Ubuntu Networking :: Getting A Bridge Constructed?

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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Networking :: Setup A Bridge Using Bridge-utils Within /etc/network/interfaces?

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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Ubuntu Networking :: How To Bridge A Connection

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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Ubuntu Networking :: How To Bridge Wireless LAN

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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Networking :: How To Bridge Different ISP?

Mar 30, 2011

i have two ISP, and i want to bridge each IP. Here my example;

ISP one : 10.10.10.1/29
ISP two : 172.16.100.1/28

can we setup for two ISP with different gateway ??

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Ubuntu Networking :: Setting Up A Wireless Bridge ?

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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Ubuntu Networking :: Bridge Two Subnets With A Server?

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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Ubuntu Networking :: Using Desktop As A Wireless Bridge

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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Ubuntu Networking :: Wireless Bridge IP Settings?

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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Ubuntu Networking :: Wireless Bridge No DHCP?

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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Ubuntu Networking :: How To Setup Network Bridge

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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Ubuntu Networking :: WET54g Bridge Won't Work 10.10?

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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Ubuntu Networking :: Using Tomato Router As Wireless Bridge

Feb 5, 2010

Using Ubuntu Server 9.10 x64 and a tomato router to act as a wireless bridge to connect to another router. The reason I ask is because I do have the router set on WDS mode on the tomato firmware. I think I have it configured to the best of my ability, but when the interface is up, the signal doesn't get pushed out (no received packets) and it gives something at the bottom of an ifconfig eth0 "Interrupt:28".

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Ubuntu Networking :: Share Wireless And Bridge To Ethernet

Feb 26, 2010

I'm trying to share my ethernet via my wireless card. It doesn't work. Here is some info:

lspci
04:00.0 Network controller: Broadcom Corporation BCM4311 802.11b/g WLAN (rev 01)
05:00.0 Ethernet controller: Broadcom Corporation NetLink BCM5787M Gigabit Ethernet PCI Express (rev 02)

lsmod
b43, mac80211, cfg80211, ssb

I've tried everything listed in these forums but every time I run
sudo iwconfig wlan0 mode master
Error for wireless request "Set Mode" (8B06) :
SET failed on device wlan0 ; Invalid argument.

I tried the STA drivers and get the same thing except the kernel module loaded is wl instead of b43. Is it even possible to set this card to master mode? I can't find jack on the net.
uname -r
2.6.31-19-generic

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Ubuntu Networking :: Enable Wireless Bridge - No Corresponding Option

Mar 24, 2010

I want to create the following network:
I have a Belkin 54g ADSL Router/Modem connected to ADSL
I connect my laptop (Ubuntu 8.04) wirelessly to this router
I have a Netgear DGN2000 Router/Modem with NO connection to ADSL
I connect my desktop to the Netgear using a wired connection
I want to bridge the two routers and use the internet on the desktop

The Belkin 54g Router setup has options for Wireless Bridge.. I have selected "Enable Wireless Bridging"; as far as I can tell there is no corresponding option in the Netgear DGN2000's settings to act as a wireless bridge. I have changed the ESSID, Security, and Channel all to the same settings and when I turn on the Netgear router the signal strength of the network dramatically increases. I am unsure whether this is the "Bridge" connected... or if the Netgear's signal is just drowning out the Belkin's signal. In any case I cannot use the internet when connected to the network with the Netgear turned on. What do I do?

Or is there some way I can share internet like this:
wireless wired
ADSL--->Belkin54g----------->Laptop-------------->Desktop

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Ubuntu Networking :: Wireless To Wired Network Bridge

May 3, 2010

I am running ubuntu 9.10 on a dell xps m1530 laptop dual booting with windows 7. I am trying to achieve the following setup.

Wireless router <=========> Laptop <-----> Switch <-----> PS3

---- wired
==== wireless

Both laptop and ps3 have static ip addresses

The reason for this is I can connect to the internet on my ps3 through my laptop, and I can stream from my laptop to ps3 through wired connection. This works fine in windows 7 all I had to do was right click bridge connections. As I dual boot I don't want to have to make any changes to the settings on the ps3.

My interfaces are:
eth0 - wired
wlan0 - wireless

I installed bridge-utils and created a bridge and added both eth0 and wlan0 to it. However I could not get it to work. I have also tried internet sharing through network manager and firestarter.

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Ubuntu Networking :: Bridge Wireless Connection With XP Computer

May 5, 2010

How I can make this "link" with Ubuntu 10.04?
pc 1 == win xp
pc 2 == Ubuntu 10.04

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Ubuntu Networking :: OpenVPN Bridge Mode Firewall?

Nov 7, 2010

I have OpenVPN running on my Ubuntu Server just fine. I can connect over the Internet and access all my resources on the LAN via bridged mode perfectly. My server only has one LAN card and sits behind my router, which means it has a private IP address of 10.1.1.2....Which brings me to my question. I want to open up access to my friends via OpenVPN, but I don't want them to be able to access other machines on my LAN (e.g. 10.1.1.20). However, I do want them to be able to talk to each other and pass broadcasts (old LAN games), as well as my laptop (let's say 10.1.1.7).I've tried using iptables to block traffic to the LAN (such as .20), to no avail. I've been reading up and it seems as though iptables won't even filter the traffic, as it's passed at a lower layer. Is this true? If so, what do you recommend I do in order to prevent my buddies from accessing the rest of my LAN while siumultaneously allowing broadcasts pass for some very old Windows LAN games (we're talking Windows 9.

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Ubuntu Networking :: Connecting To Internet Through Network Bridge

Nov 13, 2010

I setup a network bridge on pc A, with windows 7 installed on it, using windows default bridging tool. I connected computer B to computer A and Im trying to connect to the internet through the network bridge on computer A. Computer B (client) has two OS's installed, win XP and linux(tried with different distributions, didnt work). On windows XP everything is working, when i try to ping the router (after computer A) it also responds. On linux system nothing is working, and im not quite sure why.

I set up linux to receive IP adress from DHCP, which is router in this case (behind computer A), same way windows XP was configured. I decided to ask here, because I couldn't find anything on the net. My guess is windows-made bridge supports only windows-OS's but that would be kind of strange (its just a software bridge).

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Ubuntu Networking :: OpenVPN Bridge - Cannot Get Faster Connection

Dec 5, 2010

I have an openvpn bridge up and running (ubuntu to ubuntu, both in vmware fusion machines on macs). My problem is that I cannot get a connection faster than ~9mbps even though 20+mbps is available. I've been troubleshooting for a while and have tried many fixes. I just now did ethtool tap0 and I think maybe I found it. It says the link is 10mbps. I tried to change it with:
sudo ethtool -s tap0 speed 100
but it says ethtool cant change speed on tap0. How can i define the link speed of tap0?

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Ubuntu Networking :: Manually Reassign A Wireless Bridge In 10.04

Jul 20, 2011

how do you manually reassign a wireless bridge in xubuntu 10.04.. Or basically configure it without having to do so through the installation process.. Hopefully there are commands for it.

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Networking :: Bridge Eth0 And Wlan0 Connection On Ubuntu 11.04?

Jul 23, 2011

just wondering if I could get a hand with bridging my eth0 and wlan0 connection. I'm using Ubuntu 11.04 if that helps at all.

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Fedora Networking :: Two NIC's Can Be Bridge Together Even Though They Are The SAME Subnet?

Aug 9, 2009

I have 2 NIC's in a box. One of them is external and doesn't matter for this question I don't think.

The other NIC is 192.168.100.3. It hosts an iSCSI Target and SMB Share on my LAN. It's works great.

I have another PC that has NIC at 192.168.100.101 and it hosts my DHCP (Scope: 192.168.100.5-25) server for my LAN.

I have a hardware firewall at 192.168.100.1 and it serves inet to the LAN on a different external connection.

So...

I currently have a WAP (cheap p.o.s. netgear router in WAP mode that keeps overheating). I want to eliminate the WAP device and add a WiFi NIC to the Top PC above.

So, on the first system I would have:

NIC 1: External IP and External Gateway
NIC 2: Static IP 192.168.100.3
Proposed WiFi NIC 3: Static 192.168.100.4

Question:

If I bridge NIC 2 and NIC 3 like this:

# brctl addbr br0
# brctl addif br0 eth0
# brctl addif br0 eth1

Then I simply put the WiFi in Ad Hoc, will another WiFi in Ad Hoc (for example my laptop) be able to "see" 192.168.100.101 (DHCP) & 192.168.100.1 (Gateway) (via WiFI 192.168.100.4 through the bridge to 192.168.100.3 and on to the LAN)?

Also, can the two NIC's be bridge together even though they are the SAME subnet?

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Fedora Networking :: How To Setup Bridge

Oct 4, 2009

I tried google but without success. I have a small home network and one computer has to work as a bridge (comp1), it connects to the internet through wlan and is connected with cable to other computer (comp2), I would like to to make that second computer member of a local network with internet access.I was trying this:

Code:
ifconfig wlan0 0.0.0.0
ifconfig eth0 0.0.0.0
brctl addbr br0
brctl addif br0 wlan0
brctl addif br0 eth0

[Code]...

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Networking :: Configuring Ethernet Bridge?

Nov 3, 2010

I am using 3 machines in a LAN connected through a hub. My intention is to have a end-to-end connection between 2 machines so that I can control delay/loss rate. For that purpose, I am using a 3rd machine with 2 NIC and intend to use a bridge and installing Dummynet in this machine to control the traffic between the other 2 machines.I have successfully installed Dummynet in the bridge machine. Now I require to configure Ethernet bridge in the machine. What is the process? Do I need a kernel compilation or can be done without it? read somewhere that recent kernels can be configured without recompilation.I am using Mandriva 2010 with 2.6.31.5-desktop-1mnb kernel.

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Networking :: Bridge Be Configured To Act As Hub Not A Switch?

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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Networking :: Bridge A Ppp Dongle With A Wired LAN?

Feb 5, 2011

I have a LAN (2 PC !) wire connected and I use a Huawei e182e to join the internet (If you have problem to install the Huawei on Linux, don't install drivers proposed on forums or don't try to unlock it. It's not necessary, simply install a kernel > 2.6.34 and it will install itself as a perfect plug and play). On the unconnected machine, the Internet is accessible normally from the broadband dongle, but the connection stops when I plug the LAN cable. It's normal since the PC cannot use both network connections simultaneously without a previous configuration, and the question is precisely there !

Bridging could be a solution but mobile broadband uses ppp protocol that is not on the same layer as wired LAN. brctl refuses to add the key into the bridge configuration. Vtun seems a better approach since it works more independently from the protocols, but it must be installed on both sides and the broadband dongles does not accept software installation in it. Documentation from Huawei is quite inexistent. Actually the story could be the same for a computer connected to a wired LAN and using a wireless dongle, but here bridging is feasible (not tested by me) because they work on the same layer. I tried to deactivate LAN switching in the BIOS: no result static address with gateway pointing on the other device (I tried everything) no result. How to bridge a ppp dongle with a wired LAN?

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Networking :: How To Set Up Knoppix As Wireless Bridge

Feb 27, 2010

I have a Windows 7 machine which is having issues with a Linksys Rangeplus wireless card, specifically kernel dumps every couple of hours. I have an old (really old) tower sitting in my room which I would like to turn into a wireless bridge so that I could connect the windows box to the internet without dealing with the blue screens. I plan on using Knoppix as I have it available already, but if it would be easier with another distro I can always download it. If this doesn't work I'm going to have to buy an old WRT54G offline and convert that with DD-WRT...

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Networking :: How To Bridge Tcp/ip To Serial Port

Apr 27, 2010

I want to implement the following scenario :-[workstation1] <--ETHERNET-->[device 1]<--SERIAL-->[device 2]<--ETHERNET-->[workstation2]In short, a LAN over Serial link (RS-232 for instance).If there is a utility that offers such functionality, kindly give me the name, i've googled a bit, and found ser2net, but that only works with TELNETing.. i want it work like a normal LAN like file-sharing n all but over Serial.If there is no such software, then obv i have to program myself. regarding which i have more questions

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Networking :: Unable To Delete Bridge?

Nov 3, 2010

I have added a bridge "mybridge" using brctl bu not added any interfaces yet. Even the brctl show command looks: bridge name bridge id STP enabled interfaces mybridge 8000.0000000 no

Now I try to do: brctl delbr mybridge and it gives: bridge mybridge is still up: can't delete it

I performed ifconfig mybridge down but still the problem persists!

How to delete the bridge?

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