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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How to change IP address on Ubuntu KVM

I have one physical server running kvm with 4 vms on it. For each vm i used an own IP address. Now my colocation provider is changing all IPs. What is the update strategy? Log in on each vm and ...
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What is the difference between flow control and congestion control at layer 2 and 3? [closed]

Is there a difference between flow control and congestion control at the following layers? layer 2(data link layer) layer 3(network layer) If they are not same, then how is each handled at the ...
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Bridging with aliased Ethernet card for Virtualizing with single Ethernet card

We are having a server with good CPU and RAM,so we are planning to do XEN virtualization on ubuntu 12.04 server to handle high traffic. The plan is to keep the host machine only to manage VMs(no NAT ...
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iptables / bridge / NAT setup

Between our gateway and our LAN, we have a bridging firewall running iptables. I want to add an additional NIC into the firewall and set up a private subnet on it. Traffic from this subnet which is ...
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Point to Point wireless network

I have to link two offices 0.62 miles apart with a wireless link. So far my setup is as follows : 2 24db directional parabolic wifi antenna 1 watt wifi amplifiers on each antenna Access point on ...
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Linux Bridge, Samba netbios name/hostname access

I am currently running a linux bridge in the following configuration ADSL Modem: 192.168.1.1 Linux Bridge: eth0: 192.168.1.2 eth1: no address Wireless Router: 192.168.0.1 My issue is that i ...
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Best Zero-Config Powerline or 802.11 Bridge

Need to ship a device to a remote non-technical user for connecting a device that only supports an ethernet cable, and no physical port in the same room. Some of the Linksys devices (Powerline ...
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Bridged Networking with bhyve and FreeBSD Guests does not work

I have a FreeBSD10 host with bhyve and the following IP-configuration in rc.conf: ifconfig_igb0="inet X.X.X.146 netmask 255.255.255.0 broadcast X.X.X.255" defaultrouter="X.X.X.254" ...
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How to setup IP alias on bridged interface in Ubuntu

How do I setup an IP alias on a bridge (br0) device on Ubuntu ? If I wait for br0 to come up and then do /sbin/ifconfig br0:0 192.168.10.1 netmask 255.255.255.0 then it works fine. If however ...
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Network bridging in VM broke connectivity to host; what did it do?

I screwed something up royally, but I want to understand how exactly I screwed it up. Bear with me because I'm not a networking expert. Here is how my network is configured: [HyperVHost] ...
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How do I keep a bridge enabled on a bonded interface?

I'm working on setting up a pair of CentOS 6.3 servers that will run a couple of KVM vms and have come across a problem setting up a bridge on a bond. I am using Mode 4 (802.3ad) bonding on a pair ...
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VMWare Player guest does not re-aquire IP on bridged interface after host loses and re-acquires network connectivity

I am running a Ubuntu Linux image in VMWare Player on my laptop. The host is Windows XP. There are two network adapters configured in VMWare Player - one is host-only and the other is bridged. ...
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Force linux bridge to obtain ip via DHCP

I'm trying to understand the logic behind the failure in the following scenario: a. If a linux bridge with 2 interfaces, eth0 (LAN) and eth1 (WAN) is behind an ISP device e.g. a cable modem, it does ...
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KVM VMs and virtual network, how to assign external IP addresses?

So, my question is: there is a remote server on Red-Hat with an external IP-address, eth0: inet addr: 87.112.140.53 Bcast: 87.112.140.255 Mask: 255.255.252.0, and is a virtual interface, which raises ...
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832 views

IGMP V3 support in Linux-2.6.35

I am trying to start a bridge connection and force it to use IGMPV3. The following command will explain my issue better : The below is the output of force_igmp_version before issuing brctl commands ...
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Real life virtual bridge setup on Debian

How do I get the bridge setup done with multipe IP addresses. Ideally, I would have 4 virtual systems each with it's own IP address but also an intranet address (like 10.#.#.#). So that they can ...
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iptables on bridged networking

I need some assistance to create a set of iptable rules to route and restrict usage between interfaces in a bridge (br0). # brctl show bridge name bridge id STP enabled interfaces ...
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Windows Server 2008 R2 as guest in virtualbox: make accessible from all network nodes within the subnet of my host

I want to install Exchange 2010 on a Windows Server 2008 R2 in my virtual box v4 running on my laptop (running Windows 7). Additionally I have a Windows Phone 7 on which I want to access the Exchange ...
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Xen domU needs to be on different network (vlan) than dom0

We have multiple VLANs setup between different sites, and are using them to connect our dev. network, 192.168.3.x, and a management network, 172.16.20.x. I have a Xen dom0 on 192.168.3.x; one of it's ...
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Bridging interfaces for openvpn on ubuntu server

I am using this script to create a bridge for openvpn: #!/bin/bash br="br0" tap="tap0" eth="eth0" eth_ip="192.168.8.4" eth_netmask="255.255.255.0" eth_broadcast="192.168.8.255" for t in $tap; ...
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Transparent Bridge on Windows XP

Bascially i need to set up a configuration like the following: http://wiki.wireshark.org/CaptureSetup/Ethernet#Capture_using_a_machine-in-the-middle I have a computer with windows XP and 2 nics. I ...
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Create bridged networking in KVM without libvirt

I've created a bridge on the host with a method similar to the one here: http://wiki.libvirt.org/page/FAQ#Why_doesn.27t_libvirt_just_auto_configure_a_regular_network_bridge.3F However, to link the ...
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Enterprise Linux: VLAN bridges

How do you properly configure vlan bridges on RHEL5 or OEL5? I've tried the following network-scripts, but no packets are recieved on the bridge. If I add an ip address to vlan60 I'm unable to reach ...
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Connecting 2 subnets securely

Im working on a plan to isolate some parts of our work network. Ideally some computers need to be decoupled from our main network (they do extremely sensitive work and so need to be extra secure from ...
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113 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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Bridge in Debian Linux (Wheezy) cannot access WAN hosts by name

I'm having the same problem as this poster: bridging two network interfaces in ubuntu linux 12.10 AND being able to access it from that machine and would be grateful for any help on how to debug it. ...
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114 views

KVM virtualization with two bridges, want routing to use each bridge as mapped in KVM

I can't seem to find an existing question like my scenario. I'm using 2 public bridges for 4 VMs. Two VMs per bridge device. Interface stats show there is use of the assigned bridge for the VM on ...
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114 views

Understanding an OpenVPN bridge from iptable's point of view

In my scenario, there is a machine which acts as both an iptables-based firewall and an OpenVPN-server at the same time. It has two network interfaces - eth1 is connected to the internet whereas eth0 ...
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35 views

NIDS on bridged firewall

I have a firewall (Debian Stable 7.5) which works in bridged mode. The interfaces eth0 (WAN) and eth1 (LAN) are linked with the bridge interface br0. Can I deploy a NIDS (eg. Snort) on this server? ...
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How do I configure bridged networking for VMs

I'm setting up a KVM virtualization server in CentOS 6. How do I configure bridged networking? (I think I need network interface eth0 to be accessible to VMs) I have tried to follow this guide: How ...
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Scanning tagged traffic over bridge through iptables

I am working on bridge on linux box using brctl. Now I have to scan and monitor bridge traffic through iptables. So for the same I changed: net.bridge.bridge-nf-call-iptables = 0 to ...
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bridge, vlan and internet access. How?

I'm trying to setup a working connection between my local network and the internet. First I setup a bridge (br0, has an IP address where the other interfaces don't) between eth0 (LAN) and eth1 ...
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Mirror network packets from WiFi to Ethernet in an ASUS Router RT N53

I have an ASUS RT N53 router, running the default firmware (Linux 2.6.22 with busybox and uclibc). I need to capture data packets from some Wi-Fi devices I have connected to that router (iPad and some ...
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How to capture arp table when using network bridging?

I have a computer with 2 NICS that are bridged and I need a means of distinguishing between machines connected to eth0 from machines connected to eth1. I was hoping to use something like the "arp -a" ...
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Layer 2 bridged networking issue with QEmu

I am having a problem with a layer 2 bridged network configuration using Linux, QEmu, and VMware ESX. The configuration works fine on a small isolated network, but once introduced into our large ...
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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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276 views

Xen Networking - Separating Dom0 from DomU

I'm having some issues regarding Xen Networking and I was wondering if you could point me in the right direction. I have a server with 2 NICS (Xen over Ubuntu Server - Xen Bridge scripts) Each NIC ...
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393 views

Default gateway and bridged interface

I have slackware based server with openvpn bridging, this is my settings of interfaces: root@senior:/# ifconfig br0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet ...
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Bridge networking static IP's to virtualbox VM's

Ok, so I have a dedicated server with the static primary IP address 89.200.xx.xx, it's running 3 VM's in virtualbox (all Centos 6 as is the server) and I have 3 other IP's that I want to assign to the ...
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Changing Linux Layer2 forwarding decision?

Are there tools to define in Linux something similar to Policy-based Routing, but on Layer2 level? Usual Linux bridge uses destination MAC to decide, which interface to send frame to. Can this ...
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bridging two network interfaces in ubuntu linux 12.10 AND being able to access it from that machine

Ok, i have about had it but heres the deal. I have 7 total machines connected like this: [5 workstations]<--->ServerPC<---->MAINPC<---->router FYI, dont worry about the workstations they ...
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Bridging Networks Between Buildings

I'm trying to set up a WiFi link between two buildings. On one side I've got a regular SoHo (network A) router (Linksys EA4500) and on the other side I've got an Alfa AWUS036H (network B) connected ...
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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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Routing Traffic on Ubuntu to give Raspberry PI Internet Access [closed]

I'm hoping someone can point me in the right direction for setting up my Linux (Ubuntu 12.04) box to route traffic from eth0 to wlan0. I'll try and explain the problem I am trying to solve: I ...
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Adding vifs to bridge under Xen suddenly stops working

We have a setup here with around 30 Dom0s running Xen 4.0.3 with a Dom0 Kernel of 2.6.32.57 x86_64. (We have seen the same behaviour with Xen 4.0.1 and kernel 2.6.32.2X earlier) Sometimes all of a ...
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OpenVPN up directive not working

I'm having trouble setting up OpenVPN on my server running CentOS 6.2. I have used OpenVPN on this server before and it worked (although that was with Ubuntu, now I'm using CentOS). I just reformatted ...
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129 views

fail2ban with bridge-util

Hello and happy new year, I am wondering if I can use fail2ban on a virtual host that uses bridge-util. I am using LXC containers for virtualization and have therefore direct access to all the log ...
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ClearOS transparent firewall and web proxy mode possible?

In other firewall software packages I have seen the ability and am hoping it is possible with ClearOS to put it in to transparent or bridged mode where the device sits physically between the client ...
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421 views

Correct use of a transparent bridge

I've asked a similar question previously but I am just now sure I am understanding what I need to do. My current set-up is as follows: ...
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pfsense setting up as transparent firewall - dhcp issue

I followed the directions to set up pfsense in bridged / transparent mode per the instructions at http://doc.pfsense.org/index.php/Configuring_pfSense However I can not get a dhcp address from my ...