Ubuntu Networking :: Multiple Devices On Single Network
Jan 14, 2010
I've got a co-worker who is trying to connect multiple devices to his wireless router - Xbox, Wii, TV, Dishnetwork box, etc. Not all of the devices are wireless however. He's had several thoughts on how to get this done and I know very little about this kind of thing so I thought I'd ask some of you.
His first thought was to buy a multi port bridge, but he doesn't like any of the ones he's seen so far.The other thought was to connect all of the devices to a switch and then use a single bridge, but he isn't sure if this would work.
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Jun 14, 2010
I always keep my headphones as well as my 2.1 speakers connected simultaneously on my PC (Gigabyte motherboard). Both these audio devices work fine simultaneously on my Windows 7, but in Ubuntu, only my headphones work, speakers don't work at all. I tried changing some settings in SOUND PREFERENCES as well as ALSA SOUND MIXER, but not luck so far.
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May 20, 2010
I have an old pentium 3 computer that has ~7 NICs installed. These NICs are attached to modems and other networking equipment. According to the linux ping page on computerhope.com, it seems that one could send a ping from a certain specified NIC. How would one go about this?
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Jan 23, 2011
I've been trying to set multiple IP my Fedora 14 but nothing seems to work. Upon browsing the net, I found there are two ways for it. One is eth0:0~eth0:n nd another is eth0-range0. All are configs under network-scripts. But neither of them worked for me. Even grabbing a working example from my live server doesn't do the trick (though the server is a CentOS 5.5).
Currently using eth0-range0
ONBOOT=yes
IPADDR_START=192.168.1.127
[code]...
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Oct 13, 2010
I have question about the UNIX sockets. my goal is to connect multiple sockets from a single client to a single server and keep them open...I'm not sure if that is possible to create or not. Do you have any suggestion or an example of code?
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Jul 8, 2010
I know a fair amount about setting up a simple network but I'm curious about setting up a more complex topology...For example...A "box" has two NIC's acting as a bridge, normally this would involve two distinct networks (ie. 192.213... and 192.214...) is it possible that this physical set up can create a single network (192.213... 192.213...) resolving IP's from either a DCHP on the "box" or a DCHP server somewhere else on "one side of the box"likewise with differing physical network types, a "box" with a NIC and a TCP/IP over usb setup connected to another device with TCP/IP over usb (OTG/Gadget) so that all the IP's are on one logical network.
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Dec 13, 2010
I am find myself in need of building what amounts to 3 ip networks on 1 physical lan.
first LAN is another companies network on the 10.0.0.0 network a mix of pc's and equipment
second is LAN new company network 192.168.168.0/24
third network is an ip phone system for both i would like to use 192.168.200.0/24
i am hoping to use the same dhcp server to do this, assigning address to the old company's 10. network via mac address reservation.
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Feb 16, 2010
I recently installed Ubuntu Server 9.10 with the intent of using it as a platform for running a couple of Windows XP virtual machines along with Linux/Ubuntu.
I had no problems getting the server installed. Had no problems getting the network up and running so that I had access to both my internal network as well as external connectivity to the internet. Had no problems getting a VM installed and putting Windows XP inside of it. Had no problems setting up a bridge between the WinXP virtual machine and the physical ethernet card (eth0).
What Im having trouble with is figuring out how to bridge from multiple VMs AND Ubuntu natively through one physical ethernet card.
When I set up the bridge, it knocks out the static IP address of the ethernet card that was set up initially with Ubuntu when first installed before the VM was created and installed. Therefore, connectivity within Ubuntu natively is lost.
Similarly, am having trouble figuring out how the second VM (also going to be running WinXP) is going to get its connectivity since it doesnt seem to like me setting up 2 bridges to the same physical ethernet interface card.
I need all 3 machines to have static IP addresses and be visible/accessible from the external network for either web/mail/dns/etc servers on the Ubuntu side and for remote PC control functionality on the VM side.
I have tried setting up alias ethernet interfaces (eth0:1, eth0:2, eth0:3) with static addresses which work fine from native Ubuntu in presenting multiple IP addressees, but it seems that Im not permitted to bridge to these alias interfaces.
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Apr 7, 2010
My requirement is to route ssh sessions from a single head node to multiple slave nodes. So what i want is, for a client there is just one point of entry (master/head node) to ssh into, it evaluates the load on the slave nodes connected on to internal network and routes the ssh session, kind of a ssh load balancer. Do you have any idea what open source solution i can apply for my problem?
I have tried using LVS piranha, it works well for http and https load balancing but not for ssh load balancing.
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Nov 17, 2010
I'm looking for some help on how to troubleshoot the network on Ubuntu 10.04 64 Desktop. It's on a Acer Aspire 721. There's a wireless card but the widget in the top right says there is no network device.
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Jun 6, 2011
Just built a box and once 10.04.2 64 bit was all installed and loaded up I realized instead of showing my Ethernet as connected it had the ol x. So when I clicked on it I got "No network devices available." The mainboard is an Asrock 890GX Pro3, link light completely out.
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May 10, 2010
Loaded Ubuntu 10.4lucid on TransPort NX Mobile Pentium II, 328MiB,Using Netgear Rangemax wn511b. with Broadcom STA wirless driver. bcm43gx.Boot computer and network manager shos "no network devices available" Run system/administration/hardware drivers and the Broadcom STA driver shows up (only one that shows up) REMOVE and then ACTIVATE and the network manager sees it and connects fine. Shut down computer, restart and no device. I am forced to Remove and Activate each time I start the computer.Is there a way to set this driver to be found and run at computer start.
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Aug 12, 2010
I'm running Ubuntu 10.04 on a HP Mini 1116nr as expected i have no Wireless access but i also seem to have no wired access either.
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Jan 9, 2010
I am running Ubuntu 9.10 and Windows 7 (Wubi). Windows Networking shows all devices on the network (computers, routers, etc). Is there a way to get Ubuntu to do this (Would prefer GUI)?
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Jun 23, 2011
I'm doing a few tests with fedora 15. I'm surprised because they changed the naming way on network devices. eth0 is now called em1.At every fedora I have found the configuration files in /etc/sysconfig/network-scripts, but today I can't find them.
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May 6, 2009
Right now I have this error
On my top right hand corner. No network devices available.
My distro is Centos 5.3
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Jun 30, 2010
I've got three network devices on a laptop:
1. Built-in ethernet LAN
2. Built-in ethernet WLAN
3. PCMCIA ethernet LAN
I installed Ubuntu Server on this computer without the last one inserted.I inserted the last one today, and it lights up when i put in the cable. To be sure if Ubuntu has found it, I tested with the install CD and could see that it found all three at the first part of the installation where I have to chose a primary device.I can't get my WLAN card working, neither do I get my PCMCIA LAN card working. The third card, this PCMCIA card, has worked on Ubuntu Desktop using another laptop. And as said, the setup finds all three.
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Dec 5, 2010
I just loaded 10.10 on an Acer Aspire One D255. When I installed Ubuntu, network manager loaded and I was able to use both the wired and wireless cards. After I used update manager, the kernel was upgraded, and I also added some wireless applications (RutilT WLAN Manager, SWScanner, and WiFi Radar). Upon reboot, the network manager doesn't work, and it cannot find any of the devices.
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Dec 4, 2010
Does anyone know of an application that continually scans for devices on a network and notifies you if a device connects/disconnects to/from the network? I just want a way of knowing when a computer is connected and when it's not.
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Dec 23, 2008
I boot linux off a USB stick on many different computers with different hardware. How can I determine in a script which devices eth0, eth1, wlan0 exist and which hardware devices they apply too? Sometimes a wireless card is wlan0, other times it is eth1 or even eth3! The proc/net/dev file does not inidicate which hardware is installed.
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Jan 28, 2011
I have not tried this, and I am only wondering about the result.Let's say that I have a PC/Laptop with two network devices: an ethernet and a wireless. Can I connect both of the to the same network (if this network allows both connection) to increase the transfer rate between the PC/Laptop and the server???
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Sep 12, 2010
I installl centos in my pc after i install, i cant surf the net,showing no devices for network
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Jun 1, 2010
I want to ssh to a pc in our home network. It is a standard network in terms of a DSL router, dynamic IPs via DHCP, WPA2/PSK security, wireless network connection for all pcs except one which is wired to the router.I got the error "no route to host" from ssh. Openssh-server was already installed. It turned out later that the laptop I want to ssh to (namely the one which is connected by cable) cannot be pinged by any other laptop on the network.
The pc in question (lucid lynx with most recent updates) is online, can ping itself and the router, but cannot ping others in the network and cannot be pinged by them. I suspect a firewall setting of being the problem.
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Jul 14, 2010
This may be more suited for the networking forums, but I figured Community Cafe would be well rounded enough for someone to tell me if this is even possible (with minimal configuration that is).There are a few places I travel where I only have a wired connection to the Internet (no wifi), but when this happens is there a simple way to create an adhoc network so wireless devices can route through my computer and to the network? Reason I'm asking is I'm thinking of getting an iPad or iPod Touch which have wireless connections, but in the cases where my laptop is using a wired ethernet connection and the wireless card isn't used, I'd like to create an adhoc wireless network that'll let such wireless devices work.
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Jun 20, 2009
I'm having trouble getting my wifi devices to work on my 128bit WEP network. I have a new Thinkpad T400, with an internal Intel PRO/Wireless 5100 AGN. I also have some cardbus cards: a Lucent ORiNOCO Gold, a Linksys Wireless-G, and a TRENDnet TEW-421PC. I have them set up as interfaces eth2, eth1, and eth3. (The TRENDnet isn't recognised as a network card at all, so no interface for it.) I have installed the latest firmware for the Linksys card.
The /etc/sysconfig/network-scripts/ifcfg-* files are virtually identical for all of them, differing only in the HWADDR and DEVICE lines. So here's the behaviour:
1. The Lucent card comes up just fine.
2. The internal 5100AGN and the Linksys cards won't come up, and watching with iwconfig shows that they're either associated with my AP OR they've got an encryption key set -- but not both.
3. When trying to bring up the 5100AGN, I get the following messages:
iwlagn: index 0 not used in uCode key table
iwlagn: index 3 not used in uCode key table
/var/log/messages shows DHCPDISCOVER requests being sent, but they're bound to fail since the association with the AP with WEP isn't being completed. And yes, the ifcfg-* files really *are* identical except for the DEVICE and HWADDR lines. The /etc/udev/rules.d/70-persistent-net.rules file correctly maps the interfaces to the MAC addresses. So why does my antique ORiNOCO card work and thew newer ones fail? How can I track down what's being done wrong/not being done?
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Jun 29, 2010
I have an Ubuntu install on an 8Gb SDHC Card, customized for my Toshiba NB205. It took quite a bit to get sound and BT working, but now it's fine. Just out of curiousity, I used this same SDHC Card to boot my Dell D610 -- it booted, and sound and WiFi worked fine. I was surprised. There was a single error message after the desktop appeared, but I didn't record it.
I am now wondering: is it practical to use a single USB installation with multiple devices? I can imagine a number of complications, but was surprised that my attempt worked on two very different hardware platforms. There was discussion, when pendrives first appeared, of being able to use one to boot any PC to your own USB-based OS, bypassing any other OS installed on the PC.
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Jul 12, 2010
I have 2 devices I'd like to be able to sync to without going into preferences and changing options each time. That is I'd like to just click "device>sync episodes" and have it sync to both devices automatically.
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Jul 23, 2011
I am using Ubuntu 10.04 LTS - the Lucid Lynx. I am using the laptop to play video files and view it on TV using HDMI output. No problems. Requirement: to play simultaneously a different media file and be able to listen through say headphone / laptop speakers. While a movie audio is only heard on TV, other audio is heard only on laptop speaker.
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Aug 25, 2010
I have a broadcom wireless card in my laptop and as far as I know, it acts as an USB device. I also have one USB stick wireless device (TL-WN422G - uses ath9k_htc driver) which I want to use at the same time as the first (Broadcom) device.
The problem is, after I load ath9k_htc - iwconfig does not show the new USB device (the TL-WN422G - wlan1 / ath0 / whatever), but only the old one (wlan0 - Broadcom, checked by MAC).
I tried this USB device (TL-WN422G) on my other computer that has PCI wireless card in it, and they both worked just fine together after I pluged it in... I get wlan0 (Ralink) and wlan1 (TL-WN422G). Is it some kind of a problem for the laptop that both devices are recognized as USB? How do I make wlan1 appear on my laptop?
also, my system is fully up to date 2.6.35 kernel (Arch)
edit: I've already downloaded the needed ar9271.fw from linuxwireless.org and I put it into /lib/firmware - something wrong in that?
dmesg gives me this on laptop:
usb 1-5: new high speed USB device using ehci_hcd and address 9
usb 1-5: ath9k_htc: Firmware - ar9271.fw not found
ath9k_hif_usb: probe of 1-5:1.0 failed with error -22
[Code].....
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May 16, 2010
I'm trying to build a custom setup that requires a flash drive and a CD to both be mounted to root. Applications, boot data, and other static directories are on the CD, while /home, /opt, and /tmp are on the flash drive. Is there a special option I can enter into fstab to allow this? If not, I intend to modify my kernel to allow this, but I'll need to find the sources that control this function.
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