Bridging is a forwarding technique used in packet-switched computer networks. Unlike routing, bridging makes no assumptions about where in a network a particular address is located.

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xen creating a new virtual machine with bridge networking

I am using CentOS 6.5 64 use this tutorial to setup Bridge [root@CentOS ~]# brctl show bridge name bridge id STP enabled interfaces xenbr0 8000.08002754b3fa yes ...
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Is it secure to expose LAN to bridged DSL modem?

I connected my router and DSL Router (in bridged mode) together like this: (click for full image) Strange setup, I know. :) The reason was I wanted my DSL router to continue to work as a switch and ...
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IP Bridge for KVM with multiple subnets

I have a machine set up running KVM and a bridge on eth0 with the ip address for the machine. The machine has an IP address in a range with no more ip adresses free. I am trying to make a second ...
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Create and bridge virtual network interfaces in Linux

I have a tool that replays traffic from a .pcap file and another tool that interprets that traffic. For testing purposes, I need to play traffic out one interface and have it come in another. ...
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Bonding/Teaming 2 NIC cards : pro and cons

I want to get your idea on bonding two NICS on a server that is connected to a single subnet with only one IP address in a Gigabit LAN enviroment. What is the pros and cons of having two teamed Gibit/...
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Using OpenVPN on Two Linux Machines *not on the gateways* to link the networks over the internet

I am running OpenVPN linking two linux machines on two networks. These machines are not the networks' gateways. There are also separate DD-WRT routers which are acting as the gateways on both ...
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709 views

Configure iptables with a bridge and static IPs

I have my server set up with several public IP addresses, with a network configuration as follows (with example IPs): eth0 \- br0 - 1.1.1.2 |- [VM 1's eth0] | |- 1.1.1.3 | \- 1....
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MAC address for DHCP when using bridge with 2 NICs?

I have a Ubuntu system with 2 NICs where I want to create a bridge br0 and bind both NICs to that bridge using the bridge_ports eth0 eth1 option. I also want to configure the bridge to get an IP ...
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Question about working of bridge in Ethernet (CSMA/CD) Network

Bridges and CSMA/CD Networks Suppose two LAN segments A and B connected to each other by a bridge. In the steady state (when bridge has learned the locations of the computers on both segments) the ...
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Bridged virtual interface is not available or visible to ifconfig

I'm running Ubuntu 9.04, kernel 2.6.28-18, and vmware-server 2.0.1. I'm attempting to setup a virtual linux machine to use a bridged interface rather than NAT or host-only. Both NAT and host-only ...
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debian lenny xen bridge networking problem

DomU isn't talking to the world, but it talks to Dom0. Here are the tests that I made: Dom0 (external networking is working): ping 188.40.96.238 #Which is Domu's ip PING 188.40.96.238 (188.40.96....
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wget only works when tcpdump is listening

I am running two Virtual Machines over the XEN hypervisor both with Ubuntu trusty (Linaro-Developer version) with the following simple bridge networking setup: Backend domain (dom0): br0 ...
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CentOS 6 ELRepo kernel bridge issues

I'm currently running the following Kernel on CentOS 6.6 from ELRepo [root@de14 ~]# uname -r 4.0.4-1.el6.elrepo.x86_64 Anything related to a bridge doesn't work, what I've come to ...
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960 views

Tcpdump/Iptables on bridge interface without assigned IP address

I have set up a bridge interface without an ip on it. $ brctl addbr br0 $ brctl addif tap0 $ brctl addif tap1 $ ifconfig br0 up As seen above, this bridge is connecting 2 TAP interfaces setup ...
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836 views

High packet loss with kvm, bridge and bonding

I have 2 servers connected through cisco linksys sg500. Both hosts have identical configuration (Ubuntu 14.04 LTS, 4 * 1Gb/s network interfaces with bonding). When I set up bridge and interface ...
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120 views

Linux virtual bridge not transparent

I'm attempting to set up the Openstack tutorial demo using libvirt VMs on my desktop but I'm having some problems with the virtual bridge on the host desktop. While debugging this, I noticed that the ...
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Linux bridging for KVM

I have a Debian Wheezy machine on which I tried to setup KVM with bridged networking. Unfortunately, the bridge does not appear to forward traffic correctly. My setup is the following: The physical ...
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Ubuntu/KVM Bridge Interface IP Assignment

I have a Ubuntu 12.04 LTS machine running KVM/libvirt. It has two physical ethernet interfaces. I have dedicated eth0 as the primary interface and configured bridging on eth1 for my VMs. The KVM host /...
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Bridged network connection not working on Ubuntu VM

I am in a corporate environment and there is 802.1x authentication set up which is using my windows credentials + domain to authenticate. Setting up that information for my connection in the VM only ...
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Bridging eth0 to wlan0

I'm trying to create the followig setup: +----------+ | Wi-Fi | +----------+ ...
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Bridge to a used eth1 card without losing connection via that card

How can I set bridge between a real eth card on a remote machine without losing my ssh connection to that machine. I ssh into a machine via its eth1 iinterface. 172.168.40.2 255.255.255.0. I ...
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Bridge NICs with automatic pass-through

I am looking at using a computer with a dual-NIC card (one with two NIC ports) as an in-line traffic shaper / URL filter / traffic analyzer, etc. (probably using pfSense), but I am concerned that if ...
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Remotely connect to isolated network

i have a network which is isolated from the Internet and I need to remotely connect to it from time to time for maintentance purposes. Please note that i do not need to connect to a specific computer ...
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KVM-Guests can't get past bridge - no internet connection

I'm running a backported KVM on a Debian Squeeze. ATM the KVM-Guest can't connect to the internet through the bridge I have set up. The guests can reach each other, the host but nothing outside. I can ...
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Trouble with NATing

I'm a networking noob, so sorry for the very generic title. I have the network setup in the following way: A few details about the network: eth0 on all the devices have an in IP in 10.10.10.0 ...
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Centos KVM Host OS not passing all network traffic Guest OS

I'm running KVM on Centos 5. I have a guest OS, ubuntu 10.04, that has Snort 2.9 installed on it. The guest OS has (2) nic's, eth0 and eth1. One nic, eth0, is configured with an IP and can be ...
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snmpd configuration to enable BRIDGE-MIB or Q-BRIDGE-MIB

All the Ethernet switches and access points on my network provide snmp access to the bridge learn table except for my linux-based bridge. Does net-snmp support exporting the bridge forwarding ...
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ubuntu 10.04; kvm bridged networking not working with public ip addresses

I have a dedicated hosted server box with ubuntu 10.04 64 bit installed. I would like to run kvm with ubuntu 8.04 installed for some php 5.2 compatible apps(they don't work right with php 5.3, the ...
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openwrt uses a single interface bridge?

My understanding of bridging is that it ties together two interfaces at layer 2. I am looking at a Ubiquiti Nanostation2 running OpenWRT that has an ethernet port 'eth0' and a wifi port 'ath0'. The ...
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Linux: Bridge doesn't forward if interface is WiFi?

I have an Edimax EW-7318USg which comes with an Ralink rt73 and its USB. When trying to bridge (to share internet for example) it doesn't work. But today I tried to do the same with a wired interface,...
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Issue with multiple bridging for KVM hosts

I'm using KVM and libvirt on my host (Debian lenny) + 2 bridges per guest (one for mgmt, one for public traffic). That setup isn't stable at all, sometimes I can do pings to a management ip, sometimes ...
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Amazon EC2: OpenVPN server won't route bridged packets from client to VPC subnet

I have a bridged OpenVPN setup on a Linux server in an Amazon EC2 VPC. (Spent hours on docs, reading similar problems, here, openVPN forums, no luck yet.) The bridged interface is up and contains ...
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Proxmox with an Openvswitch bridge

All, I'm trying create a way for me to be able to use the local network within my Proxmox infrastructure. Currently, everything is running off of NAT from wlan0 and all internal machines have the ...
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Dummynet Filtering not working on FreeBSD 10

I am trying to do network emulation using dummynet in FreeBSD 10. I have this working in 9.3 however things must have changed and I cant determine exactly what but my setup no longer works. I have ...
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KVM bridging for virtual machines is not working

After restarting the server, I can not ping and reach my virtual machines from the net and vice versa [root@pc1(192.168.0.114) ~]# ping 192.168.0.63 PING 192.168.0.63 (192.168.0.63) 56(84) bytes ...
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How can i prevent TINC from relaying DHCP

I am running tinc in several NAT routers running Debian 7 Wheezy, the VPN works fine for months, except because i've set it up in switch mode it relays DHCP requests and answers over all the VPN. The ...
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LXC container can only access host via bridge

I have an LXC container with i686 Ubuntu 12.04 running on a x86_64 Ubuntu 12.04 host. I've set up a bridge using instructions here. However the ping from the container only goes through to the host ...
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Filter broadcast traffic in a bridge port

I have a linux bridge with three interfaces, e.g. tap0, tap1 and tap2. What I would like to do is to modify the standard bridge behavior in the following way: If a L2 broadcast is originated from ...
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linux container bridge filters ARP reply

I am using kernel 3.0, and I have configured a linux container that is bridged to a tap interface in my host computer. This is the bridge configuration: :~$ brctl show bridge-1 bridge name ...
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KVM is NOT seeing multiple bridges (only macvtap devices)

I am in the process of doing some thesis research about using ebtables and iptables on a KVM host to perform on-the-fly firewall restrictions to KVM guest VM's. Here is the problem: I have a bridge ...
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Access to WAN from one VLAN

i want to create a VLAN for 3 guest VMs. I already have it and every VM can ping each other, but the problem is that any guest CAN NOT have access to Internet Network configuration in Host machine # ...
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bridging real and virtual wireless network interfaces

I have 2 wireless interfaces, one real (eth1) and one virtual (vt0), running on top of the same physical wireless adapter. Both have separate IP address spaces. eth1 is connected to a laptop, and vt0 ...
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how to block access from bridge mode vpn nodes to my wan gateway

We have a tap bridge between 2 local networks. It work great except that clients from the 'other' network can use dhcp server and most important can use wan gateway of the second network which is bad. ...
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Centos/OVH: public IP on KVM virtual machine

Since a few days, I'm trying to configure my KVM vm to have a public IP address, without any success. First, I'm on OVH, and you need to know they don't allow networking from different mac addresses. ...
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Cannot access LAN Printer

Environment: I have a Brother 7360N Network Printer connected to a TPLINK Router over an Ethernet cable. My desktop, running Windows 8 is connected to the TPLINK Router over an Ethernet cable. A ...
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xen and libvirt bridge configuration

I have a Centos 5.5 server with Xen 3.2 and libvirt for virt-manager installed. Before installed libvirt I have the bridge configuration just like the documentation on Xen says: xenbr0, eth0 and ...
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Assistance with bonding vlans and bridges on Ubuntu 12.04

We're trying to set up four nics in bond0 with 3 tagged vlan's and three bridges for KVM VM's on Ubuntu 12.04. Using the interfaces file below I can manually start and stop networking and get the ...
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Accessing WRT54G admin through WET610N bridge

I am using a WRT54G router to host a few computers and servers. I have another computer that is wired to a wireless bridge, which is a WET610N. How do I access the admin page of my WRT54G through my ...
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955 views

firehol (firewall) with bridge: how to filter

I have two interfaces: eth0 (public address) and lxcbr0 with 10.0.3.1. I have a LXC guest running with ip 10.0.3.10 This is my firehol config: version 5 trusted_ips=`/usr/local/bin/strip_comments /...
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NFS and KVM. Slow Speed

I have a KVM virtualization in Debian with 2 guests (Debian and Windows 2008). I want to have a 'mount point' shared that can be accessed by the 3 system (host and 2 guests) at the same time. So the ...