Ubuntu Networking :: Lost Internet Connection - Firefox Displays Server Not Found Page
Apr 6, 2011
I have been using ubuntu netbook 10.10 on my Dell Mini 9 for the past few month without any problem; it connects wirelessly to the internet via a wireless router. Yesterday in the middle of web surfing, suddently firefox cannot see any website outside of my home network (Firefox displays Server not found page). No help when I rebooted a few times and connect to my home network via wireless or even wire cable; it can access files in my network file server (DNS-321) but not the internet. My desktop computer running Windows Vista and ASUS media player has no problem accessing the internet.
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May 10, 2011
On a school network the Windows and Mac computers connect to the internet with no problem. The Ubuntu(10.04) computers are connected and work on the internal network but have major issues going out of the building. I can get to one or two webpages to open and the connection dies...Server not found. Ping within the network and there are no lost packages, if I ping outside many lost packages.
We are using SonicWall and think it could be blocking...but why only Ubuntu? This is the same behavior for Firefox and Seamonkey. It's also the same for the thin/fat clients and standalone units. I did try a fresh install with no effect. The internet actually works on the one machine with ubuntu 9.10. I brought a machine home and it connected to the internet with no problem.
Two things I can think of that would of caused this are:
1- we keep getting windows about missing applets, someone may have clicked delete
2- I connected a server to run fat clients w/ LTSP and discovered my server and the schools were handing out the same ip's.
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Jan 23, 2010
I am running ubuntu 9.1 on a Dell Dimension 2400. After installing ubuntu on the pc, it was automatically recognizing my router and connecting to the internet fine via ethernet. Then, my roommate unplugged the router and it won't recognize it. I can't access my router settings, and ubuntu is recognizing it as "inactive" but every other computer in the apartment runs fine. My PC uses a broadcom ethernet controller, and my router is a Linksys wireless N.
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Jul 25, 2011
I was running 8.04 and my internet (Comcast) comes via a Motorola SB5100 cable modem then into a Netgear router then into my Dell. When I upgraded to 10.04 yesterday, I lost the wired connection. The wireless connection still works fine, but I have not been able to get a wired connection. Also, most online solutions reference the Network Manager, which is nowhere to be found.
Anyone have any solutions? I would be willing to revert to 8.04 if needed, as that worked fine, and obviously I quite regret the upgrade!
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Mar 16, 2010
As I view it, Ubuntu has a great security risk in that it still allows internet access when the VPN connection has been lost, for whatever reason. As it is now, when the VPN connection fails you get bumped back to using your regular IP, and whatever you are doing becomes transparent to anyone watching. This is simply unacceptable for an allegedly secure platform. Does anyone know of a way to fix this with a script/program, or is there a distribution/OS that allows this? Windows re-dials the vpn automatically, but still allows internet access in the mean time.
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Nov 24, 2010
I am a non-techie, have been gratefully using Ubuntu 8.10 for a few years for the basics: email, web, documents, photos. I have somehow lost my internet connection, but strangely my email still works...!?!? My router is showing all the correct green lights, but I cannot get to any url. I am posting this thread via work (windows) pc. I have searched on this forum and in anticipation have done as much homework as possible, see below.I have a Netgear wired router. I cannot find Network manager on the menus and tried this from the terminal:
Code:
network-manager
bash: network-manager: command not found
networkmanager
[code]....
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Apr 23, 2011
I do have a problem with my internet connection at home, I've a Huawei router and ubuntu 10. When I connect to the internet whether wireless or wired I become able to surf the internet for less than 10 min then it cuts off! and to be able to surf it again I need to restart the whole system!
I used this command to restart the networking but in vain
Code:
sudo /etc/init.d/networking restart
On windows I do not face this problem with the same internet connection. I do not face it either when I'm using my campus wireless connections using ubuntu/windows!, so the problem is related to my home connection+ my OS.
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Apr 24, 2011
Like the title says, is there a way to restart the computer if the internet connection is lost?Is this possible on ubuntu?
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Dec 8, 2010
We have an Asterisk machine that we suspect periodically loses internet connectivity, causing all calls to drop. First, would this sort of thing be logged anywhere out of the box? I haven't noticed anything in /var/log, but that doesn't mean it's not there. If this is not typically logged, how I might go about logging it? I'm currently running a bash script from cron every 5 or 10 minutes which pings Google and writes success or failure messages to a log file. This works fine for extended outages, but if the internet connection drops and comes back between cron runs, it won't be caught.
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Mar 15, 2011
I setup a web server on Suse 11.3 using the "Perfect Server" tutorial on HowtoForge with Ispconfig 2 everything works accept php. Pages only display the page code. Here is the output of the " php -r 'phpinfo();' " command
Code:
phpinfo()
PHP Version => 5.3.3
System => Linux vserver2 2.6.34.7-0.7-desktop #1 SMP PREEMPT 2010-12-13 11:13:53 +0100 x86_64
Server API => Command Line Interface
Virtual Directory Support => disabled
[Code]....
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Jun 16, 2011
I installed Fedora today, and I automatically had internet connection, I never had do configure anything myself. Then, I was playing around with VPN for a good while (trying to set up the VPN connection to my University), and now, I suddenly lost my connection to the internet!
But only Fedora can't connect anymore, the Windows PC has connection as well as my Mac OS X (I dualboot Linux on my MacBook). The Ethernet connection works as well, when I unplug the cable, Fedora gives me a message, but I just don't get into the internet!
Does anyone have an ides what I have to do? I don't know anything about network connections and I'm new to Linux...
I already restarted the Computer, but that didn't work, and Google didn't really held either.
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Jul 23, 2010
I've installed qmailtoaster on CentOS. I use vqadmin for managing virtual domain. I can list the current domains on vqadmin interface. But when I choose "View Domain", enter a my domain and choose "View Domain", I receive a white page. I can't view the information about my domain. Please help me to resolve the problem. I can create a new domain and view the domain on vqadmin but I can't view the existing domains.
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Apr 18, 2011
After i install it i lost my internet connection . i got a message " Wired Network " " you work offline ". i use cable ADSL ,.... my Pc information HP Pavilion 6700 running with both Window 7 & Ubuntu 10.10 note... my network connection work correctly on W7.
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Mar 5, 2010
Why do I keep getting this error when I try to search something on google. It happens when my query has around five or more words. If a search for just one or two words I don't get the error. I know it's not google because it happens with bing, msn, and yahoo too. The connection was reset The connection to the server was reset while the page was loading.
* The site could be temporarily unavailable or too busy. Try again in a few moments.
* If you are unable to load any pages, check your computer's network connection.
* If your computer or network is protected by a firewall or proxy, make surethat Firefox is permitted to access the Web.
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Jan 12, 2010
I have just upgraded to Ubuntu 9.1 and now my mobile broadband connection will not work. The dongle says it is connected to my provider but Firefox is telling me it cannot find the web page. Everything was working perfectly before the upgrade!
Error message: The browser could not find the host server for the provided address.
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Jul 3, 2010
I just downloaded and installed Ubuntu a few days ago (on my Windows Vista Laptop), played around with it, did some trouble shooting (got my wifi card working!)... and am generally enjoying it.However, I am having issues loading my Yahoo Mail. I am using the newest version of Opera (which I also run on windows), but have tried Firefox as well. I am having absolutely no issues with Yahoo mail when I use Windows (in Opera, firefox, chrome, and IE), but can not get it to load at all with Ubuntu. Basically I can get to the Yahoo home page no problem, and can access any of the links etc., except for Mail. When I click it, I just get an error page (as if there was no Internet connection). I have not had problems with any other sites.I'm thinking its some kind of scripting/application conflict, but like I said this whole Linux thing is brand new to me. Have only ever really used Windows in the past.I'm hoping to get these minor issues hashed out, and eventually just drop Windows out of my reality.
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Feb 23, 2010
Somehow I lost Internet connection and tried various threads and still does not work.
When used the liveCD I can access Internet
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Jun 12, 2011
I'm running 10.10 and I uninstalled some files through synaptic and it also removed a lot of other packages which messed up my whole system. I lost the connection to the Internet and also the taskbar. I don't know how to re-install those lost packages because I have no net connection. How can I fix this? This is what I removed:
Completely removed the following packages:
apt-xapian-index
libboost-python-dev
python-xapian
[Code]...
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Nov 30, 2009
Three months ago my daughter went off to college with a new computer. I zapped her old system and successfully installed Ubuntu 9.04 from a CD. Everything worked fine including all the peripherals and the wireless internet connection. I was able to download and update applications without a hitch. Great system and so much cleaner and quicker than Win XP on the old machine. Then the system was shut down and lay idle for three months.When I fired it up a couple of days ago, all seemed normal except I could no longer access the internet even though the wireless network icon showed four or five bars. I first discovered the problem when I tried to update though Update Manager and noticed that 22 identified files could not be fetched. Neither Firefox, Skype nor Goodgle Earth can connect.
The router is a Linksys WRT54G router that connects to the computer through a Linksys WUSB54G USB network adapter. The router serves three other non-Linux computers without a problem, including one using the same model network adapter.I don't have much experience with Ubuntu, but this is some of the information I have been able to generate.
I tried a few of the recommendations found in other sites, but nothing seems to do the job. I am perplexed because everything was great until I shut down the system for three months and then started it up again. I appreciate any assistance and would be happy to provide additional information as requested.
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Sep 11, 2010
My father has configured his network and the computer has connected to the wired network. The problem is firefox says the server cant be found at the given address. The wired router says its connected to the network and yet firefox doesn't see the router admin page or network.
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Oct 9, 2010
I'm running lucid 10.04 on my netbook (regular desktop distro though). I enabled the proprietary drivers needed to get wireless working (I have an hp mini 110 by the way), but the applet in the taskbar will never show a connection, even if it is connected.
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May 20, 2011
I played with the Network Settings section in YaST, because I wanted to use the wireless network card I installed into the PCI port. OpenSUSE recognised the type of card and its MAC number, and told me that I needed to install a firmware (fwcutter something). I tried some changes on the cable internet connection (like activate on plugged) while I tried to change the wireless connection (like activate on boot).
What I have now is that my cable internet connection is not working at all (it was working just 3 days ago), my wireless internet connection is, as always, not working either. I managed to work the wireless card on Windows XP by finding its drivers.
Since the problem is with my office computer, I cannot answer the exact brand names of the ethernet card and wireless card. Shall I reinstall OpenSUSE 11.3 from the DVD I have?
Second problem: OpenSUSE does not recognise my external harddisk, it gives an error about mounting the device.
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Jan 29, 2011
Using acer aspire one (ZG5) and have lost connection to Firefox browser after changing setting to make google my home default web page. I have no experience with linux so any help would be appreciated. There's no problem with my internet connection it shows connected.
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Aug 13, 2011
I've just installed a fresh copy of 11.4 and the updates are driving me crazy. My internet connection is up, but the download stops and goes, and when I try using firefox, it takes a minute to even start to load any page. I have the system monitor up and it is telling me that the network is not receiving anything except for these bursts of data aprox. every 30 seconds.
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Feb 14, 2011
I installed ubuntu 10 just yesterday. Everything was working just fine. The auto-update function advised me to download and install the latest updates and so I did. It was over 300 MB. I installed it, did a reboot and my internet connection was lost. I tried a few things I found on this forum yesterday. Nothing worked. I can go on-line on the same computer using windows 7. But I always have to reboot to try the different solutions. All right that's fixed! But now I just have to fix Firefox...
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Dec 15, 2010
i have lost internet on acer aspire one when i tried to add firefox 3.6 and cannot solve the problem.....i have tried several times and nothing works, it tells me it either failed or is unknown..... i can't even get back to firefox 2....everything was ok until i added adobe flashplayer and when i rebooted to make it work there was no internet at all and it's my sisters netbook not mine.
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Oct 29, 2010
When I make a vpn connection to an openvpn server, I loose the internet connection.
The VPN works all right.
Server config (extract)
Client config
Client route without the VPN connection
client route with VPN connected (internet lost)
Is there anything I can do to the push rule of the servers's config file?
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Jun 21, 2010
After having updated unconditionally all packages in Kde-desktop-factory-repository to get the latest version 4.4.4, I can no longer connect to the Internet through Knetworkmanager. I receive the the following message from a pop-up window when clicking on the Knetworkmanager icon
Code: KNetworkManager cannot start because the installation is misconfigured.System DBUS policy does not allow it to provide user settings; contact your system administrator or distribution.KNetworkManager will not start automatically in future.I tried opening Knetworkmanager in a terminal as root user through 'su' but received the following message:
Code:# knetworkmanager knetworkmanager(2331): KUniqueApplication: Cannot find the D-Bus session server:"Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken."
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Feb 4, 2011
I have an Acer Aspire One Netbook that has lost connection with the Internet. On clicking the Browser button I get a message saying "Your wired device is now connected" - but nothing happens. It was working fine up till about a week ago. A substituted computer will work OK from the same output from the Router/ Modem through the same cable.
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Jan 9, 2011
I am running Ubuntu 10.10, and I would like to use my computer to share the internet connection from an ethernet port. For example, I would like to set up my computer as a wireless access point so I can create a network that other computers can connect to for internet.
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