Ubuntu :: How To Bridge Networks In One Switch
Mar 8, 2011
I am new in ubuntu and really pleased with performance of ubuntu. Now I am in between a trouble of connecting two network in a switch. I may explain the scenario in detail. I have two Internet connections one connected through LAN (wimax) in to switch having internal DHCP (now we enabled this DHCP to connect our network) and another wireless internet connection connected via USB to a PC, this PC using ubuntu and I am successfully configured ppoe (EVDO), can use this Internet, and this ubuntu possessed PC also connected to Wimax via Network switch. We have 12 PC connected to this switch to share Internet (currently we all using Internet from Wimax through network switch). Still we have a problem of consistency of wimax connection our region. So we decided to connect ppoe (EVDO) in to the same network if Wimax connection is not available. How I connect both in to one network?
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Jan 30, 2011
[PC]--(wire)--[Router1]--(wire)--[Laptop]==(wireless)==[Router2]::[Internet]
My setup is above, I hope it comes out OK on this forum, and someone can understand what its supposed to be! My problem is I am not sure how to get [PC] to be able to see [Internet]. From [Laptop] I can get both networks to work, and have tried using brctl to bridge them, but as soon as I do "ifconfig br0 up" neither network... works anymore (cant ping either router).
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Apr 12, 2011
I am a (somewhat) newbie to Linux (but have an extensive Windows background), and I have just installed Debian Squeeze in an old EeePc 701 4G using the netinst version only with the following packages:
eeepc-acpi-scripts
x-window-manager
gnome-session
gdm
gnome-themes
gnome-themes-extra
plymouth
bridge-utils
Now I would like to install Debian in my main laptop, but I think it won't be able to connect to any wireless networks during setup and before installing firmware-brcm80211 and wireless-tools (its wireless card is a Broadcom 43224AG). That being, and to avoid connecting the computer directly to the router (it is not easy), I would like to bridge the EeePc's wireless connection to my laptop using a cable. I tried using the instructions found at the Debian Wiki, but I couldn't set it up properly.
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Jan 13, 2011
I've two networks (network 1 in the apartment, network 2 in the basement/server room) I would like to build a vpn connection between the two networks. In networks 1 I have a 24h running PC/Firewall/Debian Server. For network 2 I would like to buy a RVS4000. Is it possible to connect the two objects (Debian and Cisco)?
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Jun 30, 2010
I have a hub with some VoIP phones attached as well as a machine that is used to record the calls. This all works fine as all packets coming to/from the voip phones are also seen by the recorder so it can process them as necessary.
What i want to do is put another machine between the hub and recorder and have it act as a transparent firewall. So far i've managed to successfully set up a bridge on ports eth1 and eth2 and all the packets destined for the recorder go through the bridge fine. The problem is that the bridge is acting as a switch so the packets from the phones are received on eth2 but don't get retransmitted on eth1. Is there any way to configure the bridge so that all packets received on eth2 are transmitted on eth1, i.e. have it act as a hub instead?
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Dec 20, 2008
I've successfully install kvm with private network (nat) up running. I want to switch the kvm network using bridge mode (or host-interface), but do not success. env: nic iwl4965/ kernel 2.6.27.8/ debian etch upgrade to lenny/ kvm 0.9.1/ hardware hp 6910p The doc I follow up is at [URL] The way how i set it up is to modify /etc/network/interfaces by adding following section to enable br0
Code:
allow-hotplug br0
iface br0 inet dhcp
bridge_ports wlan0
bridge_fd 9
[code]....
However, the problem is the guest os, which starts with -hda k1.img, can not access to the internet. Is there any step I miss? or it is because wireless does not support bridge (I've heard doc says that wireless does not support wireless bridge)?
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Mar 21, 2011
I am looking at various laptops at the moment and it's appealing to get a quad core (2720QM) when I need the power (yes, I have an application that can utilize many cores in parallel just fine). But, most of the time those extra cores will just there eating battery. Is it possible to switch a few off?
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Dec 8, 2008
I want to set up a bridge using bridge-utils within /etc/network/interfaces like is shown here in this guide: [URL] The problem is that, at the same time, I want eth0 to have a specific static IP address. Right now I have a configuration for eth0. This guide tells me that I should not configure eth0 outside of the br0 configuration.
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Apr 16, 2011
I am trying to configure my android phone (rooted Eris running kaossfroyo 2.2) to be used as a midi controller. Which I am having enough trouble with as it is but it has raised an annoying issue that occurred a month ago when I used the phones tethering network with my laptop. After connecting the laptop to the phones network (either tether, or an Ad-hoc network created using the network manager) I am unable to switch to other networks. In other words when I'm done with the phone-laptop connection I cannot connect my laptop to my home network! When I click on the other network connection I can see that it is attempting to connect in the upper right corner of the desktop (the network icon) but it will not make the connection.
What happens is that the network indicator will make the little circle graphic as if it is trying to connect but it never will display the other circle as green indicating that it has connected. but when I disconnect from the home network that is not connecting I will get a message underneath that will say that ad-hoc network disconnected! If I am switching from the android tether it will say Android-Tether disconnected etc. Even though when I click on network manager it shows that I am attempting to connect to the home network (labeled LIBERTY in my case) upon disconnection it shows the ad-hoc or tether connection being disconnected.
I am absolutely baffled by this! The issue persists even after deleting the ad-hoc connection from the wireless settings tab!!! I would speculate that for some reason the laptop is attempting to connect to the previous ad-hoc connection despite me wanting it to connect to LIBERTY. I am very confused and hope someone can lead me in the right direction.
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Jan 7, 2010
I could use Wireless network. I could see several different networks in my range. Then suddenly the network stoppedworking, and I can no longer see any networks under "Wireless networks".The Wired networks works fine.I tried upgrading ubuntu, but nothing changed. Just to confirm, I rebooted the computer in Windows Vista (Dual boot) andconfirmed that Wireless worked fine there. No hardware problem then.The suggestions I have found on this and other forums suggest looking at the output from iwconfig and ifconfig. But since I'm a n00b at Ubuntu I don't know what to make of it.
This is the output:
emil@emils:~$ iwconfig
lo no wireless extensions.
[code]...
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Jul 28, 2009
Can the fibre channel switch in the centOS5.3 cluster edition be switched for a regular router or hub?
If so how would one do this? If not why does the switch have to be fibre channel?
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Mar 14, 2011
I am using a Fling KVM switch (by Belkin), to connect 2 computers to my monitor One computer is running XP and the other is running Linux. My wireless switching mechanism has just gone the way of the saints but Belkin has supplied a software solution for this occurrence. There is a small app called Fling (surprising) that allows me to switch from the XP machine to the Linux machine but nothing to switch back to the XP. What I need to know is there a similar app for the Linux computer. (NB I have tried Synergy but have no idea how to set it up - I've been told that synergy might work).
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Jun 11, 2010
I have an old laptop, which doesn't work, as the hard drive died, and can't be detected. I only recently considered trying ubuntu, so I put in the live CD, and it started, although it was very slow. Wired Internet worked, but of course there was nowhere to install drivers for wifi.
When I want to connect my Xbox 360 to the internet, the only solution I have currently is to use my working laptop. In windows, I rightclick on both the wifi and ethernet, and bridge them.
Now, this isn't a great solution, because it means nobody else can use the laptop at the same time, so my family basically say I can only use it when nobody else wants to. Which is never. So it occurred to me that since I'd only need to use the ethernet port and the wifi card, I could set it up as a permanent solution to my gaming needs. Obviously a Live CD wouldn't work; it would have to be a live USB. I can easily get that sorted, but is this viable? I don't know if bridging the connections is viable in Ubuntu, but I'm sure there must be some way, considering how versatile it is.
In case it helps, my old laptop is an Inspiron 1525, with Broadcom wifi card. My new laptop (although I doubt this has any relevance) is an Inspiron 1545.
PS - Is 'wireless bridge' the correct term? It sounded about right when I typed the title.
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Jul 19, 2010
I have a Gateway laptop running ubuntu 10.04, and just now have a compaq desktop running windows 7, my laptop has wireless internet connection, it's the only way that i can get it in my room. my desktop has only ethernet plugin. My question is, If i plug my laptop up to my desktop using an ethernet cable, can i bridge that connection to get internet from my laptop(using the wireless) to my desktop(using the cable)
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Nov 3, 2010
My host is ubuntu 9.04 and the guest is winxp sp3. I need to use QEMU to monitor the network communication for security researches. But I failed to establish the connection between the host and the guest.
To build a TAP connection, I input commands as the following t.
How should I establish the TAP and Bridge connection in the QEMU?
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Dec 13, 2010
My first, followed a couple of Ubuntu how tos and used LinuxFoundation bridge doc. I still have managed to mess it up! Here's the simple test network, First -- ALL hardware is fine, I have verified everything, to the last cable. In fact this is being written from the test network without the bridge running.
OK, I have a firewall that has dhcp server on board, I have a client workstation with dhcp enabled network card(eth1) (the one I current typing from). There are 2 switches between the firewall and the workstation (eliminate xover issues when testing) That's it. All is well. Now I want to place a computer in line between the firewall and the workstation. It is a 10.04 server install, no gui, minimal install. It has 3 network cards, One of these ports was used to set up the server. It is set up dhcp and it works just fine, I spent all kinds of time ssh'ing into the box, so the dhcp client is good to go.
I disconnected the cable to that interface and ran a cable from the firewall's switch to one free port(eth0) and a cable from the workstation switch to the other free port(eth2). From the console I do ifconfig -a and there are all 3 eth's, 0,1, and 2 I then open /etc/network/interfaces and to lo and eth1 I add this:
[Code]...
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May 5, 2011
First of all I have a Ethernet cable from the wall to my desktop then I have a Ethernet cable from my desktop to my laptop. Before I did a fresh install of Ubuntu 11.04 I was using Ubuntu 10.10 and I found a tutorial to make this network bridge work by changing settings in the Devices - Network Tools. I need to make this bridge work again and i totally forgot how and I can't find the tutorial.
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Jul 30, 2011
I am trying to connect networks connected via locked down wireless routers. Here is the setup:
Internet <-> eth0 - server - eth1 providing DHCP <-> hub <-> wired clients & to WiFi router with NAT & DHCP <-> WiFi clients.
I want the wired clients and the WiFi clients to be able to talk to each other directly, but the locked down WiFi router (meraki) is in the way. the wired clients get their IP address from the server, the wireless clients get theirs from the meraki WiFi router. I can't reconfigure the WiFi router to bridged mode without paying meraki a sizeable annual license fee. What options are out there to get through the WiFi router? I came across OpenVPN and ethernet bridging, but broke networking on the server when trying to configure the br0 interface. I followed these instructions: [URL]
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Oct 18, 2010
I have spent the last 24 hours trying to work a wireless bridge (a D-Link DAP-1522) into my network configuration. It would connect to our gateway here at home (some 2WIRE piece of garbage AT&T hands out, but I digress), and two computers (an Ubuntu Desktop and an Ubuntu Server) would connect via the bridge.
The bridge SEEMS to connect to the router, and indeed, the Ubuntu Desktop PC is able to access the internet. The server, however, is not, and neither computer can communicate with the other (ping, SSH, etc.) furthermore, the router recognizes the presence of these two computers on some level, but does not seem to know their IP addresses (I assume this is related to the computers' inability to communicate).
Before I get too far into this, here are a few links/items for the sake of clarity. The first is a shoddy diagram of my (proposed) network topology, for all of you out there who, like myself, understand things visually:[url]
This is the output from running "ifconfig eth0" on the Ubuntu Desktop PC, which sits behind the bridge. The PC is connected, and can ping hosts across the Internet, but can only ping the router locally (that is, it can't ping any other device in the house, on either side of the bridge):
Code:
The router uses wireless encryption, not MAC addresses, to restrict access/traffic, and all wireless devices (including the bridge) have been provided with the proper credentials. There shouldn't be any devices being denied access on account of their MAC address. In fact, the router's control panel lists the PC and the Server among the recognized devices (even lists their MAC addresses), but provides no IP address and always considers the two computers to be "offline." And yet, I am writing this very post from the Ubuntu PC. Sigh.
I am very comfortable with computers, and reasonably comfortable with Ubuntu/Linux and the Linux command line -- I've been using the operating system for just over a year now -- but networking issues have always been perched right on the edge of my understanding. In short, it's likely this issue has more to do with me than it does with the hardware itself (although the more forums I browse, the more I start to doubt this bridge...).
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Nov 2, 2010
I have a Ubuntu server with multiple NICs and I'm just thinking about a potential scenario that might come up soon.
Imagine I have a network on floor 1 with an independent cable connection to my Ubuntu server -> switch -> assorted devices, on the subnet 192.168.0.x Now imagine friends upstairs have another independent network with cable -> router -> assorted devices, on subnet 192.168.1.x.
How can I set up my server to provide access for the 1.x subnet to the 0.x and vice versa. Ideally the devices all access internet from their appropriate subnet. I've read something about bridging, is this what I need?
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Nov 5, 2010
before i used Ubuntu(i was hiding under a rock) i had my wireless network and Ethernet bridged so that i would be able to broad cast my network printer to the home network. i switched to Ubuntu and it is rather annoying to have to shutdown Ubuntu and boot windows just to print a document
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Nov 9, 2010
I'd like to stream my laptop's audio output wirelessly to my hifi, and my wife's laptop too so must also work from a Mac. I guess if it's based on analogue rather than usb then we could stream the iPod too, but I don't know what's available. Does anyone know how this might be done?
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Nov 19, 2010
I have a wireless network that is upstairs, i cannot run a cable down here, however i've got 3 boxes that i want to run as servers..
1. Desktop running 10.10 (the one with the wireless card)
2. Server running 9.10 (no wireless card.. is currently connected through a wireless B gaming bridge)
3. An old P4 that I will be putting 9.10 on and running as a server.
Take the Desktop that has the working wireless card as my normal desktop and also running as a passthrough for the switch to go to the other two while still allowing all of the port forwarding to the other two to be handled by the router upstairs so basically what I want to do is this
= wireless connection
- wired connection
[Internet]--[wireless router]==[Desktop]--[switch]--[server1 + server2]
Everything i've come across so far has been for going from a wired router to turn a box into a wireless AP unfortunately i need the reverse.. a wireless bridge. if someone can point me in the right direction (or i'm not against hand holding if it's available.
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Dec 8, 2010
I first want to say that I am very new to Ubuntu so please forgive any ignorance I have successfully given internet access to my xbox by connecting it via crossover cable to my ubuntu 10.04 laptop and given the eth0 settings "share with other computers" My issue is that the ip address being given to the xbox is 10.42.43.10
How can I change this ip address given, or use a static ip address (ie 192.168.x.x) because using this ip address keeps my xbox from accessing windows shares on WORKGROUP on my 192.168.x.x network.
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Mar 30, 2011
I am trying to configure an external wireless bridge for a few systems to replace a very long, duct taped cable.
I have it set up and it is connecting, at least I can see the pfsense router on the other side and ping any machine in the network.
Here's the issue, I cannot get dhcp to work across the link. I set a static address (dns servers and all) but when I try to ping google i get "Network is Unreachable"
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Jul 29, 2011
How do I setup a network bridge in Linux (Ubuntu)? I want to use my computer as a "router" for my Xbox 360.
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Aug 12, 2011
It works fine when I boot into Win7 but in 10.10... Nothing..
ifconfig
Code:
eth0 Link encap:Ethernet HWaddr 00:16:76:13:16:44
inet6 addr: fe80::216:76ff:fe13:1644/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
[Code].....
I've read and read and tried just about everything out there.."If it works in WinX it should work in 10.10"... But it doesn't..
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Aug 12, 2009
I'm toying around with ubuntu + LTSP. I've managed to get the computers to boot off the network card "eth0". "eth1" is facing the internet. How would I go about the process to bridge the connections so the ltsp clients can access the net?
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Dec 11, 2010
Virtual Box.in "VB host only Ethernet adapeter mode" i am able to communicate with Vbox via WinSCP and browser(ip address)
BUT when i switch to Bridge mode/NAT (pref bridge) in Vbox i am unable to get external internet access [to install app's from internet
Current host config
XP
Dynamic IP
host subnet 255.255.255.0
Host gateway 192.168.1.1
code....
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Feb 23, 2011
how to enable Bridge between tow network card.
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