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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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 ...
2
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1answer
46 views

Bridge interface across VMs to allow lan VM internet access

Is it possible to bridge interfaces across VMs? I have three VMs with the following setup: VM1 eth0: public ip eth0:0 private lan ip 172.22.xx.x1 VM2 eth0 no ip eth0:0 private lan ip ...
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0answers
24 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 ...
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32 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 ...
2
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0answers
81 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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0answers
96 views

Centos 6 KVM network problem

I have a Centos 6 KVM host. I installed the KVM following this manual: https://wiki.centos.org/HowTos/KVM Its network has been configured as a bridge: [root@server ~]# ifconfig br0 Link ...
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0answers
25 views

Virtual nics and dhcp testing

I need to conduct some testing and want to create 2 virtual network interfaces in Linux and bridge these to a physical nic. I need to test sending specific dhcp client parameters to a dhcp server on ...
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0answers
608 views

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 ...
0
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1answer
234 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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0answers
182 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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1answer
28 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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1answer
361 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 ...
0
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1answer
99 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 ...
0
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1answer
408 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
189 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 ...
3
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2answers
2k 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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2answers
189 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 ...
0
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1answer
135 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
230 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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0answers
112 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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0answers
27 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 ...
2
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1answer
1k 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 ...
6
votes
1answer
249 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 ...
2
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2answers
399 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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113 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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2k 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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1answer
227 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 > ...
3
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1answer
4k 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 ...
0
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1answer
965 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 ...
0
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1answer
372 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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77 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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1answer
251 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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0answers
173 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 ...
0
votes
1answer
157 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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2answers
4k views

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 | ...
1
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1answer
44 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
102 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 ...
1
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1answer
112 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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581 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 ...
3
votes
1answer
3k 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 ...
2
votes
1answer
581 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 ...
2
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0answers
371 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 ...
0
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0answers
135 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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0answers
673 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 ...
2
votes
1answer
170 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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387 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, ...
0
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1answer
96 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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0answers
56 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. ...
2
votes
3answers
158 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. ...
0
votes
1answer
188 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. ...