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.

learn more… | top users | synonyms (1)

1
vote
2answers
2k views

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 ...
1
vote
2answers
489 views

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 ...
1
vote
1answer
2k views

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 ...
1
vote
2answers
2k views

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 ...
1
vote
1answer
962 views

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 ...
1
vote
1answer
93 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: ...
1
vote
1answer
864 views

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 ...
1
vote
2answers
306 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 ...
1
vote
1answer
686 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 ...
1
vote
2answers
2k views

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 ...
1
vote
2answers
463 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 ...
1
vote
3answers
1k views

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 ...
1
vote
2answers
128 views

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 ...
1
vote
2answers
996 views

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 ...
1
vote
2answers
1k views

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 ...
1
vote
2answers
111 views

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 ...
1
vote
1answer
1k views

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 ...
1
vote
3answers
692 views

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] ...
1
vote
1answer
965 views

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 ...
1
vote
2answers
2k views

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. ...
1
vote
1answer
1k views

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 ...
1
vote
1answer
2k views

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 ...
1
vote
1answer
950 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 ...
1
vote
2answers
724 views

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 ...
1
vote
2answers
190 views

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 ...
1
vote
1answer
3k views

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 ...
1
vote
1answer
595 views

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; ...
1
vote
1answer
1k views

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 ...
1
vote
1answer
1k views

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 ...
1
vote
1answer
879 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 ...
1
vote
3answers
472 views

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 ...
1
vote
1answer
140 views

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. ...
1
vote
1answer
1k views

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 ...
1
vote
1answer
142 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 ...
1
vote
1answer
151 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 ...
1
vote
1answer
39 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? ...
1
vote
2answers
605 views

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 ...
1
vote
1answer
531 views

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 ...
1
vote
1answer
313 views

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 ...
1
vote
1answer
873 views

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 ...
1
vote
1answer
644 views

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 ...
1
vote
2answers
193 views

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" ...
1
vote
1answer
367 views

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 ...
1
vote
1answer
2k views

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 ...
1
vote
2answers
338 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 ...
1
vote
2answers
462 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 ...
1
vote
2answers
1k views

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 ...
1
vote
1answer
204 views

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 ...
1
vote
1answer
1k views

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 ...
1
vote
1answer
106 views

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 ...