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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Guest networking not working on Debian Jessie Host server KVM with br0 bridged network

GUESTS networking not working at all. In other words guest can not ping host or lan gateway. I have br0 bridge already created, also brctl show that vnet0 was properly added by KVM to br0 on guest ...
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2k views

Assign ipv6 address to KVM guests on bridge mode

System: CentOS 6.5 Network: Bridge on br0 IPv6: ISP Native /64 block. IPv4: ISP address (not internal LAN) Purpose: To assign IPv6 only to guests (manually), I don't want ipv4 address to be ...
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Ipv6 over bridged network stops working after some time (Ubuntu LXC)

i hope you can help me. I am running several Linux Containers on a bare metal server which is provided with an Global Ipv6 address as well as an 64-bit network by my provider. I have configured IPv6 ...
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Setting up Bridge

I'll be setting up a bridge network for kvm in CentOS 7. The thing is the server will be relocated to a new office in a few weeks, but I need to get it up and running now. I don't know if our ...
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13 views

DSL modem in bridge mode but router not accessible from the internet

I have a DLink ADSL modem which I have put into bridge mode and connected to a Fortigate 200A firewall. The Fortigate is able to connect through PPPoE and receives the static public IP. I can browse ...
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2answers
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ARP reply vanishes from br0 to tap0 using OpenVPN in bridging mode

I have setup a linux box (on an esxi5) which acts as an OpenVPN server. the server is configured to use bridging for the clients, which essentially works, with one exception. If the client pings some ...
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1answer
2k views

tap interfaces always disabled in linux bridge

I have a physical interface eth0, and I want to create two virtual interfaces and bridge them with eth0. For this purpose I do: #Create the virtual interfaces tunctl -t tap0 tunctl -t tap1 ifconfig ...
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2answers
26 views

Add a network bridge to Ubuntu and lost internet and lan connection

I'm trying to make network bridging to work on a Ubuntu 15.04 (I'm experimenting in order to make a QEMU/KVM virtual machine that will be visible to the outside network as if it were a distinct ...
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1answer
181 views

How to use the same IP for dom0 and one domU in XEN

I have currently a Xen on a debian wheezy dom0. I have 6 (public) ips and I would like to setup 6 VMs (each using one IP). To keep access to dom0, I'd like dom0 ssh to bind on one IP port (lets say ...
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19 views

How can I bridge an HTTP server from an interface to another in Linux?

In a Linux server I have an HTTP server that's available at eth1 with ip1, and I want to make it available to the network in eth2 with ip2. How can I do this? Example: I have an http server on ...
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2answers
40 views

Is there any disadvantage to putting a modem in bridge mode

In order to prevent the need of port forwarding and double natting I plan to put a modem into bridge mode. Are there any side effects or problems that could come of placing a modem into bridge mode in ...
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26 views

Creating several kvm bridges over tagged bond

I have the following configuration in a RHEL6.5 which works great. # ifcfg-em1_2 DEVICE=em1_2 HWADDR=C8:1F:66:D8:77:D2 TYPE=Ethernet ONBOOT=yes NM_CONTROLLED=no MASTER=bond0 SLAVE=yes USERCTL=no ...
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2answers
726 views

wireless ethernet adapter with EAP-PEAP? [closed]

We have a wireless network set up to support WPA or WPA2 with AES or TKIP encryption and EAP-PEAP authentication. Users are wanting to connect devices that don't have the ability to do EAP-PEAP but ...
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1answer
44 views

VMWare ESXI vNetworking - vSwitches bridged by multiple multiple Layer 2 bridge hosts

I want to create a multi-VM pfsense cluster ESXI. For those that are not familiar with pfsense, consider it a Free BSD based router/switch (with many features on top of it, but not necessary for this ...
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2answers
136 views

Linux Routing with two NICs (LAN vs Internet) with NAT and bridging for VMs

My Setup: There is only one physical machine in this setup, a Host System for Virtual Machines (VMs) with two network adapters. One NIC (eth0) is connected to an internal network (LAN subnet, e.g. ...
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1answer
33 views

Setting up site-to-site IPsec in bridged mode

I'd like to set up site-to-site IPsec in bridged mode: that is, where the hosts in each site don't need to be modified to use the IPsec gateway, but the IPsec gateway acts as a pseudowire. My plan to ...
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1answer
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Xen Vif creation xl vs xm

Hi everyone, I switch my server from a xend/xm Xen install to a 4.1 xl Xen install. Therefore Xen does not create vif network interface when I launch xl create /etc/xen/my_server.cfg but does create ...
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24 views

Make LXC containers directly accessable with ipv6

First off I have a special IPv6 address allocated to my dedicated server, just 1. A ::1/128 one. But I can assign addresses to eth0 (eg ::2/128, ::3/128, etc). Now I would like to run LXC containers ...
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1answer
65 views

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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1answer
2k views

KVM guests lose connectivity after networking restart

we're setting up an ubuntu server 10.04 host with kvm. The host is setup with a bond and bridged interfaces to allow the guests access to the network without natting. Our current configuration is ...
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2answers
166 views

Routing from docker containers using a different physical network interface and default gateway

Background Information I have a server with two network interfaces that is running Docker. Docker, like some virtualization tools, creates a Linux bridge interface called docker0. This interface is ...
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56 views

Create Bridge interface on linux board

My current configuration and topology look like below: +++++++++++++++++++++++++++++++++ +++++++++++++++ | Linux Board eth0 | | Switch | | with openWRT ...
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0answers
29 views

Connecting a switch to a VDSL2 model causes upload speeds to go to 0

My network configuration has my main router connected to a secondary router which is in bridge mode, and I have a computer connected via ethernet to that secondary router. If the connection between ...
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1answer
90 views

cannot ping linux network namespace within the same subnet

Here is a quick summary of the issue. I cannot communicate with a linux network namespace within the same subnet. I am running Ubuntu 14.04.1 LTS on a headless server. I have been troubleshooting this ...
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1answer
24 views

How to configure bridging

I am trying to configure a bridged network in a CentOS machine created with virtual box. I already did the same on two ubuntu 12.04 machines, and this is how the /etc/network/interfaces file looks ...
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3answers
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VMWare networking mode (NAT or Bridged)?

I am running Windows 7 within a virtual Machine from my Mac. I use Windows 7 for Visual Studio primarily and also to host a dev install of IIS. There are two things I need and I am not sure what ...
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1answer
143 views

docker0 bridge status toggles between enabled/disabled, what could be causing that?

I have some CoreOS bare metal instances that are displaying unusual behaviour on the docker0 bridge device. On one of the instances where this has been occurring, I'm running couchbase server and it ...
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1answer
71 views

Unable to set a bridge over bonding on Debian

I have a Debian 8 Jessie machine with two interfaces (eth0 and eth1) bonded in balance-rr mode (aka 0). It works smoothly, but when I try to set up a bridge on it, it doesn't work. My ...
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2answers
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Bridging LXC containers to host eth0 so they can have a public IP

UPDATE: I found the solution there: http://www.linuxfoundation.org/collaborate/workgroups/networking/bridge#No_traffic_gets_trough_.28except_ARP_and_STP.29 # cd /proc/sys/net/bridge # ls ...
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1answer
71 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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1answer
25 views

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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107 views

Trouble understanding how to setup network Bridge on Ubuntu 14.04.2 to act as a web content filter

I am trying to build an Ubuntu server to act as a web content filter, using Squidguard and Dansguardian. There are great resources such as this: ...
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1answer
159 views

openbsd pf squid transparent proxy using a bridge

I want to use OpenBSD 5.7 as a filtering bridge in front of my router, and as part of that run a transparent proxy (squid 3.5.1) to manage web access. I have set up the openbsd machine as a bridge, ...
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0answers
25 views

Centos7 Network Bridge: ServerA -> VPN - > ServerB -> Internet

The core of the problem is that I want to install mariadb on ServerA (which has no internet connection). ServerB can connect to ServerA via VPN. ServerB has internet access. Until now I've 'got by' by ...
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0answers
14 views

Separate bridge for each VM?

I have been experimenting with network settings ever since I got a new dedicated server for some root-started unprivileged LXC containers a few months back and have finally arrived at what might be a ...
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0answers
56 views

Xen: network between dom0 and domU does not working, while network between particular domUs does

I am unable to establish communication between domU and dom0. I have two domUs and they are able communicate between each other. Dom0 is connected to Internet. I just need network between dom0 and ...
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0answers
36 views

Add a second bridge to a virtual machine

We have a ubuntu-12.04 host running another ubuntu-12.04 virtual machine with kvm virtualization and bridged network interface on eth4. This network allows the virtual machine access to the outside ...
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2answers
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On Mikrotik RouterOS, is it possible to get Netflow information from a bridged connection?

I have a RouterOS box set up to bridge two ethernet connections. I have use-ip-firewall=yes in the bridge configuration, so that the ports go through the firewall. I've enabled netflow reporting via ...
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1answer
63 views

Problems simulating bridge with OpenWRT virtualbox

I have setup a BarrierBreaker OpenWRT instance in virtualbox. WAN is NAT adapter LAN is internal network I have attempted to bridge these interfaces as I wish to start learning ebtables. However ...
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45 views

How to setup 2 switch with VLAN and 2 IPs for each in different block

Below I have depicted the required network. In this network: Lets say GW1 is in IP1 block and GW2 is in IP2 block. There are 2 Linux running PCs with 4 NICs. 1st Linux PC is connected to 2 GWs with ...
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1answer
1k views

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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1answer
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Why must the IP be configured on the bridge device? [closed]

My understanding of a network bridge is having a kind of "virtual switch" which virtually connects the network devices (that were added to the bridge) as if I would connect them to a real switch with ...
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3answers
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Bridging wlan0 to eth0

On arch Linux, I would like to mainly have eth0 (connected to bridged router) share the connection recieved from wlan0, Ive read tutorials but I'm not command sabby as other users are and don't ...
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0answers
115 views

How do I connect a SoftEther bridge to a server without getting an authentication error?

I've been playing around with SoftEther, and I'm trying to use the VPNCMD utility to create a site to site VPN. However, when I try to get the Cascade connection up between the bridge and the server, ...
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247 views

Bridge on vlan on teaming for KVM

I have problem to create bridge on vlan on teaming. Why I do something like that? - Kvm needs bridge - Vlans because I need vm’s in different subnets - Teaming in option active-backup (small HA) I do ...
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88 views

Setting up veth in proxmox

I have recently taken over an openvz stack from an admin that left, and I am having problems with veth interfaces. There are 3 CTs using the bridge vmbr0 in the stack, with their own public IP ...
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Trunk vlans inside openvz container (Proxmox)

I have a node running OpenVZ CT (ProxMox). eth1 on HN are bridged through vmbr1 to veth device on CT101 (eth1 inside container). (Host Node) eth1 -> vmbr1 <- veth101.1 <- eth1 (CT101) No ...
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205 views

Xen VM won't come up: could not find bridge device xenbr0 (configured to use routed)

I am using xen 4.4.1 on an Ubuntu 14.04 server, my DomU is running Ubuntu 14.04 Server as well. I've run this DomU in bridge-mode previously no problems. However I want to switch to a routed setup. I ...
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1answer
368 views

Ping (DUP) with Linux bridges and tap devices

http://imgur.com/qPoy2QJ I have two Linux (Ubuntu 12.04) VM (running on KVM) that networked together using two Linux bridges as shown above. The network interfaces are Linux TAP devices. The problem ...
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25 views

Debian Linux Bridge Mode not forwarding

I am trying to bridge lan adaptor eth0 with the eth1 interface exposed by sierra wireless lte modem. When i create a bridge using the following commands brctl addbr br0 brctl addif br0 eth0 eth1 then ...