A network bridge is a network device which transparently forwards packets between two or more network segments so that they appear as one local area network (LAN).

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How to bind an lxc container to a specific bridge?

I created a specific bridge br1 and would like to bind a specific container cont1 to that bridge. I have lxc and lxd installed, if that matters (I am not sure what the difference between them really ...
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213 views

To what extent does LXC manage configuring the network interface in a container?

In the LXC config file we can specify an IP address for a container: lxc.network.type=veth lxc.network.link=br0 lxc.network.ipv4 = 10.1.0.35/16 lxc.network.flags=up lxc.network.hwaddr= 00:16:3e:24:26:...
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164 views

Can't connect to Virtualbox VM's static IP which is in a different subnet from the hosts's IP, but statically routed to the host HW addr

I have a physical server running Ubuntu Trusty (14.04) at a data centre where they assigned one IP address, as well as a /28 block (16 IP addresses, 14 usable) from a different subnet. They said that ...
3
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919 views

Forward multicast between two LAN segments (Chromecast)

I've found some rules but most are inconclusive. Chromecast uses DIAL and discovers via multicast from what I've understood.. I have an Ethernet-connected computer which I would like to route via my ...
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109 views

Kali linux run airbase-ng along with wpa_supplicant

I have a notebook with installed kali linux with a built-in wireless card and I have also an external USB wireless adapter. I'm able to connect to networks with both of them, and I have no problems ...
2
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177 views

OpenWrt wifi bridge with IPv6

I am running OpenWrt 15.05 on my WDR4300. My ISP is via cable with legacy-IPv4-only. For IPv6 connectivity I use HE.net tunnel to receive a static IPv6 /64 subnet. My office is in a different room ...
2
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103 views

Permenantly Increase MTU for bridged interface on RHEL 7

I'm using RHEL 7 and need to increase the MTU of a bridged interface to 3000. The bridged interface (br0) only uses one physical NIC (em2). Within em2's network-script I have the lines: MTU=3000 ...
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2k views

Multiple virtual interfaces all bridged to eth0

I'm following this tutorial for setting up bridged a bridged Ethernet interface using uml-utilities and bridge-utils and it works for 2 interfaces but no more than 2. What I'm trying to achieve is ...
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324 views

Network in LXC not forwading through a bridge

I've got an LXC container, on the host I've got a bridge between the LXC container and eth0. The LXC container can ping it's Host 10.1.0.5, but can't ping the gateway of 10.1.0.2. The host is able to ...
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3k views

Using a bridge, an LXC container can't ping router, but the host OS can

I've got a virtual machine running under virtualbox, and in that virtual machine I've got an LXC container I'm trying to bridge to virtualbox's NAT interface: ------------- ----------- -----...
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20 views

Why I'm able to configure IP address on bridged interface?

Consider following bridge setup: brctl addbr mybridge brctl addif mybridge eth0 I see a lot of people failing their setup on configuring the IP on eth0 rather than the mybridge interface, so I was ...
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10 views

Configure firewallD to access services on bridge from OpenVPN

I have setup a KVM host using a routed bridge (interface br0) where the virtual machines are connected. I can reach services inside the VMs on the bridge from the KVM host without problems. I can ...
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28 views

Unknown bridge gets recreated after reboot on Ubuntu 15.04@VMWare

I am running Ubuntu 15.04 on VMWare. For the last couple of days I have the issue that I have a "magic" network bridge: I never created this bridge and therefore I tried to delete it with the ...
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60 views

qemu-system-arm problems adding second NIC/bridge

I am running Qemu under a host with two bridge interfaces and would simply like to bridge them to guest NICs. All of this works fine when bridging one NIC either by creating a bridge manually or using ...
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27 views

How to simulate a hub?

How can I simulate a hub on a Linux system? I know how to build bridge but I really need a hub behavior. My second solution is to use a bridge but I need to modify its behavior in order that it act as ...
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40 views

How do I specify an alternative bridge interface (not br0) when using qemu-bridge-helper

By following the instructions found at http://wiki.qemu.org/Features/HelperNetworking I can configure qemu with qemu-bridge-helper, however, I can't figure out how to pass a bridging interface option ...
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82 views

How to make an iproute2 bridge setup permanent?

I've set up an archlinux inside a Oracle Virtual Box. To be able to reach the VM from the LAN I have added a bridge adapter and configured the guest system following the instructions from the Arch ...
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29 views

Alter DST port on bridged traffic

I need to rewrite the UDP destination port on traffic which is only bridged/L2, but I could not match this traffic via iptables. This traffic isn't going through NAT chains (it could be matched in ...
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29 views

no arp entries for vnet

I have multiple kvm hypervisors (HV) which runs bunch of virtual machines (VM). Every HV has br0 and every VM is attached to it with its vnet interface. I noticed that one HV at arp -a shows me 2 ...
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44 views

Static ip for Virtualbox using bridge connection

I need to use the remoteapp on Ubuntu 14.04 using virtualbox running Win7. But the real problem is I can only access the remoteapp when connected to a wlan or eth using bridge network. Otherwise it ...
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40 views

Bridging two interfaces with iproute2 doesn't work

I'm trying to create a bridge between eth0 and eth1 with iproute2, but there's always the error: RTNETLINK answers: Operation not supported when I use the command:ip link add name br0 type bridge. ...
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75 views

Implement network bridge as userspace program?

I am looking to do some packet filtering/address rewriting for packets which are coming from and going to a lxc container. After some basic research, I figured the best way to do this is to assign a ...
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38 views

Filtering bridged packets by IP address

I am using a small Ubuntu 12.04 box as a Wi-Fi Access Point. The box has two interfaces which are bridged together as follows: brctl addbr br0 brctl stp br0 off brctl addif br0 wlan0 brctl addif br0 ...
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123 views

Debian Network 2 subnets one interface proxmox

I have a box that runs proxmox with a debian 7 base. It is virtualizing openvz venet VMs. The host node and all VMs are currently inside of the same /24 . I recently got a new subnet and wanted to be ...
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119 views

Linux Container LXC Intra Host Networking Issues

I have a problem that I cannot seem to resolve. I have two hosts M and N. A container in host M can ping the gateway, its host and all containers in Host N but cannot ping any co-hosted container in ...
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89 views

Outgoing masquerade address changes after adding a second interface to the bridge

In fact I have the following configuration: extrouter(192.168.1.1) <- wifi -> [eth2 (192.168.1.11) Centos 6/6 based host br0 (172.22.5.254)] br0 contains two tap interfaces (tap0/172.22.5.1 tap1/...
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180 views

OpenWRT on embedded device as firewall

I have the following setup in my network: My internet comes in through an ATT Uverse modem/router. The router is in bridge mode because that ATT Uverse modem/router connects to a second higher ...
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104 views

How to create a wireless-to-ethernet router?

I have a Debian machine, which I want to turn into a router. It will connect via wireless to a access-point, where it will get an IP. To its ethernet port, other machines will be connected. It will ...
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699 views

rp_filter dropping packets in linux bridges+vlan_tagged interface + tap interfaces configuration

I've a linux bridge which has it's first interface as a eth0.123 (VLAN tagged interface) & one or more tap interfaces created by kvm. (libvirt+kvm VM) [root@compute1 ~]# brctl show bridge name ...
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57 views

Bridging/Sharing a networkable printer in freebsd

I'm trying to "bridge" a ricoh laser printer to the rest of my network with a freebsd box, I have some other services running on there, such as mediatomb and have been using it as a file/media server. ...
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268 views

I have a firewall bridge in pfSense and I want to log only the allowed packet

I have a bridge0 which has members em0 (wan) and vge0 (lan) I connect via ssh on vge0, when I tcpdump -i pflog0 I get the blocked packets from the bridge0, but when I tcpdump -i bridge0 I get both ...
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99 views

No traffic tc class at bridge interface

I make bridge interface like this [root@]# brctl show bridge name bridge id STP enabled interfaces br67 8000.002655e38b20 no eth6 eth7 ...
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366 views

Bridging lxc vs virtualbox

Something that is confusing me is the difference between "bridging" with a Virtualbox VM, and an lxc container. When you start a start a VM, the VM creates a bridge ( apparently ) as a user. ...
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181 views

Problem with getting bridge to work when set up with a script

I'm trying to set up a bridge, essentially turning my machine into a switch. I'm running a dhcp server on the same machine with INTERFACES='br0' as the interface setting. /etc/network/interfaces ...
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915 views

iptables and physdev match confusion

I'd like to be able to prevent a network bridge from generating certain types of traffic from some of its interfaces. If I understand iptables correctly, packets generate by a device appear on the ...
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1k views

OpenWRT configuration when router is in bridged mode

I am planning on putting my Zyxel ADSL modem in bridged mode and use an OpenWRT router instead as the exit point from my local network. So, what protocol must have the Wan interface if the router is ...
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102 views

How to associate a seperate station to a Wifi AP

My Linux machine (A) is connected with some Wifi AP over my wireless device (wlan0). I want to give some other Linux machine (B), which is connected to me by ethernet (eth0), access to this network. I ...
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465 views

Wlan0 Static Ip bridge

EDIT: Even taking br0 out, still cannot get a static IP connection. I had the following /etc/network/interfaces configuration and it was working auto lo iface lo inet loopback auto eth0 iface etho ...
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20 views

Which ports to open in ufw for Windows in QEMU

I'm running Windows 7 in QEMU under Debian using bridge-networking. However when i have ufw enabled and start Windows i can not connect to the Internet. As soon as i disable ufw the virtual Windows-...
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0answers
60 views

Ubuntu Server in VMWare Fusion hangs on boot when using bridged networking

I am running Ubuntu Server 15.10 in VMWare Fusion Professional 8.1.0. All of my software is up to date. I need to configure the virtual machine to bridge to my Mac's network so that the client OS's ...
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0answers
16 views

Is it possible to setup a bridge configuration where only the host can access a VM, but not the other way around and no VM->VM?

I have a KVM hypervisor set up with several VMs. A docker instance runs in each of them (for security purposes the containers shouldn't run on bare metal next to each other). Is it possible to ...
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0answers
31 views

How to visualize bridge and port connections in Linux?

I have complex setup of Linux bridges, OVS bridges, veths pairs etc in a Debian host. Is there a tool that will produce a image of which is connected to what and which port's traffic is egressed ...
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0answers
17 views

What are the consequences of adding a network interface to a bridge?

Context: I have a headless computer/server with 2 network interfaces (e.g. eth0, eth1) running CentOS 7. eth0 faces the world/Internet. A laptop is connected to eth1, and accessing the internet ...
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28 views

Bridge Linux Disconnecting Link Port

We have a problem with a Linux Bridge working as a Firewall. Sometimes one link is disconnected suddenly without explanation and we have port flapping for a long period of time. Logs from the machine ...
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67 views

Setup a WLAN to LAN bridge (fedora 22)

I would like my computer to (sometimes) act like network bridge. Meaning, when connected to my wifi, I'd like to connect another client (or even switch) to my lan port. (DHCP and NAT enabled, only ...
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25 views

Create a bridged interface like VirtualBox

When I createa a VirtualBox VM with Bridged Network (manually specifying which interface to bridge into) my VM gets IP address from the DHCP server in my LAN. How is this interface created? I want to ...
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16 views

Do I get the exact same tcpdump output if I use bond or bridge?

I need to get the tcpdump output. I was unable to set up a bridge but I could set up a bond. Does it matter which one I use when looking at the output of a tcpdump?
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136 views

Errors with bridged interfaces

I have problem with Debian running as a VirtualBox Guest. I can set up a bridge but it flood the logs with a lot of errors and system becomes unusable. Errors such as: Nov 12 16:30:55 jessie-gnome ...
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84 views

How to bridge a wireless interface with another wireless interface (both on the same computer)?

Basically I am trying to accomplish the following setup - wireless internet ---> wlan0 of Ubuntu computer "bridged to" wlan1 of same Ubuntu computer ---> device with wifi The reason for this setup ...
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29 views

DEBIAN connect eth0 do bridged device

I am new in Linux. But I need connect my NTB to bridged device. I connect my NTB to device with ethernet cable and eth0 interface in Debian(kali 2.0). Schema Wifi AP----------wireless----------Wlan/...