similar to: Network update disrupts network usage

On Wed, Sep 09, 2020 at 06:31:41PM +0200, Joel Colledge wrote: > ## Conclusion > > The underlying problem seems to be that net-update removes and > re-creates the iptables rules, even when it makes no changes to them. > The best fix would be to correct that. > > Has anyone else encountered this situation? Is there any more > information I should provide to help with

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

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

If I have a linux kernel on dom0 from xen 3.0.2 and my xen binary is version 3.1.0, can I expect things to work? What about if my dom0 kernel and xen binary are both 3.1.0 and I have a para virt domU with xen 3.0.2 code in? What about if the tools are from a different version of xen? I''m asking because I''m running fedora 6 and I''d like to try out xen 3.1.0 or 3.0.4

Changeset 10742:3e07ec30c445 made it possible to switch to the QEMU monitor terminal when using the VNC display protocol. Unfortunately the VNC key handling is rather crazy, so even if you have the shift key pressed, a VNC client will send a lowercase letter, expecting the server to interpret the state of the shift key as desired. Normally in HVM guests, the guest OS does this interpretation

Hello, Recently I ran yum update on a RHEL5 x86_64 machine and as part of the update, the following packages were installed: Updated: xen-libs-3.0.3-41.el5.x86_64 Updated: xen-libs-3.0.3-41.el5.i386 Installed: kernel-xen-2.6.18-53.1.14.el5.x86_64 Updated: xen-3.0.3-41.el5.x86_64 After the update, I rebooted the machine. Now, I cannot get xend to start:

DV suggested that we document some libvirt setups using shared storage. I'm not a fan of NFS, so I wrote some blog posts on how to use iSCSI in the context of libvirt + KVM. There is of course more than one way todo things, so I've outlined a couple of different options. One completely manual command line approach using tgtadm on the iSCSI server:

Dear All I try to migration a kvm guest os to another host failed server: ubuntu 11.04 server virsh:migrate --live --tunnelled vm1 qemu+ssh://192.168.10.3/system error:Requested operation is not valid:cannot perform tunnelled migration without using peer2peer flag

Hi, I am running on "Dell PC Model No: DHS" running RHEL 5 snapshot 5 (kernel-2.6.18-1.2910.el5) I built xen-unstable source using the changeset 13495. . Dom0 came up. I tried creating a file based Virtual Machine and tried running CentOS 4.3. The command "xm create -c master.cfg" where master.cfg is the configuration file gives an error Error: (22,

Hi All, Will some one explain how is this tls libvirt server is implemented. For my testing purpose I need to implement the similar TLS server in Java or Python and this server is capable to receive all libvirt calls like getCapabilities, hostname etc and return response as I'm configured. Basically I need to simulate the libvirt TLS server. I tried creating many TLS server but none of the my

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

Thanks for the reply! output: net.ipv4.ip_forward = 1 What do you mean "The out:any and" Anywhere else I can look as to why the connection isn't going? Do I need some kind of listener at that port on the host? I'm not even seeing the packet count on the prerouting chain increase when the connection attempts are made. On Thu, Aug 30, 2018 at 8:58 AM Martin Kletzander

I've run into a problem on my KVM host where a single guest will be unreachable to other guests on the same host. This host has 2 bridged devices and guests assigned to each have the same issue. I've noticed that when I can't reach the problematic guest, the ARP entry for that system is incorrect. This issue seems to only be a problem about 75% of the time when making connections

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 Virsh / LibVirtd Version: 4.0.0 Here’s the contents of /etc/libvirt/hooks/qemu  

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 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 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