr='8.8.8.8'/>
 </rule>
</filter>

<interface type='bridge'>
 <source bridge='bridge0'/>
 <mac address='00:16:3e:1a:b3:4a'/>
 <model type='virtio'/>
 <filterref filter='test'/>
</interface>


The filter is working as expected, as I can easily test from within the VM. However using iptables -L -n, ebtables -L or even nft list chain inet filter output on the host is not showing any rules.



I suspect the rules might get created in a different network namespace? And ultimately how to view them?






libvirtd netfilter







share|improve this question














I'm using libvirt with qemu on a ubuntu bionic system. I'd like to inspect what network filtering rules are actually created in the system for the nwfilter rules when I run a qemu/kvm guest with libvirt. I created a a very basic testing rule like this and attached to my domain's only nic:



<filter name='test' chain='root'>
 <rule action='drop' direction='out' priority='-650'>
 <ip dstipaddr='8.8.8.8'/>
 </rule>
</filter>

<interface type='bridge'>
 <source bridge='bridge0'/>
 <mac address='00:16:3e:1a:b3:4a'/>
 <model type='virtio'/>
 <filterref filter='test'/>
</interface>


The filter is working as expected, as I can easily test from within the VM. However using iptables -L -n, ebtables -L or even nft list chain inet filter output on the host is not showing any rules.



I suspect the rules might get created in a different network namespace? And ultimately how to view them?






libvirtd netfilter




libvirtd netfilter






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Dec 30 '18 at 8:21









guckigucki

1012




1012












  • Remember, there are different tables involved, which can be accesed with the -t flag. So iptables -t nat -L will show the NAT table. Options may include nat, mangle, filter (the default), security and raw. You may also need some -v flags to show interface names to help distinguish what rules apply

    – Stephen Harris
    Dec 30 '18 at 14:58


















  • Remember, there are different tables involved, which can be accesed with the -t flag. So iptables -t nat -L will show the NAT table. Options may include nat, mangle, filter (the default), security and raw. You may also need some -v flags to show interface names to help distinguish what rules apply

    – Stephen Harris
    Dec 30 '18 at 14:58

















Remember, there are different tables involved, which can be accesed with the -t flag. So iptables -t nat -L will show the NAT table. Options may include nat, mangle, filter (the default), security and raw. You may also need some -v flags to show interface names to help distinguish what rules apply

– Stephen Harris
Dec 30 '18 at 14:58






Remember, there are different tables involved, which can be accesed with the -t flag. So iptables -t nat -L will show the NAT table. Options may include nat, mangle, filter (the default), security and raw. You may also need some -v flags to show interface names to help distinguish what rules apply

– Stephen Harris
Dec 30 '18 at 14:58











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