Ubuntu Networking :: AT&T 2Wire Router Will Not Work Without Ac Power On Laptop?

Aug 1, 2011

I just installed 11.04 on my laptop and the wireless works fine connecting to a AT&T 2Wire router when the ac power adapter is connected. When running on battery power I stay connected to the router but barely any information is transmitted. ie. if i restart the router connection on my computer I can load a web page like google.com then nothing else will work unless I restart the connection again. If I am right next to the router it will continue to work but very slow ( takes about a minute to load ......com when it only takes 2 seconds on ac power ). When I run windows 7 everything works fine when on battery power.Also every thing works fine on a linksys router with ac and battery power.Dell Inspiron 14R Processor: i5-2400MWireless Card: Intel Centrino Wireless-N 1030Ubuntu 11.04 Natty Narwhal

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Ubuntu Networking :: Sporadic Connection To 2wire Router, All Other Routers OK

Sep 7, 2010

One day I lost my WiFi connection while doing nothing particularly interesting. OK then...I investigate, and I find that it only connects occasionally, and when it does, even then it will render a page almost none of the time. I can't even ping anything. I tried going to the router's config page ( for this one) and found that even that won't load. I power cycled the router, and it did nothing. I thought that the router was dying, but I realized when I switched to Windows 7 (this is a dual boot machine) it works fine. Also, when I went back to Ubuntu and tried connecting to a neighbor down the block's WiFi, it also works fine (this is what I'm using to post this message.) I did all I could to fix this, even to the point of dismantling the machine and moving cards around and such, but it did nothing. I finally formatted my Ubuntu partition and reinstalled, and it also did nothing. It also doesn't work from the Live CD. The router works fine on all the other computers in the house, wired or wireless, and also my phone and PSP's.

While connected, in Firefox, sites sit at "looking up", "waiting for", or "connecting to". It seems to be at random which one. They all time out, none of them say server not found. I thought it was a DNS problem, so I tried some DNS's I know (Google's, OpenDNS, DNS Advantage etc.) but it did bupkis.One thing I notice is that while connected, I have a fantastic signal strength of about 85%, when before any of this happened, it was more around 70%. I didn't move the antenna anywhere or anything having to do with the reception. Also, once connected, it stays connected, it's just getting it initialized that's the problem, but even while connected it doesn't seem to work well.

This is incredibly frustrating, as I did not change anything with the router at all, in any way shape or form. It just spontaneously decided to not like Linux. The router's model is 2700HG-B.Could it be that my wireless card is dying? I've had the thing for 6 years, and had no sign of it failing. I'm thinking that can't be it because it works with the same computer and network, but with a different OS. Could there be something wrong with the Ubuntu driver for my card, ath5k? I was going to say there's something up with wpa supplicant, because I use WPA-PSK for authentication, but I turned that off from another computer and it still does not work.

Again, the problem is that Ubuntu works with every router I can connect to EXCEPT mine, and Windows 7 on the same machine works with the same router. My router works with every other device in the house. I have changed nothing networking related, and even reinstalling Ubuntu did nothing. I would try it with Ubuntu on another machine, but my machine is the only wireless one in the house (and I can't put Ubuntu on the wired ones, that would PO some people),and I would try it with a different wireless card/USB thingy, but I don't have another one.

EDIT: I got some other Live CDs out, I tried Kubuntu 10.04, and Ubuntu 9.10. NEITHER WORK!

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Networking :: Cannot Connect To Internet With AT&T 2WIRE Wireless Router

Oct 4, 2010

AT&T will not help. I am trying to connect with Cable (CAT5). When I try to configure my network card with YaST here is the message received. "Unable to configure the network card becasue the kernal device (eth0, wlan0) is not present. This is mostly cause by missing firmware (for wlan device) See dmesg output for details"

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Ubuntu Security :: Hidden Backdoor In AT&T 2Wire Modem/Router?

Aug 11, 2011

My 2Wire router/modem I got from AT&T for my DSL has port 3479 TCP open and I can't figure out how to close it. It's open to the entire internet. From a quick google search it's some port AT&T can use to update the modem's firmware or something.Consider how in bed AT&T is with government agencies it seems like a easy way for the government to get into my home network just by using what seems to me a backdoor put there by AT&T. Anyway to close this or secure it. Right now I'm using the hardware as my main router for my home network. I have Linsys I modded with DD-WRT. I'm thinking of re-configuring my network to use the DD-WRT router as the main router and the 2wire just as a modem. The 2wire is a hybrid modem/router and I'm kind of lazy and don't feel like re-configuring my entire network if I can just close the port.

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Networking :: Set Up A Laptop As A Router To Connect Wirelessly To ADSL Router?

Nov 6, 2009

I have a desktop PC running Ubuntu 9.10 and Windows 7, and a Eee PC 701 laptop running EasyPeasy Ubuntu 9.04. I'd like to connect the desktop to the laptop with a wired connection (eth0), then the laptop to my ADSL router using wireless (ath0).

I have a crossover ethernet cable (I bought on ebay). I have set up my laptop with a static IP address on my LAN and it uses OpenDNS.

I have added this to /etc/sysctl.conf on the laptop:


Then I tried this on the laptop:

sudo iptables --table nat --append POSTROUTING --out-interface ath0 -j MASQUERADE
sudo iptables --append FORWARD --in-interface eth0 -j ACCEPT

This is a variation on what I found on other sites describing how to set up a router. I don't understand iptables very well, but I gather that the above two lines should set up forwarding so that traffic from my router to the laptop will be forwarded to the desktop, and vice versa.

But this doesn't work. The connection doesn't even establish between the laptop and the desktop.

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Ubuntu Networking :: Refresh Network After Power Failure On Laptop?

Apr 24, 2010

have Karmic Coala runing on an IBM thinkpad X.41. Works great. My home network is all ethernet so I have a router , CAT5 cable to laptop.A coupleof times I've had power outages The laptop carries on as it's on battery power. When the power comes back , the router restarts, it reconnects after a few minutes but the laptop doesn't reconnect to the network seamlessly. On some other Linux distro's I've had running /etc/init.d/network restart will refresh everything. On Ubuntu I have /etc/init.d/networks but running restart In the end I needed to reboot the laptop to get the network back on.Perhaps this is a power management issue with the laptop ethernet card i.e losing power powers down the card and it never comes back up properly.

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Ubuntu Networking :: WiFi Disconnects After AC Power Is Unpluged From Laptop?

May 11, 2011

About 20 seconds after I unplug my Laptop from the AC adapter myiFi connection disconnects. The only way to get a connection again is to shut down my laptop and remove the battery and the AC adapter (WiFi-adapter reset) and reboot my laptop. I'm running 10.10 32-bit.lspci shows me these information about my WiFi-Adapter

02:00.0 Ethernet controller: Atheros Communications Inc. AR5001 Wireless Network Adapter (rev 01)
Subsystem: Device 1a3b:1026


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Ubuntu Networking :: Server, When Wake On Lan Is Preformed, Cannot Power Off Laptop?

Aug 1, 2011

I have just installed ubuntu server 10.04 LTS on a laptop, and I would like to control it remotely.When I manually turn on the computer I can successfully use SSH commands to turn it off. But when I wake on lan turn it on, it doesn't power off. It hangs on a black screen where the fan and the hard drive seem to be off, but the ethernet light is on and so are all the computer lights.

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Ubuntu Networking :: Cannot Connect To Router With 3rd Laptop

Feb 6, 2010

I have a router with 2 IBM Thinkpads connected. One Thinkpad is running Ubuntu, and the other is running XP.

They connect to the router with no problems.

I installed Ubuntu on a Sharp Moebius laptop and plugged in the network cable.


I have tried pinging the laptop; nothing.

I am not sure where the problem is, because my Thinkpads have no problems connecting to the router, with both Ubuntu and XP

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Ubuntu Networking :: Use Laptop As Wireless Router

May 11, 2011

i wanted to know if i can use my laptop as a wifi router; with encryption password and all security so if another computer is in the range can detect the signal and then try to connect to it with the encrypt pass.

also i have one more doubt. can a wireless router be used as a wifi ethernet card and detect wifi signals nearby and connect to internet. suppose i have a wireless router and i connect it to my desktop(with lan cables) which has ubuntu installed, and theres a wifi connections nearby can i connect the desktop to the internet.

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Ubuntu Networking :: Unplugging Laptop From Router / Can't Connect Again

Mar 12, 2010

I've not changed my configuration, but after temporarily unplugging my laptop from the router, I can no longer persuade it to connect again.Have restarted it repeatedly, but to no avail.A similar problem has been occurring with my Huawei 3G Dongle which has suddenly started behaving.Are there any troubleshooting guides for the Network Manager's wired connections? Don't know where to start.

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Networking :: Setup Laptop Running Ubuntu 10.04 Into Router?

Jun 18, 2010

\How can i setup my computer (currently running Ubuntu 10.04 lts) into a router so that other laptop can have a wireless connection to it and be able to access the Internet?

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Ubuntu Networking :: 2wire WiFi Connection In 10.04?

Jan 9, 2011

I'm brand new to Ubuntu, and Linux in general, and honestly don't know what I am doing. I installed Ubuntu 10.04 on my external hard drive and am able to boot fine (other than an issue with my monitor falling asleep because my graphics card needs a different driver. I have a work around for this that i'm currently using but I would like to fix it permanently and thus need an internet connection.)

When trying to connect to the network in my home, I am unable to. I click on the WiFi symbol in the top right corner, and I can see my network. I then click it and a page comes up asking for the key. I put it in but it doesn't sync and usually after a minute or so it pops back up asking for the key again.What can I do to gain internet access? I'm unable to connect my computer via a hard wire Ethernet cord and need to sort out this WiFi issue.

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Ubuntu Networking :: Laptop Going To Sleep Disconnects Wireless At Router

Jan 21, 2011

Running Ubuntu 11.04 on a Gateway LT3103U netbook. It's running fine except for that fact that when it goes to sleep (timeout or lid closed) or going into suspend or otherwise restarted/shutdown, my router restarts. It's a DLink DIR-655 that has been working fine until I changed this netbook to Ubuntu.After installing Ubuntu on the netbook, it found my SSID being broadcast and I added the connection by supplying the WPA2 password. I have full network access (local and internet).

It's just the router restarts and all my other machines lose connections. The router is using DHCP but supplying IPs based on MAC. Netbook is set to use DHCP.

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Ubuntu Networking :: 2wire Prodigy Infinitum Not Detected?

Jul 1, 2010

I got a Dell Inspiron with Windows 7, i instaled Ubuntu 10.04, and a can't get connected to internet, en my NM icon doesn't appear the wireless conection i have in my home, it is a 2wire router from prodigy infinitum.

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Networking :: Networking Config For Desktop/Laptop Through Router

Jan 6, 2011

My Desktop is wired through eth0 to my wireless router. The router is connected to the internet. the ipaddress leased to my desktop was done with dhcpcd. My laptop is connnected to the wireless router through the wifi card known as device eth1 and i used dhcpcd for that also. How can I network my laptop via wifi through the router to the Desktop?

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Fedora Networking :: Laptop As A Router/Access Point?

Apr 12, 2009

I'm sure that some of us techies have found the need from time to time to have a portable wireless bridge (see ascii art below) on our jaunts into the big bad user-woods, and I am here to ask the question of HOW to pull this off, with the least installation/configuration possible, as my tech lappy is also my main computer. What I want to do is this:

(ISP) -> (wlan0 - [MyLappy] - eth0) -> (Client computer)
Basically, thats a mess, so i'll explain it further:
wlan0 grabs the netz, and a computer connected to eth0 via switch/router/crossover cable can access those netz.

1. No configuration on the client would be prime choice rib for me.

2. Client should be any OS/Arch.

Any grand ideas out there? Currently using FC10, with various extra repos enabled.

Oh, and N00by alert, I'm learning quick, and am not shy to try new/complicated things, just bear with me!

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Networking :: Linux OS As Router / Surf The Web Both On Computer And On Laptop?

Feb 20, 2011

I have two network cards in my computer (Debian). One (eth0) is connected to the router which is connected to the internet, the other one (eth1) is connected to my laptop (Gentoo). Now I want to surf the web both on my computer and on my laptop. I obeyed some tutorials "Linux as router":

1. On my Debian system IP-Forwarding is on:


takada:/home/sam# sysctl net.ipv4.ip_forward
net.ipv4.ip_forward = 1

2. Laptop has IP and this is the output of 'cat /etc/network/interfaces' on my computer:


takada:/etc/network# cat interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface

But a ping from my laptop to (router to internet) still gives:

connect: Network is unreachable

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Networking :: 3 NIC - Router - PC Cannot See My Laptop And Vice Versa - Cannot Ping - Host Seems Down

Jan 25, 2010

I have a machine running linux with 3 ethernet interfaces attached.

My Ifconfig:

My route output:

eth0 is attached to a laptop, eth1 is attached to a PC. eth2 is attached to a DSL modem, and the server is successfully acting as my internet gateway. The trouble is, my PC cannot see my laptop and vice versa. E.G. cannot ping, host seems down.

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Ubuntu Networking :: Using PC As A Router To Share Internet: Laptop Connects But Desktop PC Doesn't

Oct 15, 2010

Since I have 3 Network cards in my Desktop PC I've configured it to act as a Router using GNU/Linux Ubuntu Lucid in combination with Samba so I could share my internet connection. It works on any laptop a connect to it using any of the network cards ports [regardless of the operating system installed on the Laptops], but when I plug that same network cable to any Desktop PC [regardless of the operating System installed] it doesn't even light the LED in the netcards. From the Client PC seems like nothing is plugged in the the netcards.

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Ubuntu Networking :: Unable Connect Dell D630 To ATT 2Wire Using WPA Authentication?

Aug 26, 2011

make a wireless connection to an ATT 2wire router ESSID called "WIGGERS" that I do not control. My Dell D630 does connect successfully to other WPA broadcasts. I am running Natty (11.04) with the default Unity interface.iwconfig does see "WIGGERS", but the Network Connections application on the menu bar eventually times out and asks for the authentication code. When I put in the code, it still does not connect.I do successfully connect to "WIGGERS" using another laptop running Win XP so I know the code is correct. The Windows machine indicates that it is using:etwork authentication: WPA2-PSK Data encryption AESSomething that may be causing the problem is that the router is apparently putting out two signals (see iwlist output below). Both Cell 01 and Cell 02 have the same ESSID.Below I have pasted output from lspci, iwconfig, and iwlist:

Latitude-D630:~$ lspci -nn | grep 0280
0c:00.0 Network controller [0280]: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection


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General :: Laptop As Router Between Wireless Router And Windows 7 Box

Aug 7, 2010

I'm using a cross-over ethernet cable to connect a Desktop Windows 7 box, and a laptop running on SUSE 11.2. I want Windows to connect to the internet via the laptop's wireless interface.

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Networking :: Cannot Connect Wireless Laptop/XP Hyper Terminal To Server On WRT54G Router

May 20, 2011

Linksys WRT54G Wireless
Laptop wireless Windows/XP
Windows/XP Hyper Terminal

Desktop Server Linux OEL 5 (not wireless) cable connected to the WRT54G router port. (I can go to the Internet with this server, but not able to communicate other computers on the WRT54G Wireless Network. Even though, the Linux Server is connected to the WRT54G router port.) From the Hyper Terminal Wireless laptop Windows/XP, I want to connect to my Linux Server.

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Ubuntu Networking :: Router Won't Work On Wireless?

Feb 18, 2010

last night as a download was going the Internet just stopped connection. Then asked me for the WPA & WPA2 personal password. I didn't know what to put since I had already tried multiple pass words I restarted the router.Now for some reason the computer won't pick up the router wireless signal. It picks up multiple connection's around my area so I know that it's not the wireless card. The router is connected via ethernet at the moment so I know the internet works.Do I have to find the ssid? Maybe the router reconfigured it's self when I restart it and broadcasting mode turned off... I just don't know

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Ubuntu Networking :: Internet Connection Will Not Work Even Via Router

Jun 9, 2010

Every time I turn on my ubuntu box, it somehow kills our internet connection... yes, even through the router. The internet will not work until I call tech support and they run a line test. Then it works again as if by magic. I'm at a loss. A friend suggested maybe ubuntu is trying to establish itself as the dhcp server on the network? I have ubuntu 9.04, 32-bit, workstation.

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Ubuntu Networking :: Acer Aspire D260 Wireless Will Not Work Off Of A/C Power Adapter

Mar 21, 2011

I recently installed Ubuntu 10.10 onto my Acer Aspire D260 netbook.I find it much easier to use than Windows 7.Everything has been working fine until I recently tried going on the internet via battery power instead of my A/C charger. My update manager is showing that I am up to date and Additional Drivers is showing that the Broadcom STA wireless driver is installed and in use.

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Ubuntu Networking :: Ping To Router For New HP Laptop - "could Not Connect"

Aug 9, 2011

I recently bought a HP laptop which is showing some issues. To make it precise:

1. I can connect to ethernet & wireless when i am at my university, which are quite good connections.

2. At my home, i share the internet with another guy. The connection is not very stable, in the sense that, sometimes the download speed is 1MiB/s, and sometime 250 KiB/s. I have a old laptop which can connect to it without any problem.

3. My new laptop can connect to it when the connection is better with download seed ~1MiB/s, but could not connect to it when the download speed goes down.

4. "could not connect" means even ping to router takes long time with 90% packet loss. But I can always get connection and ip address from dhcp although i can not ping thereafter. This is true for wired & wireless connection both. Is that a router issue? but then, why can i connect through the other laptop.


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Ubuntu Networking :: Laptop Is "unknown" For Router?

Feb 13, 2010

Any Ubuntu system that connects to my router (Netgear Super Wireless ADSL Router DG834GT) does not acquire a host name on the network. The router reports the IP, and "unknown" as the "device name". As a consequence, the PC can only be reached over the intranet using an ip address, not using a hostname.My mybookworld network drive, that also runs a flavour of linux, does appear to my router with the name "networkspace". This must therefore be a network configuration issue of Ubuntu.I have a hostname set in my Ubuntu system.

vanadium@vanadium:~$ hostname


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Ubuntu Networking :: Getting My Wireless Printer To Work - Unknown Device Connected To Router

Apr 27, 2010

I had previously been having loads of problems getting my wireless printer to work with Linux [http://ubuntuforums.org/showthread.php?t=1453697]. Everything is working fine now. However, something that confused me is that whenever I tried to ping the printer _before_ I got it working, it would fail with a _different_ IP address. That is, the command 'ping x.y.z.3' would fail with a message saying it was unable to contact 'x.y.z.2'

Now I am looking at my router - for something unrelated - and I've noticed that rogue IP address shows up in the list of connected devices. It has a MAC address but for the device name it lists "<unknown>". Should I be concerned about this? how to figure out what this device is?

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Ubuntu Networking :: Cant Get Wireless Work On Laptop With 10.10

Jan 10, 2011

I cant get wireless work on my laptop with Ubuntu 10.10 Machine Brand and Model (PC/Laptop): Forcebook Her some outputs:

$ lspci
00:00.0 Host bridge: VIA Technologies, Inc. CN896/VN896/P4M900 Host Bridge (rev 80)
00:00.1 Host bridge: VIA Technologies, Inc. CN896/VN896/P4M900 Host Bridge
00:00.2 Host bridge: VIA Technologies, Inc. CN896/VN896/P4M900 Host Bridge


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