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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VirtualBox - guest bridged connection to host's eth0 fails

I have some weird issues (or lack of understanding) with my VM Lubuntu 14.04 on a Debian Jessie host using VirtualBox. My host has a static IP on its eth0 which is wired to a Raspberry Pi 2 (also with ...
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43 views

CentOS 6.7: cannot disable netfilter for Xen bridge

Following sysctl.conf settings at Xen host does not work: net.bridge.bridge-nf-call-arptables = 0 net.bridge.bridge-nf-call-ip6tables = 0 net.bridge.bridge-nf-call-iptables = 0 # sysctl -p ... ...
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33 views

Configure firewalld properly to access a subnet of docker containers from outside the host

Background I have a Fedora 22 Server running a docker daemon. For some reason, i want not to use the "docker0" subnet (which masquerades ip, and i do not want to change this), but my own bridged ...
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19 views

How to show AIX bridge settings

While Linux has "brctl show" command, I cannot find any similar for AIX. Question: How can we show AIX bridge settings?
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59 views

LXC Bridge not working on ubuntu 15.04

I'm trying to get lxc containers running with a bridged network connection so the container get ip addresses like the host does from a dhcp server. I red several tutorials, but I couldn't find one ...
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14 views

How to create wireless bridge connection with nmcli

Is it possible to create a wireless bridge connection (br0) for any wireless nic (wlan0) using nmcli tool.? End of the day system should have master bridge-connection(br0) that uses wlan0 nic as it's ...
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1answer
39 views

Install brctl for OpenWrt - which package?

I'm getting an error in OpenWRT Attitude Adjustment that says: -ash: brctl: not found when I run brctl addif br-lan mesh0 I tried: opkg update opkg install brctl But I got this error: ...
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1answer
40 views

How to get systemd-udevd to create a bridge device at start up?

I am running Ubuntu server 15.04 in a virtual machine. I am able to use the brctl program to create and manipulate networking bridges. I've decided to persist the setup (through reboots) by updating ...
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2answers
59 views

Do I want a Repeater or a Bridge? (OpenWrt)

I'm setting up a network with openwrt. I have a router that I have set up for wifi which I will use as an access point. I want to add another router to my network so that the two can exchange traffic ...
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30 views

Pinging between Mesh Network Nodes OpenWrt

I have two mesh nodes that I have configured to be on a mesh created using OpenWrt. I used the tutorial here to set that up. When I ran iw dev $MESH_IFACE station dump, I got the output that I ...
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38 views

Simultaneously operate on multiple wireless networks

I'm running an Ubuntu 14.04 server. For an experiment I'm running I have the following requirements: -Receive data from multiple (3-4) wireless networks. -Machines on a network will only need to ...
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1answer
71 views

Bridge and iptables postrouting

I have a Linux 3.14 PC with three NICs and a bridge between two of the NICs (eth1 and eth2). My Question Why is there no traffic passing through the POSTROUTING rule? FYI, traffic is passing ...
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26 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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189 views

Virtual Box Bridged network failed to get IP (DHCP) No DHCPOFFERS received

My goal is to get Bridged network working. When I try to UP interface in my Virtual Box VM, it tries some DHCPDISCOVER messages, but eventually I get No DHCPOFFERS received. I found where is the ...
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22 views

Traffic redirect, application that uses virtual bridge

I have an internet connection via ethernet interface that have an address 192.168.0.100. I have an applications that use internet connection using this interface. Like this: App1 -> 192.168.0.100 ...
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1answer
338 views

LXC external IP configuration for containers

I rent a dedicated server and want to use LXC instead of KVM. I want to buy IPs for every single container. For now i have two external IPs: 193.X.X.30/32 213.X.X.31/32 I prefer a routing solution ...
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1answer
116 views

Understand Linux kernel virtual bridge port numbering

I have a Linux kernel virtual bridge which contains interfaces eth1 and tap0: # brctl show br0 bridge name bridge id STP enabled interfaces br0 8000.00016c404fa3 ...
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2answers
129 views

Add virtual bridge without the loss of networking?

There is a dedicated server without KVM-over-IP support. The server 'owns' two IP addresses, and one of those is used for eth0 at the moment. The user needs to add a virtual bridge, in order to ...
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51 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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550 views

Cannot get IP address from WiFi access point (hostapd) with DHCP (dnsmasq) bridged with two ethernet adapters (bridge-utils)

My Android phone is trying to get DHCP address through WiFi connection, but fails. Obviously, I might have messed up something in my settings because I couldn't find a complete guide which would let ...
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100 views

Packets drops seen in physical interface while using kvm bridge

In ubuntu kvm hypervisor we are seeing packet drops in the physical interfaces once we create the bridge. Below is the output of ifconfig, br1 Link encap:Ethernet HWaddr xx:xx:xx:xx:xx:xx ...
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83 views

Creating an open wifi acess point for April Fool's Day which I want the client can only visit the login/splash page, but not working

I bought a Hiwifi J2 (Chinese) router, and sysupgraded to OpenWrt (not official version, but a patched version based on OpenWrt Barrier Breaker: https://github.com/rssnsj/openwrt-hc5761). Then ...
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1answer
87 views

multicast frames in Linux virtual-switch

I have a network topology where in "Dell PE860" runs a Linux virtual-switch br0: Now if I send an Ethernet frame to broadcast address from "IBM ThinkCentre": 17:10:23.569021 00:a1:ff:01:02:05 > ...
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1answer
1k views

Does Linux virtual bridge support VLAN's?

Does Linux virtual bridge(configured with for example ip or brctl) support VLAN's? For example configure access ports in different VLAN's and trunk ports with only certain VLAN's enabled. Only option ...
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79 views

eth0/usb0 bridge breaks after removal and replacing android phone

I'd like some help with a networking bridge issue I've run into. I'm trying to make a bridge with eth0 and usb0 (my android phone). After running the brctl commands the bridge works wonderfully. But ...
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1answer
216 views

How to understand virtual switch in Linux?

I have a following virtual Ethernet switch in Linux: root@vmhost:~# brctl show br0 bridge name bridge id STP enabled interfaces br0 8000.266b04c4a79a no ...
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1answer
243 views

CoreOS in Vagrant - interfaces

I'm trying to understand the networking model in CoreOS but I'm having trouble making the operating system bend to my will. The problem I'm facing is that I want to use weave as an overlay network ...
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45 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 ...
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125 views

Unable To Bridge Two Teamed Interfaces - Advice?

Before the wall of code I'll explain the situation. I'm trying to set up two interfaces to be teamed together, and from that team create a bridge. I've been studying for the RHCE and I believe this ...
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118 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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1answer
95 views

synproxy on a bridge

I am trying to implement synproxy to my firewall, on a bridge interface (between eth1 and eth2). Here are my rules: /usr/local/sbin/iptables -t raw -i PREROUTING -i br0 -m physdev --physdev-in eth1 ...
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How to find MAC or IP address of a device connected to the same Ethernet bridge?

I have the following topology: DeviceX ------ | DeviceX bridge with two Ethernet cards (created with bridge-utils) ---------------- router | ...
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1answer
38 views

Access network of PC2 from virtualbox installed on PC1

I am going to attend one seminar where I need to bring laptop with installed Virtualbox and Windows 7 running inside it. My laptop is too old to handle Virtualbox with Windows 7 and native Linux ...
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0answers
79 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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1answer
58 views

How can I have a bridge that uses DHCP?

I have set up a linux box (centos 7) to use for virtualizing some servers. I have set up a bridge, but I need to do it with DHCP, but it doesn't seem to like it. The reason I need DHCP is because ...
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220 views

default route of br0 gets dev eth0 instead of dev br0

On my LinuxMint laptop, i have a recurring problem with my bridge br0. On each start up, the default route does not work. The routing table uses eth0 instead of br0 probably because of dhcp. i roam ...
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1answer
1k views

Bridge does not get IP via DHCP at boot

I'm running CentOS 7. I'm not running NetworkManager, and I've actually uninstalled it. My system is supposed to acquire an IPv4 address via DHCP on br0 at boot. Howver, when I log in, it has no ...
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1answer
212 views

Wireless network bridge

I am trying to create a network bridge to allow virtual machines to use my wireless card to connect to my home network. My plan was to do something like: iw dev wlp12s0 set 4addr on brctl addbr ...
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235 views

Packets switched through Linux bridge have very high packet delay variation and latency? [closed]

I configured a very simple bridge under Debian Wheezy(kernel 3.2.0-4-686-pae). I simply created bridge interface with brctl addbr br0 and added interfaces eth1 and eth2 into this bridge with brctl ...
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101 views

linux vlan bridge feature backport to 2.6 kernels

The VLAN-aware bridge was introduced to the Linux mainline on the 3.x kernels, according to this article on lwn: VLAN filtering/VLAN aware bridge Has this feature been backported to the 2.x kernels ...
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391 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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1answer
77 views

How to count the number of interfaces in a bridge

I want to bring a bridge down only when the last port is removed and so I have this somewhat hokey check to do it brctl show looks awkward to parse to get the information out and doesn't feel much ...
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0answers
217 views

How to bridge a VM to public IP

I wish to to assign the IP from my eth1:2 to a VM; I also have no use of this IP for the host, it would be desirable to be exclusive to the VM. I've ended up with a setup just like this (eth1:1, ...
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1answer
77 views

Understanding linux Bridging

I have started learning networking and recently been through bridging in Linux. Bridge in Linux could be set in two ways as far as I have got by reading on internet i.e. either by bridge-utils ...
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43 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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3answers
132 views

Bridge/Router with custom logic

I've a Linux box with 3 network adapaters, which I'd like to configure as follow: Adapter A is connected to computer A Adapter B is connected to computer B Adapter C is connected to the Internet. ...
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1answer
113 views

trouble bridging tap0 and tap1

I have a GNS3 router that is connected to tap1 in my host. On the other hand, I have an user application connected to tap0 running locally in my host. I can ping both the router and my application. ...
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1answer
479 views

Allow multicast packages from the bridge to wire in KVM

On a CentOS 6.5 host, I have a couple of guests - Ubuntu 12.04 and CentOS 6.5. The Ubuntu guest is generating mcast traffic that is visible via a tcpdump on the br3 interface. It is also visible on ...
3
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1answer
250 views

Create virtual network adapter with own MAC and IP?

I have a server with 4 different IPs over one real NIC. Now i try to setup different virtual network adapter in debian with this IPs. The Problem is, that each IP needs also a specific MAC. Otherwise ...
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147 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 ...