similar to: altering virtual network driver iptables behavior

Hi, I contact you as i have difficulties to use nwfilter with KVM host. I want to implemente flow filtering between my Linux guests. I created the following filter : cat admin-dmz-internet.xml <filter name='admin-dmz-internet'> <!-- this zone is an SSH ingoing only zone --> <!-- but SSH can go to an other SSH proxy --> <filterref

Nakta wrote: > libvirts nwfilter module can achieve that. I read over those resources and I did what I thought would be correct, but it's not having any effect. I created a new nwfilter like this: <filter name='allow-virbr2-vpn' chain='ipv4' priority='-700'> <rule action='accept' direction='in' priority='500'> <all

On Fri, Jun 29, 2018 at 3:40 AM Thiago Oliveira <cpv.thiago@gmail.com> wrote: > Hi Ales, > > I would like to prevent the guests from different subnets start a > communication. In other words I have the subnet 192.168.1.0/24 and > 192.168.2.0/24 and the guests from 192.168.1.0/24 cannot reach/talk with > guests on 192.168.2.0/24 at the same host. Is this possible using a

I just wrote this to assist some Red Hat folks understanding what libvirt does with iptables, and thought it is useful info for the whole libvirt community. When I have time I'll adjust this content so that it can fit into the website in relevant pages/places. Firewall / network filtering in libvirt ======================================= There are three pieces of libvirt

Hi folks, I'm using libvirt 3.9.0 running under CentOS 7.5. I want the guests, which are all within the same subnet (e.g. 10.0.0.x.), only talk to their default gateway (e.g. 10.0.0.1) but to each other. This is caused by a design issue of our network platform. I set up a filter rule and attached it to the interface of a guest using nwfilter-define: <filter name='private_ip'

Looking at https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/virtualization_deployment_and_administration_guide/sect-virtual_networking-applying_network_filtering#sect-Applying_network_filtering-Usage_of_variables_in_filters, it sounds like the preferred approach is to use something like: <filter name='no-ipv6-spoofing' chain='ipv6-ip'

Hello, I have a nwfilter that I'm using to ensure that libvirt domains can't spoof IPv6 traffic. It looks like this: <filter name='no-ipv6-spoofing' chain='ipv6-ip' priority='-710'> <rule action='return' direction='out' priority='500'> <ipv6 srcipaddr='$IPV6' srcipmask='$IPV6MASK'/> </rule>

Hi Sam, You can find the rules by below command, and it looks as below: # ebtables -t nat --list Bridge table: nat Bridge chain: PREROUTING, entries: 2, policy: ACCEPT -j PREROUTING_direct -i vnet0 -j libvirt-I-vnet0 Bridge chain: OUTPUT, entries: 1, policy: ACCEPT -j OUTPUT_direct Bridge chain: POSTROUTING, entries: 2, policy: ACCEPT -j POSTROUTING_direct -o vnet0 -j libvirt-O-vnet0 Bridge

Hi, I am trying to prevent my qemu guest machines from sending IPv6 router advertisements over their network device. To that end, I have written this filter definition: <filter name='no-ipv6-router-advertisement' chain='root' priority='-690'> <rule action='drop' direction='out' priority='600'> <icmpv6 type='134'/>

Hi All, I am new to libvirt and encounter a strange problem to set up network filter in a NAT network. I launched VMs in a single host using NAT, i.e. interface type='network'. Now I want to control the outbound traffic from VM instance - only allow the VM to asses a set of ip addresses. My network filter xml is as follows. The problem is once I change the VM xml, shutdown and start VM,

Dear Yalang, that did the trick. If I look in the NAT table of the bridge I can see the generated rules. Probably wouldn't have though about that ever. Thanks a lot! Best Sam On 29.12.18 06:51, Yalan Zhang wrote: > Hi Sam, > > You can find the rules by below command, and it looks as below: > # ebtables -t nat --list > Bridge table: nat > > Bridge chain: PREROUTING,

Hi, I'm trying to configure nwfilter for KVM, but so far I haven't managed to figure out a working configuration. Network setup: The dom0 (Debian 7.1, kernel 3.2.46-1, libvirt 0.9.12) is connected via eth0, part of the external subnet 192.168.17.0/24, and has an additional subnet 192.168.128.160/28 routed to its main address 192.168.17.125. The host's subnet is configured as bridge

Hi All, I am new to libvirt and encounter a strange problem to set up network filter in a NAT network. I launched VMs in a single host using NAT, i.e. interface type='network'. Now I want to control the outbound traffic from VM instance - only allow the VM to asses a set of ip addresses. My network filter xml is as follows. The problem is once I change the VM xml, shutdown and start VM,

I'm trying to apply a nwfilter rule for two networks on the same guest interface, like so: ~ # virsh nwfilter-dumpxml 1081532-private-both <filter name='1081532-private-both' chain='root'> <uuid>16004b94-2b62-4568-9467-169908eb4040</uuid> <rule action='accept' direction='in' priority='500'> <ip

Hello, I would like to make filter that allows communication only between specified VMs. Those VMs should be specified by their MAC address. The filter should extend clean-traffic but I was not able to get it working with that reference. I have came up with modified clean-traffic which works fine [1]. Is there a way to achieve the same behavior with reference to clean-traffic? Thank you. Best

Hi I am using Libvirt 1.1.2 with Openstack Havana (RC2, nova-network) and openvswitch 1.4.2+git20120612-9.1. Libvirt vif driver ( nova.virt.libvirt.vif.LibvirtGenericVIFDriver) generates config likes this: <interface type='bridge'> <mac address='fa:16:3e:44:30:a4'/> <source bridge='br0'/> <model type='virtio'/>

Hello, I'm recently stumbled over the libvirt network filter capabilities and got pretty excited. Unfortunately I'm not able to get the the "clean-traffic" filterset working. I'm using a freshly installed Debian Stretch with libvirt, qemu and KVM. My config snippet looks as follows: sudo virsh edit <VM> [...] <interface type='bridge'> <mac

Hi, Can anyone please help with the following: I have a running instance with interface <interface type='bridge'> <mac address='fa:16:3e:ba:a4:67'/> <source bridge='br100/> <target dev='vnet0'/> <model type='virtio'/> <filterref filter='nova-instance-instance-00000001-fa163ebaa467'/>

On 04/30/2014 05:01 PM, Oleg Bondarev wrote: > Hi, > > Can anyone please help with the following: I have a running instance > with interface > > <interface type='bridge'> > <mac address='fa:16:3e:ba:a4:67'/> > <source bridge='br100/> > <target dev='vnet0'/> > <model

On Wed, Oct 16, 2013 at 01:52:57PM +0200, Maciej Gałkiewicz wrote: > Hi > > I am using Libvirt 1.1.2 with Openstack Havana (RC2, nova-network) and > openvswitch 1.4.2+git20120612-9.1. Libvirt vif driver ( > nova.virt.libvirt.vif.LibvirtGenericVIFDriver) generates config likes this: > > <interface type='bridge'> > <mac