Questions about configuring and using bridging interfaces

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Share internet connection to distribute ubuntu nodes sitting behind master

I'm working on setting up a 20 node distributed system. The data nodes are hp Compaq 6500 pc's running Ubuntu 12.4.5. The master is connected to the internet and I've configured the IP's of the nodes ...
0
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1answer
13 views

DHCP Stopped working over Bonding

Something recent broke DHCP and Bonding. I used to be able to do this: # This file describes the network interfaces available on your system # and how to activate them. For more information, see ...
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23 views

Repository MTR strange behaviour:

Can someone explain this MTR readings or that may be a DNS resolver issue. have tried many things: such as changing dns to popular public ones with no changes First issue: MTR GUI does not show the ...
1
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1answer
45 views

Ubuntu linking two wireless networks and sharing internet connexion

I must at first say that I'm a total noob regarding networking. I have two wifi adapters (wlan0 and wlan1). wlan0 is connected to a wireless router that is not connected to internet. wlan1 (a long ...
1
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1answer
24 views

configure networkmanager to share internet

I am connected to a WiFi Network with my laptop, now I would like to connect another device at my LAN port, so it can also use the internet connection I got over Wifi How can I configure this in my ...
1
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1answer
86 views

How does the Linux bridge works when a tap interface is connected

Assume the following scenario: brctl addbr BR0 tunctl -t tap0 brctl addif BRO tap0 brctl addif BRO eth13 ifconfig eth13 promisc up ifconfig tap0 promisc up ifconfig BR0 up Eth13 is connected ...
1
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1answer
46 views

no network in ubuntu13 when virtal box is configured with bridged adpater

I am using Ubuntu 13 on virtual box with my host being Windows 8. My aim is I want to ping from host to guest or from any physical machine to guest (Ubuntu).I am able to ping from guest to host but ...
1
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3answers
8k views

network bridge - without destroying network manager

I have seen a lot of questions related to Bridge and network manager. however none of them seem to apply to what i seen AND want. I setup my bridge in /etc/network/interfaces. This works perfectly; ...
1
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1answer
105 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 ...
4
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1answer
5k 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 ...
1
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0answers
101 views

KVM: Multiple bridges over single NIC

In my KVM host (Ubuntu 14.04 LTS) I want to setup one private network for the guests with static IP and internet access. Host is on a remote machine. I've the following configuration in the ...
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49 views

Is there any way to force an inteface to ignore carrier detection to stay up?

br0 has eth13 and eth0 ensalved to it eth0 is up eht13 is down /opt# ip link show br0 25: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default ...
1
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1answer
385 views

KVM - Create a virtual machine with 2 bridges interfaces

Can someone please let me know to create a VM using KVM with 2 bridged interfaces. I have a server that has Eth0 and Eth1 configured and connects to 2 separate networks, I'd like to create a VM within ...
0
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1answer
49 views

How to connect to two VPNs at the same time?

At my university, I have to connect to the local VPN in order to be able to connect to the Internet, at the same time, I want to connect to another VPN. What should I do?
4
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1answer
3k views

sharing internet between network interfaces

I have a laptop with lubuntu 11 with two network interfaces, wireless and wired. Wireless interface connects to the router with DHCP and provides access to the internet. The wired interface has a ...
0
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1answer
353 views

OpenVpn bridge problem - Server behind NAT - Client can ping server, default GW but nothing else

first of all, yes I have been searching.. The issue is with setting up OpenVPN in bridged mode on ubuntu Server 12.04. It generally works, I can connect, I get an IP and can ping the OpenVPN server ...
13
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3answers
47k views

No internet connectivity in virtual-box with both Host and Virtual OS being 12.04

I have Precise 12.04 installed as the host OS. In VirtualBox,I also have installed 12.04. I am not able to connect the Virtual 12.04 to the host internet. I have tried selecting all the available ...
0
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1answer
32 views

Can see all computers on the networks but can't see each other

I have a windows 7 pro machine (KC-Laptop1) running a bridged network between the wireless corp.local and my wired KC_Computers_LLC.lan and I have my ubuntu 12.04 server (KC-Server1) running on the ...
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0answers
41 views

VirtualBox networking can be enabled only via recovery mode

I've installed ubuntu server with minimal system without network connection (disable network adapter) in VirtualBox, because my connection is so slow and it's take forever to install with network ...
3
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2answers
4k views

Why do we need an IP address for a bridge?

A bridge is a layer 2 network device. On physical bridges we only have an IP address for operation and maintenance. I'm a little bit confused why we need in KVM an IP address for the bridge. I ...
0
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1answer
67 views

Long boot time due to “waiting for network configuration” - but network is configured statically

My system has a statically configured network that is fully functional. However, booting needs a long time due to "Waiting for network configuration" messsages. What can be the cause for this? I ...
1
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1answer
53 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 ...
0
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0answers
84 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 ...
3
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3answers
1k views

Switching Juju lxc bridge

I've set up Juju running in LXC, and I'm attempting to expose it to the internal network. I'm generally following this question to point lxc to my existing bridge (eth-br0). I've edited ...
0
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0answers
72 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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0answers
92 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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2answers
2k 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 ...
0
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0answers
38 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 ...
0
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0answers
93 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 ...
0
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0answers
200 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 ...
0
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1answer
41 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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0answers
303 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 ...
0
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1answer
2k 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 ...
1
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1answer
4k views

Bridging eth0 and vboxnet0 and using ISC DHCP server to provide dynamic IPs

I have Lubuntu 12.04 (64bit) with VirtualBox 4.2 installed and the setup below: eth0 adapter connected to LAN (having static IP 192.168.0.1 and it is the default gateway). ISC DHCP server listening ...
1
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2answers
486 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 ...
3
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2answers
8k views

How to share my mobile broadband connection via Wifi

I am running Ubuntu 12.04 on my laptop having wifi. I have an android tablet which has wifi support. I connect my laptop to the internet through Mobile broadband (reliance netconnect zte modem). I ...
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1answer
47 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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0answers
1k 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 ...
4
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1answer
7k views

How to stop Wireless AP Hosting using Network Manager on Ubuntu?

I use the following script to make my netbook a full-fledged wireless access point. It creates a bridge with eth0 and wlan0 and starts hostapd. #!/bin/bash service network-manager stop ifconfig ...
0
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0answers
83 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 ...
2
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0answers
2k 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 ...
0
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0answers
180 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 ...
0
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0answers
129 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 ...
0
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1answer
171 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 ...
0
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1answer
483 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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0answers
189 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 ...
3
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1answer
108 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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0answers
19 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 ...
2
votes
0answers
546 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 ...
2
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0answers
137 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 ...