search for: virbr2

Displaying 20 results from an estimated 30 matches for "virbr2".

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2019 May 31
2
Easy solution for custom firewall rules- is it possible?
...s and haven't found an answer to this question: is it possible to have libvirt add custom rules to iptables for virtual network interfaces? I took a look at the "Firewall and Network Filtering in Libvirt" page and it seems overly complicated for what I want to do. Given an interface virbr2 and its network 192.168.4.0/24, libvirt installs the following rules in iptables. Essentially, these rules will drop any packets for the interface virbr2 where the source or destination is not on the 192.168.4.0/24 network. -P FORWARD ACCEPT -A FORWARD -d 192.168.4.0/24 -o virbr2 -j A...
2017 Jun 20
2
guest A from virbr0 can talk to guest B in virbr1 but not vice versa
...39;> <name>besider</name> <uuid>cc714cce-dbba-452d-b2bf-d36084dcb723</uuid> <forward mode='nat'> <nat> <port start='1024' end='65535'/> </nat> </forward> <bridge name='virbr2' stp='on' delay='0'/> <mac address='52:54:00:59:67:7f'/> <domain name='besider'/> <ip address='192.168.110.1' netmask='255.255.255.0'> <dhcp> <range start='192.168.110.2' end='1...
2019 May 31
0
Re: Easy solution for custom firewall rules- is it possible?
...o this > question: is it possible to have libvirt add custom rules to iptables > for virtual network interfaces? I took a look at the "Firewall and > Network Filtering in Libvirt" page and it seems overly complicated > for > what I want to do. > > Given an interface virbr2 and its network 192.168.4.0/24, libvirt > installs the following rules in iptables. Essentially, these rules > will drop any packets for the interface virbr2 where the source or > destination is not on the 192.168.4.0/24 network. > > -P FORWARD ACCEPT > -A FORWARD -d 192...
2017 Jun 20
0
Re: guest A from virbr0 can talk to guest B in virbr1 but not vice versa
...r</name> > <uuid>cc714cce-dbba-452d-b2bf-d36084dcb723</uuid> > <forward mode='nat'> > <nat> > <port start='1024' end='65535'/> > </nat> > </forward> > <bridge name='virbr2' stp='on' delay='0'/> > <mac address='52:54:00:59:67:7f'/> > <domain name='besider'/> > <ip address='192.168.110.1' netmask='255.255.255.0'> > <dhcp> > <range start='192.168.1...
2016 Apr 04
1
add external access to routed dnsmasq
I have created a routed virtual network. From within the routed net, DNS requests to the dnsmasq interface virbr2 work fine. On the libvirt host, DNS requests to the dnsmasq interface virbr2 work fine. I would like to allow external hosts, on the same network as the libvirt host, to query the dnsmasq interface. However external DNS queries to the virbr2 interface time out. The iptables firewall for this int...
2020 Apr 17
3
Re: My VMs don't get IP with libvirt and dnsmasq
...his configuration should be made using: ## virsh net-edit pepito ## or other application using the libvirt API. ## ## dnsmasq conf file created by libvirt strict-order user=libvirt-dnsmasq pid-file=/var/run/libvirt/network/pepito.pid except-interface=lo bind-dynamic interface=virbr2 dhcp-range=192.168.150.2,192.168.150.254 dhcp-no-override dhcp-authoritative dhcp-lease-max=253 dhcp-hostsfile=/var/lib/libvirt/dnsmasq/pepito.hostsfile addn-hosts=/var/lib/libvirt/dnsmasq/pepito.addnhosts El vie., 17 abr. 2020 a las 12:33, Michal Privoznik...
2020 Nov 07
0
Upgrade CentOS 7 to 8, error: network is already in use by interface
Hi, I've been trying to migrate some of my CentOS 7 KVM hypervisors to CentOS 8, and I have encountered the following issue while trying to load my network config: virsh:     error: Failed to start network test1     error: internal error: Network is already in use by interface virbr2 journalctl:     error : networkCheckRouteCollision:123 : internal error: Network is already in use by interface virbr2 I use the following network definitions, which are a bit non-standard, however they work perfectly on CentOS 7: <network>   <name>test1</name>   <fo...
2016 Jan 23
5
RX dropped packets on guests subnets
...69753:18403044] :FORWARD ACCEPT [1043010:781448344] :OUTPUT ACCEPT [123913:208199933] :POSTROUTING ACCEPT [1166923:989648277] -A POSTROUTING -o virbr1 -p udp -m udp --dport 68 -j CHECKSUM --checksum-fill -A POSTROUTING -o virbr3 -p udp -m udp --dport 68 -j CHECKSUM --checksum-fill -A POSTROUTING -o virbr2 -p udp -m udp --dport 68 -j CHECKSUM --checksum-fill COMMIT # Completed on Sat Jan 23 10:49:51 2016 # Generated by iptables-save v1.4.21 on Sat Jan 23 10:49:51 2016 *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [120960:207745702] -A INPUT -i virbr1 -p udp -m udp --dport 53 -j ACC...
2019 Jun 03
1
Re: Easy solution for custom firewall rules-
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 state='ESTABLISHED'/> </rule> <rule action='accept' direction='out' priority='500'>...
2020 Apr 17
1
Re: My VMs don't get IP with libvirt and dnsmasq
Hi, That was right. I mean, I've tried it at the same time in both machines I have (the one where it works and the other), and using tcpdump -i virbr2 in both ones, after creating the domain with virsh, showed that the right one is getting DHCP traffic, but there's no DHCP request or anything about DHCP in the one that is not working. El vie., 17 abr. 2020 a las 12:50, Michal Privoznik (<mprivozn@redhat.com>) escribió: > On 4/1...
2014 Oct 05
1
Re: Assigning IPv6 address to guest
...ping the link-local addresses of the >> eth1 interface on the VM (via `ping6 fe80::5054:aaff:fe00:f057/64`). >> ip -6 nei on the VM gives me: >> `fe80::5054:ff:fe1d:a4bb dev eth1 lladdr 52:54:00:1d:a4:bb router STALE` >> >> > Hi, > > Your setup shows > virbr2 and br0 both on the same network 2607:5300:60:1156::2/64 which > will cause issues with routing. This however must not affect the pinging > of link-local addresses > > ON the virtual machine: > ping -I <eth0> <link-local of server> > must work. > If not >...
2020 Apr 16
4
My VMs don't get IP with libvirt and dnsmasq
...9;m using an Ubuntu 18.04 LTS, I have libvirtd already installed and I think I got all the dependencies installed. So, I'm using virsh net-create to create this network: <network> <name>pepito</name> <forward mode='nat'/> <bridge name='virbr2' stp='on' delay='0'/> <ip address='192.168.150.1' netmask='255.255.255.0'> <dhcp> <range start='192.168.150.2' end='192.168.150.254'/> </dhcp> </ip> </netw...
2020 Jul 19
4
Routed network can't reach outside network
...etwork connections="1"> <name>routed</name> <uuid>970a25f7-29b6-4a6b-b890-f593eae4fc15</uuid> <forward dev="wlo1" mode="route"> <interface dev="wlo1"/> </forward> <bridge name="virbr2" stp="on" delay="0"/> <mac address="52:54:00:bf:35:42"/> <domain name="routed"/> <ip address="10.2.2.1" netmask="255.255.255.0"> <dhcp> <range start="10.2.2.2" end=&q...
2010 Jun 30
0
FYI: a short guide to libvirt & network filtering iptables/ebtables use
...e=routed ----------- Allow inbound, but only to our expected subnet. Allow outbound, but only from our expected subnet. Allow traffic between guests. Deny all other inbound. Deny all other outbound. target prot opt in out source destination ACCEPT all -- * virbr2 0.0.0.0/0 192.168.124.0/24 ACCEPT all -- virbr2 * 192.168.124.0/24 0.0.0.0/0 ACCEPT all -- virbr2 virbr2 0.0.0.0/0 0.0.0.0/0 REJECT all -- * virbr2 0.0.0.0/0 0.0.0.0/0 reject-with ic...
2014 Oct 04
2
Re: Assigning IPv6 address to guest
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 10/4/2014 8:46 PM, Bhasker C V wrote: > On 04/10/14 15:36, The Cop wrote: >> Hello, >> >> I am trying to assign an IPv6 address to one of my guests. I followed the >> following guide, unsuccessfully: >>
2020 Apr 17
0
Re: My VMs don't get IP with libvirt and dnsmasq
...: > Hello! > > Thanks for your answer. > > Well, I think it has to ask for an IP as I have the same configuration > in a different machine (with the same OS) and it works, there I see the > DHCP packets and so on, but not here. Well, do you actually see DHCP traffic on the virbr2 bridge? Because if not then the guest configuration is probably not correct. > And yeah, that pepito.conf file > exists, this is its content: > ##WARNING:  THIS IS AN AUTO-GENERATED FILE. CHANGES TO IT ARE LIKELY TO BE > ##OVERWRITTEN AND LOST.  Changes to this configuration should b...
2010 Apr 01
0
Creating a private network
...that is part of the bridge network, virbr1. However, when I run virsh attach-interface with domain-0, it fails. What am I missing?? Matt OS: RHEL 5, Xen kernel virbr1 Bridge Network (First attempt) <network> <name>private</name> <bridge name="virbr2" /> <ip address="169.254.1.1" netmask="255.255.0.0"> </ip> </network> virbr1 Bridge Network (First attempt) <network> <name>private</name> <bridge name="virbr2"...
2020 Apr 17
0
Re: My VMs don't get IP with libvirt and dnsmasq
...ave libvirtd already installed and I > think I got all the dependencies installed. So, I'm using virsh net-create > to create this network: > > <network> > <name>pepito</name> > <forward mode='nat'/> > <bridge name='virbr2' stp='on' delay='0'/> > <ip address='192.168.150.1' netmask='255.255.255.0'> > <dhcp> > <range start='192.168.150.2' end='192.168.150.254'/> > </dhcp> > <...
2015 Aug 26
3
Isolated networks && test lab
...to the Host (tested using 'ssh 192.168.x.1'.) I'm trying to isolate the networks from the Host and have the router receive packets for the 192.168.x.1 address on the individual Isolated network segments. Host: br0 (em1): 192.168.1.16 vibr0 (default): 192.168.122.1 virbr1: 192.168.2.1 virbr2: 192.168.3.1 virbr3: 192.168.4.1 VM router: eth0: 192.168.1.10 eth1: 192.168.2.1 eth2: 192.168.3.1 eth3: 192.168.4.1 VM client: eth0: 192.168.3.101 Is there some trick to isolate the Host from the VM's? Is there a comprehensive guide that explains how the networks should be setup (with/...
2020 Jul 23
2
Re: Routed network can't reach outside network
...ed' looks like: <network> <name>routed</name> <uuid>970a25f7-29b6-4a6b-b890-f593eae4fc15</uuid> <forward dev="wlo1" mode="route"> <interface dev="wlo1"/> </forward> <bridge name="virbr2" stp="on" delay="0"/> <mac address="52:54:00:bf:35:42"/> <domain name="routed"/> <ip address="10.2.2.1" netmask="255.255.255.0"> <dhcp> <range start="10.2.2.11" end=&...