Managing and using network connectivity on a Ubuntu system

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Wired network connection fails after installing Ubuntu 12.04

Having installed 12.04 amd64 desktop from the alternative ISO (I'm using LVM on a RAID5 array), my networking fails after booting into the installed system. It works fine on the 12.04 Live CD and ...
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2answers
2k views

WIFI looses connection with AR9285 - have to disconnect / connect to regain internet?

I have a G73JW laptop using Ubuntu 12.04. It has an Atheros AR9285 card. While wifi seems to work fine most of the time, about every hour or two it will loose the connection to the internet. The ...
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1answer
1k views

Can i change the network section of my conky to support my wifi?

So I've been having fun with setting up my new conky which I downloaded recently (i'm running Ubuntu 12.04). I am having a problem with the section of the conky which measures network parameters. ...
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2answers
4k views

Why is Ubuntu unable to connect to my wireless router? [closed]

I have just installed the latest version of Ubuntu and I want to connect to the Internet using my wireless router. I tried using Ndiswrapper but I received errors. I also tried using suggestions in ...
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1answer
2k views

Find MAC address of a device connected to my computer

I have a "black-box device" (a credit card reader, to which some klutz lost the admin unlock card...) running an unknown, but primitive, operative system. I need to find it's MAC address. At my ...
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1answer
2k views

Why can't I connect to unsecure open wireless networks?

I have an open, unsecured router which I can connect to without any issues while in Windows. When I am in Ubuntu, if I click on my wireless manager to see all the networks, then it shows all the ...
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2answers
6k views

Extend Desktop to Monitor over LAN

I want to make use of an old laptop by extending my the desktop from my main PC onto the monitor of this other, old laptop over a LAN connection. I've looked into Xdmx/dmx, but the project seems to ...
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1answer
8k views

How to make ad-hoc network connection? [duplicate]

I can't make ad-hoc from my netbook (Ubuntu 12.04). It has internet source from ethernet. I have tried making from network manager. But it always says 'Wireless Network Disconnected' and can't be ...
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1answer
923 views

How to share a tethered iPhone internet connection with virtualbox guest os (Win XP)

I mostly connect to the internet via a USB iPhone tethered connection (MyWi app). I have just installed Windows XP guest OS via Virtualbox. How do I connect the guest OS to the internet via my ...
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1answer
4k views

Facebook access problem, on Ubuntu only [closed]

I have a problem to open any facebook page, it is wierd because on the same computer on Windows 7 I can open facebook and on other devices connected to the same network. But if I connect my computer ...
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2answers
5k views

Adding a network folder to Clementine library

I have 2 machines running Ubuntu. One of them contains a music library on its windows partition. I can connect to that computer's music library via 'connect to server' and save that location as a ...
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2answers
1k views

Why is Mobile Broadband connection not shown in the Network Manager in 12.04?

I have created a Mobile Broadband connection using Bluetooth in Ubuntu 12.04 but it is missing in the network manager icon on the top panel of the desktop. How should I solve this problem? When I ...
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1answer
2k views

Operation times out trying to SSH outside LAN i.e. from internet to LAN no connection is established

I run Ubuntu 12.04 and have no success connecting with SSH from "Internet". The router is a TL-MR3420 which is set up to forward requests to one of the NIC's on ubuntu machine (which has in total 3 ...
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1answer
1k views

Ubuntu 12.04 slows down wireless network

I am using Ubuntu 12.04 and my husband is using Windows 7. Ever since I installed Ubuntu, when my computer is on it slows down the entire network (when we are both connected wirelessly). We have ...
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2answers
9k views

Virtual interface shows up in ifconfig but no connections can be be made to it. What is wrong? [closed]

I have a VPS set up with Ubuntu 12.04 on it and am having trouble getting a second IP set up as a virtual interface. I've configured the interface as you can see from my /etc/networking/interfaces ...
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4answers
3k views

Ubuntu 12.04 and Hyper-V 2008 R2 SCVMM - Network cable unplugged [duplicate]

After attempting to install Ubuntu Desktop 32bit on our HyperV environment - which requires static IP addressing, Ubuntu thinks the network cable is unplugged. It's connected to the correct Team NIC ...
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1answer
1k views

IPv4 Address Sharing Issue? Trying to map IPv4 address from host OS to BT5 VM [closed]

I'm having a general networking issue in regards to my Backtrack 5 (x64) KDE VM in VirtualBox. The VM appears to be on a separate subnet, but for my purposes, I'd like to include the VM in the private ...
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2answers
2k views

What is the purpose of `dnsmasq` running listening on `127.0.0.1` interface?

I discovered an instance of dnsmasq running on my fresh install of xubuntu desktop. The general purpose of dnsmasq is known to be a DNS relay and DHCP server. The running process is reported as ...
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3answers
26k views

Proxy exceptions in 12.04 LTS

How do I setup proxy exceptions under Ubuntu 12.04? Already tried the proposed solutions for earlier Ubuntu versions and none seem to work. There is no Network Proxy Preferences in 12.04 AFAIK. ...
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1answer
1k views

Ubuntu 12.04 not recognising my new wireless “super hub”

I'm fairly new to Ubuntu, and this is the first time I've reached out and asked for help. Please let me know if you need any more information. I did a clean install of Ubuntu 12.04 (64-bit) ...
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1answer
2k views

mobile broadband issue in 12.04

I installed 12.04 few days back . and mobile broadband ( Reliance netconnect+ ) was working fine . However since yesterday, it is not working ... mobile braodband option is disabled and not enabling ...
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0answers
910 views

Why is 12.04 slowing down my home network? [closed]

I have two PCs on my network; one is a Windows 7 PC and the other is running Ubuntu 12.04. My PC is the one with Ubuntu and it is slowing down the network not only for me but for my husband as well. ...
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1answer
1k views

slow wired connection (dns issue?)

I had Ubuntu 11.10 previously with no connection issues. I reformatted (I didn't upgrade) and installed Ubuntu 12.04. Now web pages take a long time to start loading. When I visit google.com it can ...
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3answers
9k views

Can't connect to MS Windows share after switching to 12.04

In 8.04, 9.04, 10.04 and 11.04 I have been able to connect to a Windows 2003 server. It has been simple and effective. Since loading 12.04, I can't do it. The error highlights the password (which ...
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1answer
530 views

Unable to ping et1 - routing issue

I have an UBUNTU server VM installation with two NICs. eth0 is on the LAN network, configured by DHCP and is working fine. I manually configured eth1 with a static IP on the DMZ network but can't ping ...
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1answer
7k views

Where do I modify the CUPS printer configuration?

Our systems people want us to configure the network printers via CUPS. I am using Ubuntu 12.04 and I cannot see how to set up the printers in the graphical menu. The instructions I got are the ...
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1answer
1k views

Ubuntu 12.04 under VB 4.1.14 — ping resolves domain, but wget fails

With a vanilla install of Ubuntu 12.04 on a vanilla install of Virtual Box with NAT on VB, my network settings seem to function incorrectly. What baffles me is that I can ping www.google.com, but I ...
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0answers
2k views

Wireless on an Acer Aspire 1810T with an Intel 5100AGN works for less than a day, then stops working until reboot [closed]

I am running Ubuntu 12.04 on an Acer Aspire 1810t with an Intel 5100 AGN wifi card that has performed flawlessly on Ubuntu 10.04. I assumed the stellar wireless support would continue with 12.04 but ...
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1answer
246 views

Why doesn't networking work after upgrade from 11.10 to 12.04?

After the upgrade to 12.04, networking is down. I can ping my router, but that's it. (This is a wired connection, not wi-fi). Manually running /etc/init.d/networking restart does not help. I ...
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1answer
2k views

Can't find wireless networks - Netgear WN311B, 12.04

I'm using a Netgear WN311B PCI wireless adapter on my desktop. The device works without problems under Windows (dual boot). I have enabled the Broadcom STA wireless drivers in "Additional Drivers". ...
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1answer
182 views

upgraded - now network not connected

Recent convert to Ubuntu after teaching Comp Sci using windows. Two machines connecting through ADSL modem. Just upgraded the Toshiba A100 laptop to 12.04 and now it says network not connected. My ...
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1answer
5k views

Printer not visible over network between 12.04 machines, Printer properties reports “Not published. See server settings”

I'm attempting to share a USB attached printer connected to one 12.04 machine to another 12.04 machine (and a 10.04 machine) on the same network. The printer does not show up and cannot be found as a ...
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1answer
1k views

Ubuntu server on LAN but can't get to internet when other pc's can

I have spent over 32 hours tyring to solve this problem. My ubuntu 10.04.4 server has postfix/dovecot etc and has been running fine up until 5/3/2012. My symptoms are I can SSH to the server ...
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2answers
1k views

How do I get internet access in my kubuntu 12.04 virtual machine using NAT and a wireless connection?

I use virtualbox 4.1.14 directly from the developers including the extension (not the ppa) on an ubuntu 11.10 system. I try to access the internet from the kubuntu live cd that I have booted inside ...
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1answer
451 views

how to permanently turn off wired network in ubuntu 12.04

I'm using Ubuntu 12.04 64 bits with wireless. But every time the computer starts up it is trying to connect to wired network, even if I'm already connected to wireless every 10 of 15 minutes it is ...
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1answer
415 views

After running 12.04 from Live USB, Windows 7 installation cannot load network drivers

So basically yesterday I downloaded the 12.04, And I created a Live USB, And booted it on my Laptop. Everything was great, Everything worked. Then I needed to do something on windows, And when I ...
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2answers
2k views

Artheros AR9287 Txpower

I'm using Ubuntu 12.04 LTS on my Aspire 3820TG which comes with an Artheros AR9287. Somehow the Wireless performance is to put it mildly sub-optimal. I thought it might have something to do with the ...
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3answers
3k views

Packet loss with Ubuntu 11.10

I have a machine with Windows 7 and Ubuntu 11.10 In Ubuntu I have about 30% packet loss when I make pings either to my router gateway or to an external site such as google.com, so my internet ...
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1answer
2k views

lshw not showing network

Output: {User}@{Computer}:~$ sudo lshw -class network {User}@{Computer}:~$ Another Test: {User}@{Computer}:~$ lspci 00:00.0 RAM memory: NVIDIA Corporation MCP61 Memory Controller (rev a1) 00:01.0 ...
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2answers
8k views

Route all traffic through SSH tunnel or equivalent? [duplicate]

Possible Duplicate: How do I route my internet through a SSH tunnel? I just got a new laptop and put Ubuntu on it as a good way to force myself to learn Linux. This laptop will be going ...
0
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1answer
377 views

How do I blacklist a hardware item before reboot through the Wubi Win interface?

specifically I need to blacklist b43 broadcom adapter so my installation will stop crashing, but the accessibility button on the windows portion of the setup does not do what it does from a live cd ...
2
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1answer
458 views

DHCP server doesn't assign network dns to other hosts on my network

I had a problem with my DHCP but I managed to fix it. Now the network starts but I have a problem with DNS. Clients in the network don't get any dns from my DHCP. My network works as follow my I ...
6
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1answer
9k views

SSH into Ubuntu VM remotely

I dont have much experience on networking or linux, but I'm trying to ssh into an Ubuntu virtual machine from outside my home network. The Ubuntu virtual machine (VirtualBox) is running an a Debian ...
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1answer
149 views

system monitor shows downloading while lsof -i says nothing downloading

when i checked system monitor it says there is something downloading but lsof -i showing nothing. http://i47.tinypic.com/1zqadm9.png my ISP provider allows me to connect to a single host at a time. ...
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0answers
816 views

How can I tell Ubuntu to keep the correct routing table?

Ubuntu sets a wrong routing table if the router is switched off and on again: Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.1.1 0.0.0.0 ...
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2answers
2k views

IP address change won't take effect

I use static IP adresses. When changing the IP of a network interface (eth0 or wlan0) the settings are saved to the network connections but when running ifconfig or looking at Network Settings, ...
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1answer
150 views

Should I ever worry about router compatibility?

Assume I'm getting a new router. I've never heard of any problems like this, but is there reason to fear some routers might not work well with Ubuntu? If so, which types?
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2answers
7k views

Wired Connection Problem on a Lenovo Workstation e20

After upgrading to 12.04 my interent connection no longer works. More precisely it is really, really, slow, and occasionally will connect, but do so only for a few moments and then disappear again. I ...
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7answers
26k views

Restarted computer during update; “the system network service is not compatible with this version”

Yesterday I upgraded my Ubuntu by SSH but before I finished it, I restarted my computer. I know that was not very smart. Anyway now I don't have internet connection, the WiFi or Ethernet is not ...
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1answer
1k views

Unable to access network. How do I install the wi-fi drivers for my laptop?

I'm typing this with a laptop containing windows 7 in the hard drive, but I use my 500gb hard drive with ubuntu 12.04LTS on it as well. I can't seem to connect to the internet through ethernet due ...