similar to: how to setup network filter

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,

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

Hi, Over the past few days I've been trying to get a prototype working of a stateful firewall for a Virtual Machine using Libvirt's network filters. My goal is to replace the current custom Python/Java code in the Apache CloudStack [0] project by Network Filters of Libvirt. Both IPv4 and IPv6 should work, but I started off with IPv4 and I have issues with accepting back

I have the need to modify the behavior of the virtual network driver's behavior and how it deals with routed networks. I'm running libvirt-0.8.3-2.fc14. According to http://libvirt.org/firewall.html, the following is automatically added to the FORWARD chain of iptables when a network type of "routed" is started up: "Allow inbound, but only to our expected subnet.

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

On 02/14/2014 08:40 PM, h0rst wrote: > Hello! > > Since i could not find any information on the internet about this subject, i'm going to try my luck on this list. > > I'm trying to setup network-filter on a routed setup. I have a root-server at Hetzner, a german hosting provider. > Along with my server i ordered a (/28) subnet to be able to setup dedicated IPs for my

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

Hi, I'm running OpenStack on CentOS 6.3 to manage lxc instances. And running into series of problem relating libvirt and lxc interaction. For example, libvirt_lxc segfault ( https://bugzilla.redhat.com/show_bug.cgi?id=874549) which has an upstream fix. And another bugs such as fail to start when SELinux disabled. Finally, I decides to adopt libvirt 0.10.2, self compiled from

Hello All, I am trying to set up a cobbler server running as a guest on an isolated network. I'm having trouble figuring out how I can forward the DHCP and DNS traffic to this guest instead of DNSMASQ on the host. So far I have only tried to get dhcp working by enabling the 'allow-dhcp-server' on a guest named test and setting the $DHCPSERVER variable through a filterref parameter

Hello! Since i could not find any information on the internet about this subject, i'm going to try my luck on this list. I'm trying to setup network-filter on a routed setup. I have a root-server at Hetzner, a german hosting provider. Along with my server i ordered a (/28) subnet to be able to setup dedicated IPs for my virtual machines (KVM). My Server is running Ubuntu 12.04 with

Hi all, I've got a problem with nwfilters/iptables. For one of my guest's interfaces, I have established the following filter: --8<---------------cut here---------------start------------->8--- <filter name='p-mgmt' chain='root'> <uuid>94fdd15b-b380-ba8c-6685-91206829adc7</uuid> <filterref filter='clean-traffic'/> <rule

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

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

Can someone provide some guidance with my server, I have a fairly new centos 8 server, pretty much just a KVM host but I have noticed that its dumping and rebooting at various times. Journalctl does not go back past the reboot so I am unable to catch what may be causing it, it appears to be KVM from /var/log/messages and it appears I should have a kernel dump file but I am unable to find it. I

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 there. I have configured kvm domain (rhel6.4) with ethernet bridged over macvtap, and found no filtration applied except mac. 'virsh' just silently ignoring attributes 'filterref' and 'ip address' in different formats. No error on validate stage. Config examples: ... <interface type='direct'> <mac address='52:54:00:31:ae:1a'/>

Hi I am using libvirt (0.9.12) with openstack and xen. It looks like libvirt is not creating ebtables rules against arp spoofing etc. Here are my configs: VM definition: <domain type='xen'> <uuid>d49b777f-32f1-4093-ae47-a12efd0efd2c</uuid> <name>instance-00000168</name> <memory>2097152</memory> <os>

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'

On Thu, Jun 28, 2018 at 10:18:57AM +0200, Ales Musil wrote: > 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].

To take advantage of the filters, is it as simple as adding these couple of lines in a guest's xml file like the example from https://libvirt.org/formatnwfilter.html#nwfconcepts ? <devices> <interface type='bridge'> <mac address='00:16:3e:5d:c7:9e'/> <filterref filter='clean-traffic'> <parameter name='IP'