Questions about configuring and using bridging interfaces

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24 views

Looking for network surveillance tool

I sometimes use / test software that cannot be found in the apt tree. The software comes from all over the internet. When executing the software I create an extra user for this particular software and ...
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10 views

create range dhcp and give guest static IP adress

Hi i need some help with setting up my ip-addresses for my vm guest and im kinda lost here. To make it more clear for me lets say i have 10 ip-addresses (192.168.1.0 till 192.168.1.10) and i want to ...
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12 views

Bridging two networks: access to bridge slow and unreliable

I have a LAN that connects local computers, and in addition I have a dedicated connection to an overseas network with a static IP address assigned for my use. An ubuntu (14.04.01LTS) box with two ...
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13 views

Pass LLDP frames through a bridge instead of consuming them

In Ubuntu 14.04, is it possible to pass LLDP frames through a bridge instead of consuming them? I know that technically, this is against the IEEE LLDP spec, but I still want to do it. For example, ...
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28 views

Correct way to create VLAN and Bridges on Ubuntu14.04?

When I tried to create VLANs and Bridges on Ubuntu 14.04 as following, network connection is always lost on it, what's the problem? Note that the if I only set em1(no em1.100, cloudbr0 and cloudbr1) ...
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10 views

setting up slip interface

I have FTDI serial converter device connected to the usb port of my machine , I want to create a slip interface between the serial device and the virtual network interface (something like tunslip). I ...
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47 views

bridge interface br0 for virt-manager removing IP from em1

I am trying to create a bridge interface for virt-manager to boot PXE images from network. My actual network in em1 (I don't have an eth0 iface). em1 have 172.16.20.x IP. I prefer the bridge IP to be ...
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124 views

Unable to Bridge wlan0 to Win7 guest with U14.04 host on Virtualbox

I am following the simple guide here, but am unable to bridge my wireless adapter and connect in Virtualbox. My host is Ubuntu 14.04, guest is Windows 7, and I am using VirtualBox 4.3.10 (latest ...
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1answer
27 views

connect to a virtual machine remotely

I create a server in my virtual machine in ubuntu. But I can connect to it only from my machine. I can not connect to my virtual machine from outside computer which was in same LAN. When I search ...
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173 views

bridge vs iptables vs route?

iptables vs bridge-utils vs route I have two network cards in a Linux server and don't know how to make them communicate. After searching a lot I still don't know which method is the one that should ...
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1answer
361 views

Ubuntu 14.04 wireless network setup

I am trying to setup kvm on my laptop. These are the steps I have done so far. Uninstalled existing windows7 and installed Ubuntu 14.04 on the laptop. I have a network which provides me wireless ...
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1answer
26 views

isc-dhcp for Virtual Machines only

I installed Xen 4.3 on Ubuntu Server 14.04 and added the xenbr0 bridge. The host IP is 145.173.136.2. The network administrator reserved 15 IP's for the VMs: 145.173.136.112-126 So i installed the ...
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2answers
238 views

Ubuntu 14.04 Server operated as a WIFI-LAN-Router drops packets between LAN and WIFI

I would like beeing able to exchange packets between WIFI and LAN. My Ubuntu 14.04 Server operated as a lan-wifi-router has two physical Ethernet Ports (p4p1 and p5p1) as well as a WIFI Module ...
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0answers
363 views

LXC container no outgoing traffic with bridged network and public IP address

I try to setup a LXC container with bridged network on ubuntu 14.04.1, but the outgoing traffic seems to be blocked. Ping another IP than the container's one is not working. Actually I tried this with ...
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58 views

Why must write 'br0' in route table to restore host's Internet connection?(with QEMU & Tap)

That's a long story.... But at first, I have to confess that my reputation is less than 15 so I can't give you a '+1'. I need to set up several QEMU instances. One of them is a primary node, which ...
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757 views

network-manager, bridge and vpn

I have a shiny new system with Ubuntu 14.04 and I'm trying to get something configured which I think is reasonably simple: a bridge (br0) for KVM ability to use a VPN network-manager controlling it ...
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52 views

Bridged VM guest does not get IPv6 ra prefix from host

I have a similar problem and setup as described in IPv6 does not work over bridge. My host get a IPv6 prefix but the guest VM only gets a local fe80-prefix. Using tcpdump I can see that solicit ...
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1answer
172 views

Multiple interface devices for KVM bridging

I have a server that I'm trying to virtualize with KVM. I'm trying to use a network bridge so that my KVM guests can have external IPs. Every time I create a bridge brctl addbr br0 brctl addif br0 ...
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1answer
131 views

iSCSI + br0 bridge + 14.04.1 Server = does not work

On one of my servers I have: USB 4GB: 1) EFI partition 2) /boot partition iSCSI 50GB (on another fileserver): 3) / partition In /etc/network/interfaces it works flawlessly if I have: auto p3p1 ...
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102 views

Layer 2 Bridge with Tap Interface

Linux newb starting out. Figuring it all out as I go along. Im trying to layer 2 bridge a virtual tap interface and an etehrnet interface. want to achieve this. Tap0 10.0.0.3/8 =====> Br0 (Layer 2 ...
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15 views

Can we add ports to OVS AFTER the VM is created?

I wanted to write up a program where I can create VMs first using libvirt. Initially they would not be added to any network. Then I want them to be attached to an OVS bridge where I can specify the ...
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1answer
75 views

Network Bridge Over a Subnet

I am trying to figure out how to make a flat network by bridging over a subnet using 2 Ubuntu guests so that everything in the other subnets can talk to each other without restriction. Configuration ...
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98 views

ubuntu vm on open nebula doesn't se internet connection

I have some problem with ubuntu and open nebula. I'm trying to setup one installation of ubuntu on open nebula. Start from this assumption: my machine as an i7 with 16 GB of ram and runs ubuntu ...
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72 views

Link aggregation on a LXC bridge

I'm working on a server with a number of various interfaces (eth0-3) and I currently just use one for both host traffic and another for my LXC bridges traffic. Since I have a few spare ports just ...
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0answers
376 views

Ubuntu 14.04: with bridge on wlan, no internet on kvm guests

I'm trying to be a "high-lander" sticking to KVM plus virt-manager to manage my VMs. But it's about a week I'm around trying to create a bridge that works for using with my VMs. I tried first tried ...
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109 views

LXC bridging with two NICs

I am setting up a server to host a number of LXC containers, for now just isolating web and db services. The server I am using has two NICs and I'd like to use one for host traffic and one for ...
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98 views

url_helper.py warning cannot route to host. Ubuntu Server

When booting a Node Via PXE i keep getting url_helper.py[warning] saying it cant route to host, My Master Node/Controller has 2 interfaces. 1 for nodes, 2 internet access. What can i do to allow the ...
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26 views

Network access impossible using bridge mode

I installed Ubuntu 12.04 LTS as a VM on VirtualBox. I activated only the first adapter to use the bridge mode. Once logged into Ubuntu, I can not ping 8.8.8.8 With the NAT mode, I access Internet ...
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1answer
46 views

Two network interfaces use for up and down

I've setup Ubuntu Server 14.04 as a virtual machine using vSphere. When I created the machine I set it up with 2 network cards. Is it possible to set one as a download interface and another as ...
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192 views

No internet access through bridged wireless connection in VirtualBox

I have Windows 7 installed in VirtualBox on Ubuntu 14.04. This is on a laptop so I have to networking adapters. The ethernet adapter works fine regardless of connection type. Wireless only works in ...
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40 views

Adding static MAC entry to a bridge

Is there a way to add a static MAC entry in a linux bridge against a certain port X? i.e. I know that the MAC in question resides behind port X and it will not be learnt for a while (assuming unidir ...
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15 views

netfilter's function nfq_get_outdev_name()

I'm trying to figure out what the interface of a packet is using Netfilter linux library on Ubuntu 12.04. One of my interfaces is a LAN (eth0), and the other one is connected to a router (that I've ...
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1k views

Creating bridge from wlan to ethernet

I know there is lot of threads about bridges and how to make them and manage them but still i haven't reached a goal. So i need bridge between wlan and ethernet but mean while i need connect to ...
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1answer
130 views

Setting up VMs on different subnets

I run a server on IP X.Y.3.7 and i want to run multiple VMs on it using libvirt. I set up a bridge device: auto eth0 iface eth0 inet manual auto br0 iface br0 inet static address X.Y.3.7 ...
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22 views

Trill for Ubuntu

I have a project on testing trill but I do not have the equipement that supports it (like Cisco Nexus) so I was wondering if there is an opensource version that I could install on Ubuntu. I found ...
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1answer
124 views

A question about the Internet/ConnectionSharing (NAT) via iptables

I'm following this tutorial to setup a NAT gateway: https://help.ubuntu.com/community/Internet/ConnectionSharing#Ubuntu_Internet_Gateway_Method_.28iptables.29 With simple eth0 as WAN and eth1 as LAN ...
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2answers
681 views

IPv6 does not work over bridge

I installed Ubuntu 14.04 server a week ago. I use it as a virtual machine host (tasksel installed). meaning am running it with kvm + libvirt. I have set up the same bridge I had in 13.10. auto p4p1 ...
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1answer
3k views

VirtualBox - How to connect LAN computers to Windows XP Guest

I have software in a Windows XP Guest that acts as a server. I need to have my LAN computers connect to it. Is the best way to use a bridged connection? Is there another way? I've tried setting up a ...
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29 views

Showing Unmanaged in network ICON even i have a working internet and local net

I have installed Ubuntu 12.04, I have assigned a Manual IP Address for my Host using Bridge, I'm using KVM so i have to use Bridge for assigning same network range for Virtual machines, Now the issue ...
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1answer
116 views

Bridge Ethernet and Firewire

I'm trying to connection between my eth0 and firewire0 interfaces on an Ubuntu 12.04 server. I tried using brctrl, but it apparently doesn't support firewire: samuelwn@master:~$ sudo brctl addif br0 ...
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3answers
400 views

Create “virtual” LAN on laptop (not VLAN)

I'm running a number of virtual machines on a Ubuntu 12.04 host. For various reasons all these VMs need fixed IP addresses. The laptop in question is used for demonstrations -- and this is where the ...
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22 views

Using server as controlled switch

I have an Ubuntu server with 3 NICs installed. I have two classrooms. I want to control the two classrooms with IPtables separately. My problem is that I can't (bridge eth0 to eth1) and (bridge eth0 ...
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116 views

Network bridge has no internet access

I have a machine with two network adapters and I want to use it to share its internet connection to an IP phone (because there's only one Cat5 cable available and while the phone has built-in switch ...
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0answers
171 views

how to forward ethernet internet from ubuntu pc via wifi stick to windows 8 laptop

This is my setup: Ubuntu PC connected via Ethernet connection to a LAN that has internet connection has a WIFI stick, (the router does not have WIFI support) Windows 8 Laptop with ONLY WIFI (no ...
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1answer
24 views

VM Player 6.01 on Win 8.1. Ubuntu on VM, internet connect fail

How do I connect to Internet on Ubuntu 12.04 installed in a VM Player on a Win 8 machine?
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1answer
160 views

How to bridge between two computers

I have this 3 machines with this setup Computer1----Computer with Ubuntu 12.04-----Computer2 Computer1 have IP 192.168.10.1 and Computer2 have 192.168.10.10. My computer with Ubuntu have 2 ethernet ...
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190 views

Unable to restart my network services

I cannot restart my networking services by using the restart command. Earlier it was working fine but today I created a lot of mess by giving IPs removing and all. And now when I enter the restart ...
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0answers
149 views

Connecting Ubuntu to internet using Windows 8 as bridge?

I have a Dell Inspiron 660s running Windows 8.1, and I just did a full boot of Ubuntu 13.10 onto a Dell Optiplex 330 that was previously running Windows XP. My goal is to connect to the internet by ...
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62 views

How to bind LXC instance to a virtual interface in Ubuntu 12.04?

I would like to bind my LXC instance to a virtual interface, eth0:1. All the other tutorials/guides I've seen involve setting the main interface to br0, and restarting the networking service, which is ...
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1answer
134 views

Mysterious multicast packets after bridging a bond0

I've got 2 interfaces eth0 and eth1 in a bonding (mode 4). Now I want working with kvm and let the instances communicate over a bridge br0. Now my config changes. From this...: auto eth0 iface eth0 ...