similar to: Insert iptables rules with network hook

Hi everyone. Those are the iptables forwarding rules associated with the two virtual networks on my machine: ----------------------------------------------------------------------------------------- -A FORWARD -d 192.168.100.0/24 -o virbr1 -m state --state RELATED,ESTABLISHED -j ACCEPT -A FORWARD -s 192.168.100.0/24 -i virbr1 -j ACCEPT -A FORWARD -i virbr1 -o virbr1 -j ACCEPT -A FORWARD -o

On 8/17/20 5:15 AM, Gunnar Niels wrote: > Hello, I have a set of iptables rules that I need to insert *after* libvirt > has set up all of its firewall rules. Is there a hook that I can tap > into in > order to run something like a custom script to make sure this happens? > Any ideas? > > -GN > You should be able to use a libvirt network hook script to do this:

Hello, I have a set of iptables rules that I need to insert *after* libvirt has set up all of its firewall rules. Is there a hook that I can tap into in order to run something like a custom script to make sure this happens? Any ideas? -GN

Hi, I have some guests running in the "default" network (virbr0) and I've also created a similar (NAT) network (virbr1). Therefore, the FORWARD chain for the CentOS 6.4 host looks like this: http://fpaste.org/29229/75281379/ ...where line 3-7 are related to virbr0 and 8-12 to virbr1. My 2 questions: 1) I've noticed that I can ping from a guest within virbr0 to any guest on

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

Running CentOS 6 I have noticed that Libvirt will automatically configure IPtables once a VM is using the built in NAT , or "default" network. How do I modify the IPtable rules without breaking libvirt's ability to configure these rules? This is the firewall settings on a fresh install with no VMs using virbr0... -------------------------- Table: filter Chain INPUT (policy ACCEPT)

Hi all, I have installed a CentOS 5.3 x86_64 server with kvm and libvirt to do some tests for future virtualized deployments. My environment: eth0 --> 172.25.50.1/24 ("public" host ip) virbr0 ---> 192.168.122.1/24 (natted interface installed by libvirt) virbr1 ---> 172.26.50.0/24 (internal virtualized network, whithout physical interface binded) Between

On 06/20/2017 05:27 AM, Martin Kletzander wrote: > On Tue, Jun 20, 2017 at 10:05:19AM +0200, Martin Kletzander wrote: >> On Tue, Jun 20, 2017 at 02:26:59AM -0400, Travis S. Johnson wrote: >>> Hello, >>> >>> I came across an interesting problem in my home lab a few weeks ago >>> as I'm >>> prepping for my RHCE exam using Michael Jang study

At work I have a script that provisions a vm for use by employees. One step in this process is to fetch hadoop, which we happen to get from cloudera. I noticed the script always failed when I used libvirt's default networking (nat) but worked fine when I used user mode networking. My instinct is that this is related to (potentially uncommon) network traffic from the server in question, and

On Tue, Jun 20, 2017 at 02:26:59AM -0400, Travis S. Johnson wrote: >Hello, > >I came across an interesting problem in my home lab a few weeks ago as I'm >prepping for my RHCE exam using Michael Jang study guide. I've been at this >for days now, and I still can't wrap my head around how two or more virtual >networks in default NAT configuration are even allowed to

On Tue, Jun 20, 2017 at 10:05:19AM +0200, Martin Kletzander wrote: >On Tue, Jun 20, 2017 at 02:26:59AM -0400, Travis S. Johnson wrote: >>Hello, >> >>I came across an interesting problem in my home lab a few weeks ago as I'm >>prepping for my RHCE exam using Michael Jang study guide. I've been at this >>for days now, and I still can't wrap my head around

Hello, I came across an interesting problem in my home lab a few weeks ago as I'm prepping for my RHCE exam using Michael Jang study guide. I've been at this for days now, and I still can't wrap my head around how two or more virtual networks in default NAT configuration are even allowed to communicate with each other despite what the libvirt documentation said. Here's the

OK I rebooted. I changed the NIC from Bridge to Passthrough, hit apply, then changed it to bridge and hit apply, then booted the VM. My firewall looks better but still not working. iptables -L FORWARD -v -n | egrep '(policy|virbr1)' Chain FORWARD (policy ACCEPT 0 packets, 0 bytes) 0 0 ACCEPT all -- eth0 virbr1 0.0.0.0/0 192.168.100.0/24 ctstate RELATED,ESTABLISHED

Dear libvirt users, I am encountering problems with network connections from VMs while running net-update on the host. I would be very grateful for suggestions of fixes or workarounds. I am using libvirt in the context of an automated test system which creates and destroys VMs fairly rapidly, hence network updates occur often. ## Reproducer The issue can be reproduced as follows. Run in a VM:

Hi Team , I am reaching out to you seeking your help for one of my KVM hook script. I am using /etc/libvirt/hooks/network file to trigger an event when a network is created or deleted ( https://www.libvirt.org/hooks.html ). Basically I using a rest call to create the same network in my Infoblox appliance for the network monitoring. However every time I create a network only $2== start or

On 12/16/2013 04:47 AM, Gao feng wrote: > On 12/14/2013 10:51 AM, scar wrote: >> -----BEGIN PGP SIGNED MESSAGE----- >> Hash: SHA256 >> >> Gao feng @ 12/12/2013 10:18 PM: >>> I saw there are two bridge br0 and virbr0 in your host. which >>> bridge the libvirt uses? what's result of #virsh net-list ? >> well i don't quite understand bridges

Hi all, my dom0 is centos5.2 and domU paravirtualized is centos5.1 I can play sound on dom0 but not in domU (name: gasphar), moreover I use wifi as my inet connection and on installing domU cento5.1, I used virt-manager. I know that libvirtd made virbr0 and when changing to xenbr0, I cannot connect to internet but ssh to dom0 is fine! so how do I enable sound device on domU and changing to

I am running Fedora 16 64bit and installed libvirt. I have the VM running with arm emulation with this one issue I can't figure out. I used Virtual Machine Manager to manage the VM and can access its console there. The Ethernet appears to be eth1 and the guest can set an IP on it etc. However, I cannot see any traffic from the Host when dumping any of the interfaces. I've tried

On Wed, Aug 29, 2018 at 06:31:41PM -0400, Rhys Ferris wrote: >Hello all, > >I’m currently trying to figure out how to forward ports to guests that are on a NAT Network. I have followed the directions on https://wiki.libvirt.org/page/Networking under the “Forwarding Incoming Connections” Section and get connection refused when attempting to connect. > >System: Ubuntu Server 18.04.1

Hello, I'm a little confused on which networking option I need to choose when setting up a VM. I set up two VMs this past weekend both with NAT. Both able to were access the internet. The first one, I created in my / file system but didn't really have the space so I deleted it. The second one, I created in /home/kvm, but deleted it as well when I couldn't access it FROM the