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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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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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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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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1answer
26 views

Why must the IP be configured on the bridge device? [on hold]

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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About vlans and subnets [closed]

I have a PLEX server I would like my father in law (who lives across the street from me) to be able to access. He has his own internet/network(192.168.0/24) setup, so I got a wireless range extender ...
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0answers
16 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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0answers
7 views

guest wifi with Hostapd [closed]

Hi i'm using Hostapd with the following config. wlan0 bridge to br0 and getting a dhcp from my router (range 192.168.2.1-100) wlan0_0 also bridge to br0 and getting dhcp from dnsmasq (range ...
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47 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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1answer
1k views

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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23 views

Can't figure out how to configure a dedicated server for VPS creation [closed]

My goal is to set up my dedicated server for easy management of virtual machines. I have a dedicated server running CentOS 7 minimal, a fresh install. I've installed Virtualizor I've changed the ...
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17 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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29 views

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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0answers
10 views

Guest as Virtual machine connection to Host [migrated]

I have guest run on my machine on qemu with configuration: /usr/local/kvm/bin/qemu-system-x86_64 -enable-kvm -cpu host -smp 8 -hda ${TEST_VIRT_ENV_IMAGE} -m 4096 -netdev user,id=user.0 -device ...
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0answers
35 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
324 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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12 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 ...
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1answer
64 views

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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1answer
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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17 views

Bridge interfaces without IP in Debian

I need to bridge 2 VLAN's on some different interfaces without IP address. How i can do this? auto eth4 iface eth4 inet manual up ifconfig eth4 up mtu 9000 auto eth4.1320 iface ...
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1answer
64 views

Bridging multiple VLANs in linux

I'd like to clarify some issues I have with bridging tagged traffic on Linux machine. I have a 2.6.20 (802.1q, bridging, ebtables are enabled) kernel and a device with two net interfaces (eth0 and ...
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1answer
1k 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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1answer
137 views

Debian Bridge Network Connection — Static IP Addresses

I have a PC with 3 Ethernet ports. I am able to share internet to the other two ports with internet coming in on eth1. I use the following setup on /etc/network/interfaces after aptitude bridge-utils ...
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47 views

Make lan ip's available to external devices over openvpn [closed]

My goal is to make my home media library available to external devices. External device ====== OpenVPN Server ====== unknown Modem ----- OpenWRT --- lan machines External devices are OpenVPN ...
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21 views

ebtables captive portal bridge vlan

http://s16.postimg.org/e5nu6g1md/bridgevlancaptive.png Attached link image is based on my project about captive portal. As you can see on the image i have diagram on LEFT side which is WORKING ...
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72 views

Debian 7 (Proxmox 3.4-1) Venet IPV4/6 & IPV4 Bridge

I recently have been trying to get IPV4/6 working in my openvz containers (by venet) and as of now I have got them up (through trial/error and other data sources that I dont even recall at this ...
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1answer
91 views

Filter mirrored port traffic using iptables

I receive traffic from a mirrored port and I would like to send it into an NFQUEUE for processing. Because of the mirrored port, the packets destination MAC addresses are not my host MAC address. ...
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2answers
44 views

Is there a way to query all the mac addresses in a network?

I know this question was flagged "off-topic" and "non-professional", but when creating a gateway or IDS, this might be quite relevant. Also, Google finds nothing usable... There is a thing called ...
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1answer
96 views

Qemu Proxmox VM - Network access to guests for BackupPC backups

Environment I rent a dedicated server from OVH and installed Proxmox 3.3 (which is based on Debian 6 Wheezy) in order to create and manage multiple Virtual Machines on it. Each VM is configured to ...
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18 views

Automatically activating bridge slave connections

I created a bridge connection in the NetworkManager applet and assigned two ethernet interfaces to it. When I click connect on the bridge connection, the setup halts at "Obtaining network address" ...
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47 views

What does the @ means in ip link show command?

I am new to Linux network admin. I was learning the ip commands with one of my colleague's server with ip link command. When I try to show to one of the vlan information, I see this: vlan1@eth1: ...
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Creating a private network for two VMs

I am trying to create two VMs which are both connected to the same private network. I'm using Linux with qemu-kvm 1.0. My plan of attack has been this: brctl addbr bridge ifconfig bridge up tunctl ...
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STP fixes non-looped network. Dumb switches kill network. Can anyone decipher this wireshark readout for me?

Greets long story short we had a power outage here and when the network came back online it would crash out to a flood of ARP requests. This would lead to packet storm/network loop, but after ...
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2answers
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Enabling bridged connections with a single network card with multiple IP addresses

I have a server with one network card in it (eth1). My server is assigned 5 public IP addresses and it is currently configured like this (/etc/network/interfaces): # The primary network interface ...
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1answer
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Can a single physical interface act as a “slave” for multiple bridge interfaces?

Can a single physical interface act as “slave” for multiple bridge interfaces? For example, br0 and br1 would use eno1 physical. Got KVM host with 4 physical nics, each nic assigned to a different ...
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1answer
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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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Network bridging - what's the point?

I'm having hard time trying to understand how bridges work. What's the idea behind them? Most sources say their main role as connecting two LANs. They are layer two devices. But wait a second, how can ...
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3answers
963 views

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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247 views

CentOS 6.6 - Additional public IP through aliasing in VM with bridged network

The scenario: A CentOS 6.6 virtual machine with a working public IP assigned to its eth0 via bridged networking (details about the setup below). The problem: I would like to add an additional public ...
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57 views

Bridging two datacenters

i need to find out what would be best way to bridge current datecenter with new DR datacenter. I have following network configuration (show in picture). http://i.imgur.com/7bohb3I.jpg So on internal ...
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ARP replies contain wrong MAC address

I've got a robot running linux with wired and wireless adapters. When I boot up, it connects to the wireless fine. When I assign an IP to the wired (either statically or with DHCP), it looks like it ...
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0answers
52 views

Cisco vpn access to another router

I am using a Cisco ASA 5505 to VPN into my network (which is working great), and I want to connect to a different network that is on a Asus RT-N66v. For example: network 10.1.1.1 is my VPN and ...
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2answers
545 views

Network-Manager with bridge interface and OpenVPN

I'm running Debian Wheezy with Gnome-Shell. My current network interface configuration is this: # The loopback network interface auto lo iface lo inet loopback # The primary network interface ...
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1answer
175 views

ubuntu route all client eth0 traffic to openvpn on client tun0

OpenVPN client has 2 physical interfaces: eth0 = 192.168.10.14/24 gw 192.168.10.1 eth1 = 192.168.10.17/24 gw 192.168.10.1 tun0 = 172.160.1.6/24 gw 172.16.1.5 Server is external somewhere listening ...
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1answer
168 views

How can I block all traffic to/from an bridged interface while allowing DHCP?

I have a PC (running Fedora 20) that is being used as a "software switch" to control the network connectivity of some external devices. There are eight such devices; the PC has two 4-port Ethernet ...
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1answer
3k views

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. ...
2
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1answer
862 views

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 ...
0
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1answer
77 views

how to make this bridge to work?

I have posted a similar question at: http://stackoverflow.com/questions/27873819/customising-docker-network-doesnt-work# To simplify the question, let me get rid of docker. This is the network ...
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0answers
88 views

nftables, bridge, lxc. Can't call into container

My first post so bear with me. I am using nftables to start to replace old ones. I am loving it, but obviously, my approach is a bit iptables-like and also highly procedural, rather than using the ...
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1answer
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Bridge behavior when MAC address is not found

Lets say, a uni-cast packet is sent from one system to another system. The packet passes goes to the bridge. But the bridge does not have any information about the MAC address of the destination. What ...