Ubuntu Networking :: Wired Connection - Can't Connect - Dhcp Enabled Automatically
Jun 20, 2010
Since that time I moved to Archlinux and I love it. I do however run lubuntu live from a USB for my work PC. I am having a problem with it. I think it's okay to post here because the core of the system is still Ubuntu. I don't think LXDE is the problem. I start up the live environment and it says 'wired connection connected' but I can not load any pages or do anything.
I thought it may be a problem with configuration so I copied down (from Windows) the IP, Subnet, Gateway and DNS. I put them in manually and it doesn't say connected any more and still no connection at all. I am unsure what to do from here. I am not really familiar with Ubuntu enough to try much. I tried to 'dhcpcd eth0' but dhcpcd isn't installed. I guess the default Ubuntu network manager has dhcp enabled automatically.
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Sep 30, 2010
I've been reading around, but not had much success at all in trying to share the internet connection from my laptop to my phone.all the articles i read refer to earlier versions of Ubuntu and the packages they mention have become obsolete, according to the apt-get tool.im not that new to Linux, but my networking probably isn't up to scratch.if anyone could help me, that would be great, im using Ubuntu 10.04 at the time of writing.
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Nov 15, 2010
I just installed Fedora 13 on my desktop computer and ran into the same problems I did when I tried to install which was i could connect to a network but couldn't access the internet. I decided to install Fedora 14 since I already installed it on my laptop. I'm still running into the same issue, I can connect to my network but cannot connect to the internet using my PCI NIC or onboard NIC. Networking is enabled and I'm getting a IP address from my router. I ran "lspci" and it shows me both network cards which, please correct me if I'm wrong, makes me think that the drivers are installed.
I'm also curious if the VNC client/server could be used through a WAN. I would like to remote into my computer at home when I'm not there and see the gui. I had SSH installed at one point but it was just text. If there is better program please let me know. why I would have Services on my laptop but not on my desktop? Both computers are running the same version. Both cards are enabled and set to connect automatically. I can get a IP with both NICs. I only have one plugged in at a time.
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Aug 1, 2010
I'm running an up-to-date Fedora 12 machine with the Gnome desktop (meaning with Network Manager). My network connection is a wired ethernet to a switch which then connects to a Netgear router. For some reason, this machine can't renew its leases with DHCP, so NetworkManager deactivates eth0, taking my machine off the network. I have to click Network Manager and enable eth0, which seems to work every time.
How can I fix it? Here are the relevant bits from /var/log/messages showing a failed DHCP request and then the successful renewal.
Code:
Aug 1 04:00:08 ironton dhclient[12452]: DHCPREQUEST on eth0 to 192.168.1.1 port 67
Aug 1 04:00:08 ironton dhclient[12452]: DHCPNAK from 192.168.1.1
Aug 1 04:00:08 ironton NetworkManager[1261]: <info> (eth0): DHCPv4 state changed reboot -> expire
Aug 1 04:00:08 ironton NetworkManager[1261]: <info> (eth0): device state change: 8 -> 9 (reason 6)
Aug 1 04:00:08 ironton NetworkManager[1261]: <info> Marking connection 'System eth0' invalid because IP configuration expired.
[Code]...
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Jun 11, 2010
I just upgraded to Fedora 13 (from 10, using preupgrade), and I've gotten most things working again, but I'm still having trouble with the network.My wired connection (eth0) doesn't connect on boot (even though ONBOOT=yes in /usr/sysconfig/network-scripts/ifcfg-eth0).Because of that, I figured I'd just leave eth0 connected manually (with ifup eth0). However, I then found that if I try to connect to a VPN like this, the system reverts to the "stalling every time I try to connect to the internet" problem that I had earlier.
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Sep 1, 2010
The situation is I have one machine just installed 10.04yesterday, and I plan to take it as FTP server sharing filesvia LAN and WAN as wellBut after setting up all network withNetwork-Manager found that my dsl connection willdisconnect while my wired connection was connected.
my network-manager setting process is:
1.wired tab:
IPv4:192.168.1.x
[code]....
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Apr 20, 2011
i can't connect to the wired connection, but i can connect to the wireless... i'm using Ubuntus 10.04. when i run this codes into the terminal it shows:
root@valdivia-laptop:/home/valdivia# sudo lshw -C network
*-network
description: Wireless interface
product: AR9285 Wireless Network Adapter (PCI-Express)
vendor: Atheros Communications Inc.
physical id: 0
bus info: pci@0000:04:00.0
logical name: wlan0
[Code].....
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Feb 14, 2011
connect to my wired connection using the terminal?i screwed myself over and dont have a desktop menu bar,and i need to connectto the internet so i can get it back.
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Mar 19, 2011
Using 10.10 and have a wired connection that according to the system is connected, but when I open a browser I can't connect to any sites. What am I missing here? I can't for the life of me figure this out.
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Jun 24, 2011
I have installed Ubuntu for the first time (version 11.04), finally making the step to open source software. Everything seems to be working fine, however I can't connect to my router via a wired connection.I can use the wireless network,hich was detected and I could connect by giving the code. But when I try to connect to this network by wired network, it tries to connect and it says "connection offline" after a while. It never establishes a connection. I used the standard automatic DHCP settings of eth0. I never got this problem with another OS and it's not the cable that's not working
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Mar 3, 2010
I have just installed a fresh copy of 9.10 on an older Compaq nc6000 laptop. I need some help getting my Linksys WUSB600N wireless adapter to function properly.
I have "half-way" connectivity, meaning that I can see (and connect to) my home wireless network but I can't connect to the internet (unless I use the wired connection). I have installed NDIS wrapper - no change
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Oct 27, 2010
I want my netbook to connect automatically to both the office wired/static network and to the usual wired/DHCP networks.
wicd is wicked but netsearching hasn't revealed how to configure it for both wired/static and wired/DHCP except by manually switching profiles.
wicd's profiles can use pre/post(dis)connect scripts but I don't know how to integrate them into wicd when they are upping/downing connections on cable (un)plugging.
If it is not practical to solve this within wicd, I'll explore standalone scripts to configure eth0 on cable (un)plugging, as detected by ifplugd.
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Jan 11, 2010
I recently installed Ubuntu 9.10 on my Dell Inspiron 1545 64-bit laptop. Before that I used Windows7. In Windows, the internet connection worked perfectly well. But after installing Ubuntu, I am unable to connect to the internet. The network-manager applet finally says that "You are disconnected". When I do the "ifconfig", I got no IP address.
So, I installed Ubuntu 9.04 in the same system. But the problem persists.
I gone through many posts in this forum but nothing was useful.
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Jul 3, 2011
newly installed fedora 15 is not able to connect to internet i have broadband connection with wireless modem my laptop is connecting to wireless modem network. but i am not able to configure pppoe connection on it PS: i am able to connect to internet when using wired connection from modem
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Jun 13, 2010
how to make dsl setup and to acess both wireless and wired at a time.
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Dec 5, 2010
I have just installed ubuntu 10.04 using the wubi installer to dual-boot my machine. Under ubuntu, I am not able to connect to the internet or my router. Everything works fine under windows. I have tried to find relevant information in the forums, but nothing seems to work for me. I have tried disabling ipv6, setting a static ip, but no go. ifconfig shows no IP, dhclient results in no DHCP offers and pinging my router's IP results in Network is Unreachable.
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Dec 10, 2010
My laptop has been working fine with ubuntu 10.04, and earlier today it shut down after running out of battery. I came to use itr and discovered that the wifi icon had disappeared from the panel bar, and it won't connect to the wireless networkor via a wired connection.I have had a play around with this, tried ping -c5 google.comresult was:ping: unknown host google.comand ping -c5 4.2.2.1result: onnect:etwork is unreachable.I have other computers connecting to this network and know that it is working fine.
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Jan 11, 2010
I have been trying to connect to the internet with a wired LAN connection for a while now with no luck. Running version 8.04 LTS on a 32-bit desktop. Interestingly, my 64-bit desktop running version 8.04 64-bit automatically connected to the internet with no problems or input from me. Both are connected to the same router.
I figured i'd try and copy the network manager settings from the 64-bit machine to the 32-bit machine, which involved setting an automatic configuration (DHCP}. All went well except no DNS server address showed up on the 32-bit system, despite there being one on the 64-bit system. Trying to run Firefox like this results in the 'page load error' page coming up immediately.
I then manually added the DNS server address from the 64-bit system to the 32-bit system, and all that did was prolong the time it takes for the 'page load error' page to appear.
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Feb 11, 2010
I just installed ubuntu 8.10 on my pc. Before was XP installed. I formatted the system and installed ubuntu. Installation was successful. Problem is that I cant connect to network. My network card: realtek 8139 ethernet card
On ifconfig I get:
Code:
eth0 Link encap:Ethernet HWaddr 00:16:76:af:23:b3
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:23 Base address:0xb800
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:502 errors:0 dropped:0 overruns:0 frame:0
TX packets:502 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:31896 (31.8 KB) TX bytes:31896 (31.8 KB)
Also the connection is wired one with modem only it's reliance broadband. The wire is connected between modem and pc but there is no blinking of light for this connection. The wan is active and wan's light is blinking and when I was on xp on same pc there was no such problem.
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Aug 26, 2010
I am unable to connect to the Internet using a wired connection. I was able to use the wired network yesterday. But I had problems with the flash player, so had to reinstall Ubuntu again. I am able to connect to Internet using wireless connection. But I need to connect to the wired connection. I am using Ubuntu 10. In my IPv4 settings, it is automatically set to DHCP, using which, I was earlier able to connect. But now it doesn't seem to be happening.
But there are other entries on the syslog that were recent.
Output of dhclient
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Mar 10, 2011
I have just setup Ubuntu on my Dell Laptop a Lattitude C640 with a 3Com 3c905C Tornado Wifi Card. Well the wired and wireless do not work. They try to connect then bang no connection. I would be able to make some headway I think but I have no basic skills with Ubuntu. I have mastered how to get info from the terminal but how the heck to you edit a file? How do you get to that stage?
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Jul 14, 2011
I've just installed 11.04 Natty on an old Laptop (Dell Lattitude C400) and am unable to connect to my home network (wired LAN connection, no wireless). The laptop previously had WinXP installed and was able to connect (I have also double checked the cables and ports and they're all functioning ok).
sudo lshw -C network
Code:
*-network
description: Ethernet interface
product: 3c905C-TX/TX-M [Tornado]
vendor: 3Com Corporation
[code]...
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Jun 5, 2010
I have a Zotac Ionitx A-U. I can't get it to establish an internet connection with the wired ethernet within Ubuntu. The chip is detected, but trying to bring up the connection stalls out at trying to obtain a DHCP lease, like this:
DHCP DISCOVER ...
DHCP DISCOVER ...
No DHCPOFFERS received
Specs:
Ionitx A-U
Ubuntu 10.04 x64 kernel 2.6.32-22 (also didn't work in 9.10)
[Code]...
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May 19, 2010
everything works good in windows environment. still in ubuntu 9.1 which i am using , cannot access internet using connection manager
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Apr 16, 2011
I recently did some troubleshooting on a USB wireless dongle hooked up to my Mint distro. I need the USB wireless to access a home DSL wireless modem out to the Internet. The wireless DSL is on 192.168.0.1
I also have a 10/100 ethernet NIC in the computer, for non-wireless connections. The wired ethernet is all 192.168.1.1. I noticed in /var/log/syslog that there are numerous "DHCPDISCOVER on eth0 to 255.255.255.255 port 67" messages.
Since eth0 has a hard-coded IP, I dunno why DHCP is trying deal with it. Can I turn off DHCP activity against eth0? How to do that?
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Nov 2, 2010
I am unable to connect to wireless network in ubuntu 10.10.i have noticed that the iwlagn driver isnt been used by anything.
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Jan 10, 2011
in linux world and have recently downloaded and installed ubuntu desktop 10.10i cannot connect to both wired and wireless ethernet on my laptopit tries to connect but fails in 30 seconds , it says"disconnected" while i am able to connect to the same in windows i have broadcom 4315 and i have tried both fwcutter and ndiswrapper but the problem persiststhe device id is 14e4:4315
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Feb 16, 2011
I'm having mysterious wired network problem with my Karmic/9.10 machine. It hasn't been in network a while, but now I finally got the cabling done. I can't get the IP from dhcp server (TW-EA510), and static settings doesn't work either. Fresh cabling showed OK 1Gb connection on tester, and win7 laptop works fine. I even tried with long cable though the rooms, but it doesn't help, so it definately isn't the new cabling.
Log from the router after issuing #"dhclient":
Feb 16 23:01:43 DHCP SERVER: DHCPDISCOVER from 00:01:29:fb:c5:d1 via br0
Feb 16 23:01:43 DHCP SERVER: DHCP offer to 00:01:29:fb:c5:d1
Feb 16 23:01:49 DHCP SERVER: DHCP request from 00:1b:ea:c8:a0:ba
Feb 16 23:01:49 DHCP SERVER: DHCP ack to 00:1b:ea:c8:a0:ba
Feb 16 23:01:54 DHCP SERVER: DHCPDISCOVER from 00:01:29:fb:c5:d1 via br0
Feb 16 23:01:54 DHCP SERVER: DHCP offer to 00:01:29:fb:c5:d1
Feb 16 23:02:03 DHCP SERVER: DHCPDISCOVER from 00:01:29:fb:c5:d1 via br0
[Code]....
Motherboard is some old Lanparty with two ethernet ports, NVidia CK804 and Marvell 88E800 rev 13 Gigabit netwok adapters, neither of them works. At least another of them has been worked earlier when I last got it wired. It's been a while, so I'm not sure which one of them and with different router if that matters.
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May 25, 2011
I have this in my /etc/networking/interfaces file:
auto lo
iface lo inet loopback
iface eth0 inet dhcp
pre-up iptables-restore < /etc/iptables.rules
post-down iptables-restore < /etc/iptables.rules
but eth0 doesn't automatically come up. I have to do a "ifconfig eth0 up" and then do a dhclient eth0 in order to get an IP after each reboot.
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Jul 6, 2010
When I enable my ufw it completely shuts me out and I have no internet connection. When I do:
Code:
sudo ufw status numbered
I get:
Status: active
To Action From
-- ------ ----
[ 1] 80 ALLOW IN Anywhere
[ 2] 80 ALLOW OUT Anywhere (out)
But I need to disable my ufw in order to reconnect back to the internet. Why is that? Doesn't the above rules indicate that I should have inbound and outbound traffic even if my firewall is up?
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