Ubuntu Networking :: Internet Doesn't Work When Eth0 Is Active
Mar 13, 2011
I am running the latest ubuntu and I am having trouble getting networking sorted. I have 2 networks, one wired (eth0) and one wireless (wlan0). I connect to the internet using wireless. The problem is that I can only successfully connect to the internet if I disconnect from eth0. I have hit this problem with Windows machines and the solution was to adjust the "interface metric" in "Advanced TCP/IP Settings" so that the wireless was the preferred connection. How can I achieve something similar in Ubuntu?
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Apr 30, 2011
my internet was fine.. until.. i had to work in the school so.. a teacher configured the internet settings.. for something .. ( i don't remember) and everything was fine. but when i returned to my house and conected my lap to internet (cable) the internet didn't work.
ubuntu@VR:/etc/network$ ifconfig
eth0 Link encap:Ethernet direcci�nHW 00:1d:72:46:38:3c
Direc. inet:192.168.1.65 Difus.:192.168.1.255 M�sc:255.255.255.0
Direcci�n inet6: fe80::21d:72ff:fe46:383c/64 Alcance:Enlace
[Code].....
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Jul 16, 2010
i was using ubuntu 9.10 till recently when i decided to upgrade to ubuntu lucid 10.04. turns out the internet icon shows connected after fresh installation but when i try to use firefox , after an long wait it shows server not found. i did a research of my own and found that i am not able to ping even my router.using sudo dhclient eth0 doesn't recieve offers , but surprisingly when i tried dhclient eth0 in root shell with networking internet got configured very quickly and i can ping the router and any website.i forgot to mention i have a wired connection which i am trying to connect and the net is working fine with windows 7 on the same PC.
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Jul 2, 2010
My machine has Ubuntu 10.4, installed a week ago. I'm connecting to the Internet with a Wireless 3G modem, the interface is named ppp0. Additionally, I have a network card that is connected to a home router, that's eth0. Everything works fine with eth0 disabled, all my apps can access the internet correctly. But, my issue is that when i enable eth0, i can't access the internet with any app.
So why do i need eth0 anyway? The thing is that i must share my internet connection with my sister, who is also connected to our home router. I planned to give her access by installing squid on this machine and configuring her browser to connect to squid. However, since none of my apps can connect to the internet while eth0 is active (whereas squid and all other apps work fine with eth0 disabled) I can't let her connect to squid while squid is working correctly.BTW selecting "use this connection only for resources on its network" under "routes..." of the ipv4 tab of "Auto Ethernet" made it a little better. Firefox and Xchat started to work with eth0 active. Squid still doesn't work though (althought it works just fine with eth0 disabled)
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Jan 26, 2011
I have installed the Squeeze testing version. i have setup networking for static in the /etc/network/interfaces file. tried to find resolv.conf in the /etc/ since could not find i created this file post trying to start the eth1 i am able to ping my ip, but if try to ping the gateway i get an error saying the ping is not sucessfull. I have 2 network cards, eth0 and eth1. as eth0 does not work i have configured eth1. The dump of the interfaces file is below
[code]...
The same setup works fine in Ubuntu 10.10 setup that i have.
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Apr 14, 2011
Problem: Can't get bridging to work properly.
I'll start by saying that most of this is built inside of a 64bit ESXi 4.1.0 server. Should be obvious by the picture below.
Trying to set up a bridged CentOS box. Ultimate goal is to set up a Transparent Firewall. The machine labeled 'Desktop' is a Windows XP running DHCP. It gets assigned an Internet routeble IP address. At this point, nothing is running a firewall.
Symptoms:
Gateway can ping CentOS bridge
CentOS bridge can ping gateway
CentOS bridge can resolve DNS names and ping FQDNs on the Internet.
CentOS bridge CAN NOT ping Desktop
[Code]....
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Mar 12, 2009
I cannot get static addresses to work on eth0 and eth1. eth0 seems to use DHCP while eth1 uses the static information. Sometimes the static info is used but the interfaces get the addresses reversed.
From /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=mosaic
[code]....
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Jul 16, 2011
I am trying to sort out some issues following an upgrade from F12.
I have eth0 as the connection I want to use. Prior to the upgrade, this connection was enabled and active at boot.
Now, for some reason after the upgrade it has to be manually enabled at every boot - even though when I go the Network tool, Ethernet Device > General tab - "Activate device when computer starts" is checked.
At every boot time it is inactive.
In all the ifcft-eth0 files, the ONBOOT parameter is set to "yes".
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Mar 13, 2010
Hello.
I've openSUSE 11.2, 64-bit version, with GNOME desktop.
My hardware is a Conceptronic c150ru.
Well, I configured it with Ndiswrapper (http://en.opensuse.org/Ndiswrapper_howto), and I hadn't problems.
Then, I tried to enable Internet with the terminal. Firstly, I wrote iwconfig wlan0 mode managed. Well.
Secondly, I wrote iwconfig wlan0 essid (my essid). Well.
Then, I wrote iwconfig wlan0 key (my key wep). An error message appears. How can I write my key wep?
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Jun 7, 2010
I have a question regarding the configuration of Network Connection. My wired connection is fine right now and when I check the network connection applet, it display active information of eth0. However, when I click the Configure button, the Network Connection window appears but there's nothing in the Wired panel. Should there be a eth0 in that panel? I remember I had one before, but after I messed with some configuration of VPN, my network became unstable and I remove the Network Manager to try to solve the problem. Since then, there's nothing in my Network Connection window, though I can still connect to my router with eth0. Now even after I reinstalled the Network Manager, I still don't get anything.
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Jan 4, 2010
I just upgraded from 9.04 to 9.10. When I restarted, I admired the new login menu, then went to Firefox. I noticed that my wireless didn't work (it did in 9.04) Thinking I'd just need to reinstall the drivers, I plugged in the computer to a working Ethernet outlet with a working cord. I noticed that Ubuntu didn't tell me that Auto eth0 was connected. It didn't tell me anything. And then I went to Google and realized that the wired connection didn't work either. Then I came here on an iPod Touch and you know the rest.
Edit: And other devices work too on the network.
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Jan 10, 2010
I really want to convert over to ubuntu and use ubuntu netbook remix on my new netbook but I've had a hell of a time trying to get it to access the internet, I've tried installing drivers but I don't really know how.
My Netbook Details:
MSI U130
1.66 Intel Atom N450
1GB DDR2 Ram
Windows 7 Starter
802.11 bgn 1r1t Mini Card Wireless Adapter
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Mar 10, 2010
I have a desktop pc with xubuntu 9.10 32bit installed. I don't have direct access to this machine, but they told me that internet is not working (firefox, synaptic,etc...), but only skype works! If they reboot on windows, everything works well, so it's not a matter of connection or dns.It's very important because they work with that computer. How can i solve the problem? and what could be the cause of this strange anomaly
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Feb 6, 2011
I have a WUSB54GC v.1 wireless USB adapter which I use to connect to my home network. For some reason, over time my reception has been getting worse. I'm not sure if this is due to the router or the adapter. In addition, when the signal strength dips below 50%, I can no longer receive email or browse the web. This is only a problem with Ubuntu - when I had WinXP installed, I could access the internet mostly regardless of the signal strength.
I started a year ago with the adapter plugged directly into the computer. After a while I found it necessary to use an extension cord to place the adapter outside my room, closer to the router. A while later it was time for another extension cord, and now my reception has gotten worse again, but I can't extend it any further.
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Nov 1, 2010
I'm runnig f 13 on my laptop, and it runs like a charm. But once in a while, the internet doesn't seem to work properly. It mostly works, but right now i am unable to reach certain pages such at google (which is annoying), whereas other pages like yahoo and this one works perfectly well.
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Aug 1, 2010
got a suspend problem with OpenSuse 11.3. I configured the powersave module that whenever I close down the screen of my laptop it suspends to ram. Works fine so far except when the screensaver is active. It just stays on when I close down the lid.
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May 10, 2011
I have updated my Ubuntu installation to natty narwhale and after a reboot the desktop started to look like the attachment Screenshot.jpgThe error does not appear when I choose ubuntu classic instead the windows miss the top bar where the X (close button) is placed.Alt+Tab does not work, and suddenly I cannot write in the active program.
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Aug 1, 2011
I recently installed Fedora 15 x86_64 on my new AMD Machine and I'm quite pleased with things thus far.Here's where my problem comes. I mainly bought that machine to help me with Development. More specifically, Virtual Machines for testing purposes. I have installed Fedora 15 x86_64 as a qemu-kvm Virtual Machine and it's working.. for the most part. I am having a whole lot of trouble getting it to connect to the Internet.
My guess is the only way I'm going to reliably do that is to setup a Bridge. Yes/no? However, in order to setup a Bridge I need to disable NetworkManager and that where the fun happens. It completely disables my network connection. I'm probably missing something small, but I can't figure out what I'm missing. I've double checked my ifcfg-em1 multiple times(I've been trying for ~24 hours so far) and all the settings are as they should be.
I've turned NetworkManager off and stopped it(chkconfig and service) and turned network on(chkconfig and service). Theoretically I should simply need to turn off NM and turn on network and things should be fine. no?
Well, aside from adding:
ONBOOT=yes
NM_CONTROLED=no
to ifcfg-em1.
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Jul 17, 2009
I am a convert from Ubuntu (9.04 kept freezing on my laptop; when it did work, many packages it seemed were outdated--ie only Eclipse 3.2, rdesktop was messed up [and apparently is also in Fedora]), and I am having some trouble with getting my wireless working.I am running Fedora 11.First off, there is a problem when trying to connect when using DHCP. NetworkManager gets to the second green dot, and then after a short while I am given a message that the connection was disconnected.
Configuring the interface manually, not using DHCP, allows the connection to complete. However, the internet is very slow. There is a 15-30 sec delay before website loading actually commences, and then another delay each time an ad must be fetched from another server.How can I fix this delay? I know I have encountered it in earlier versions of Ubuntu, but I can't remember how I fixed it.About the rdesktop problem, if anyone is able to help [maybe I should post another thread?], the cursor color (the color of the pointer) is inverted---where it should be white it is black, and where it should be black it is white. I use rdesktop a lot to connect to my terminal server in my basement. Any idea how to fix it?
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May 5, 2010
My network name is eth2 it was changed by some reason and now i got these errors... i installed, reinstalled, re re installed, tried to run the asistant but no luck :/
Code:
* Stopping the Firestarter firewall...
eth0: error fetching interface information: Device not found
eth0: error fetching interface information: Device not found
eth0: error fetching interface information: Device not found
[code]....
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Aug 15, 2010
So, is it possible to set mobile internet as eth0? the reason for this is that etherape and wireshark wont recognize/work with my mobile internet.
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Apr 18, 2010
This holds true in Transmission and NOT in Vuze. UPnP is enabled, ports are randomized and open each time. Pings to outside still work fine, but I cannot browse to websites (404 errors) when the app is running. I'm stumped, is Transmission locking all other in bound traffic/ports except the one it wants to use?
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Oct 15, 2010
I have two connections for my PC, my Ethernet which is on the corporate network and my smart phone on 'usb0'. Both have full internet access.I want to stop my PC from connecting to the internet over the Eth0 while still connecting to internal servers then just have internet over usb0.If I go to the settings of 'Auth Ethernet' in the tray area, under IPv4 there is the routings section - I've tried enabling "use this connection only for resources on its network" but it doesnt work.
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May 11, 2011
im a linux noob dont get techy ill die of brain fry im running a craft bukkit minecraft server on my 11.04 ubuntu server. however the server uses my only 10m Ethernet cable that i normaly use for my ps3 (i will NOT go wireless. i hate it (or dont like it)) therefor i found an old PCI NIC in an old computer, its a 10/100 realtek one. ifconfig detects it (after two commands:
Code:
ifconfig eth0 up
dhclient eth0
)
now i need to send the internet to my ps3 too.i know the connection wont be blazing fast but isnt it okay?it musnt interrupt the minecraft server. if you need info just ask. ill try and provide them.
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Jan 18, 2010
I've installed Eagle Server in a Cisco lab but R1-ISP router can not see the server because of eth0 is inactive.I'm new in Linux OS.So, how can I make eth0 to be active?
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Nov 8, 2010
A couple of days ago I Obtained a spare computer and installed fedora 14 on it, just to try it out. I only have experience with microsoft windows so I'm new to this system. The OS seems to work fine but I can't browse the internet with firefox. I'm using a speedtouch 546 v6 modem with adsl(wired). The network manager indicates that the wired connection "auto eth1" is active. The previous OS was windows xp. I was able to browse the internet whit this OS. I removed it because it was crashing all the time (illegal version).
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May 24, 2011
I am having broadband connection, I need to connect broadband internet through eth0. Please give me some use full information for configuring this.
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Jan 23, 2010
i want to share the internet connection from Laptop to PC via LAN crossover cable
here's how i connect to the internet in laptop, and connected PC via LAN:
i need to share pppoe(ppp0) to (eth0) , that is what i've been doing in Windows before, but i dont know how to share in Linux, i tried to follow Ubuntu Help about ICS, but it doesn't work
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Dec 1, 2010
I've got access to my LAN and the Internet via my wired ethernet connection. I'd like to share that access with my iPod Touch (device shouldn't really matter) via an Ad-hoc wi-fi network.
This tutorial in the docs seems to describe the right setup but is very out of date (7.04). Instead I found this tutorial and followed it to create the Ad-hoc wireless network. I was able to connect my touch to the resulting ad-hoc network without a problem, but I didn't have LAN/Internet access.What's the next step to get the clients on the ad-hoc network out to the Internet?I found this page in the docs that says I'd need to install dnsmasq-base and uninstalling dnsmasq. I checked and dnsmasq-base is already installed but dnsmasq is not. I do have dnsmasq in /usr/sbin but the package description makes it sound like this should come with dnsmasq. Is the page out of date? Will uninstalling dnsmasq cause other problems?
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Oct 24, 2009
When I activate eth0, the system says that the eth0 seems not exist. However, I can surf in the internet.
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