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 HVM Windows 2008 network bridge

I have a problem with the Windows Server 2008 guest (hvm). I can't get a network interface running for him. I also have a Debian guest and it's working ok, but I can't do it with the Win2k8 guest. ...
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dsl router for bridging two lans

I have two office locations that each have DSL service. I have the routers set up so that the two subnets, 10.0.1.x and 10.0.2.x, correctly keep data on each subnet and or pass across to the other ...
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Spam filtering in bridging

I'm using sendmail with spamassasin, one of my server is working behind it. All the port 25 traffic for the server behind it is being filtered. User are using SMTP authentication enabled in ...
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Site-to-Site IPSec VPN: bridged only

I'd like to setup a site-to-site IPSec VPN tunnel between a head office and a branch office, and for political/security reasons, with the sole purpose of being able to access a "Management" subnet at ...
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Can we connect LAN (Ethernet) with a wide area network?

Suppose we want to connect a local area network (Ethernet) with a wide area network, the question arises is, can we connect a local area network with wide area network? If we directly connect the ...
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Cannot ping from a bridged inteface

I am trying to bridge between eth2 and br0 from Ubuntu 11.04 within virtual box. There is network bridging to host physical machine. From the guest OS after bridging I can ping from br0 but ...
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How do bridges really work?

I'm in a major confusion here, regarding bridges. I thought that they were devices that allowed going from one network to a different one without routing (doing the work at layer 2 instead), but if ...
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How to bridge a range of public IPs to KVM virtual machines on Debian/Ubuntu

I've been trying for weeks to figure out the right network configurtion for sharing a range of public IPs with KVM virtual machines running on my server, but so far with little luck and with the help ...
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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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MAC address table in Windows

How can I see the MAC address table of a Windows network bridge? Is it possible trough command line to find this information? EDIT: I am interested to see the same table that it is possible to see in ...
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Proper way to expose VirtualBox' machine to network via “one MAC” security locked switch port

Say, we need to expose LXC container (LXC) or Virtualbox VM (VBM) to public network with its own IP-adress (within additionaly assigned network — ADD-net) which is to be routed through main host. When ...
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Virtual Box: Bridging to Virtual Interface (eth0:1)

I have four IP addresses on my Debian machine: 1 main (eth0) + 3 extra (eth0:0, eth0:1, eth0:2). I want to assign the eth0:1 as bridged network to my VM. Who do I need to add in the ...
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Xen network-bridge interface renaming

According to the comments in Xen's network-bridge script, the process of starting the bridge with external interface eth0 is thus: # Creates the bridge # Copies the IP and MAC addresses from eth0 to ...
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Cross-VLAN sharing and auto-discovery of selective resources

I have a network with several VLANs that each contain resources or clients with different access rights. For simplicity, let's say I have 3 VLANs: ID 10: Contains privileged clients and private ...
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101 views

Prevent hijacking IPs in a bridged network (KVM/libvirt)

Is there a solution to prevent a VM user assign/use IP addresses he doesn't own but are routed over the same bridge like his own addresses? The current setup looks like this with libvirt and KVM: ...
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lxc vm access outside the host

On Debian 64bit, I configured a lxc like this : host ip : 172.16.0.25 vm guest on this host : 172.16.0.44 I've done the bridge on my host auto eth0 iface eth0 inet manual up ...
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337 views

Is there a way to create virtual network between vm on xen with out creating shared bridge with n/w interface

xen 4.1.2 is running with ubuntu 12.04 as dom0. I need to enable networking between vm only(which means not creating a bridge between Ethernet card and sharing among vm). when i installed ...
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765 views

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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475 views

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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725 views

Bridge ppp0 and eth0

I have seen many posts explaining bridging eth and wlan interfaces. I would like to know if it is possible to bridge ppp0 interface (a USB modem) and eth0. I have a working internet connection through ...
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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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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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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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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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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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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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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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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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892 views

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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Linksys WRT54Gx as Repeater Bridge

I have a Linksys WRT54Gx router with DD-WRT software working fine. But. Is it possible to use it as a Repeater Bridge when the host router isn't configured to be in the default 192.168.1.1 subnet? ...
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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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pfsense with 4 WAN IP and outgoing NAT

I have a pfsense with a single wan ip, i want to assign multiple wan ip's. The pfsense machine is located on a vm machine with the other servers i wish to NAT forward. I want to give each server a wan ...
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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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CoreOS, Docker networking, more than one bridge?

I have a server with 4 ethernet-cards. With the switching hardware I put all 4 cards in different VLANs. With the default networking on CoreOS I get single bridge for the containers, with a private IP ...
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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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198 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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44 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 ...