Ubuntu Networking :: IPv6 - MTU And Network - Cannot Connect To The Internet
Jan 10, 2010
The installation of Ubuntu 9.10 on my HP NC640 worked fine and the network adaptor was successfully recognised: I see the message 'Wired Network Connection 'Auto Eth0' active' and when I open Active Network Connections I see the IP addresses that have been assigned.
However, if I open Firefox, I cannot connect to the internet. I tried pinging some addresses (www.yahoo.com) and that seemed fine. I then tried to run a first system update and Ubuntu seemed to be able to retrieve some packages but not others.
I then tried opening 'Network Connections' and adjusted the MTU (to 1100) and changing the settings of IPv6 (various settings: eg. 'ignore') but none of that seemed to help. Here I wanted to switch off IPv6 but it looks like none of the settings did this. Is there maybe another place where I should be looking? Do I have to do this with the command line? (I hope not) Or can I switch off IPv6 in the system settings? And should MTU be automatic? Or should I set something there?
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Aug 8, 2011
I can connect to the internet through wifi, but I cannot connect to anything on my network. I have a printer and a NAS, so I would really like for this to work again. I have a dell laptop with a Broadcom card.
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Sep 1, 2011
I cannot connect to the Internet by LAN. The light of the Internet card is off. On Windows, the system says the cable not plugged while I have plugged it. I solved this by change speed and duplex mode. However, on Ubuntu, the changing doesn't work
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Feb 18, 2010
Just purchased a Dell Inspiron 580 MT tower pc with Windows Professional. However unable to connect to the network or the internet when I load a copy of Ubuntu Karmic on dual boot. Windows networking and internet working fine. Is this an ethernet adaptor hardware issue? Broadcom NetXtreme 10/100/1000 Gigabit Ethernet controller-PCI Express card Will try later connecting through a usb ethernet adaptor to see if this is really the problem.
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Mar 12, 2010
I just installed Ubuntu 9.10 64 bit on my HP Touchsmart TX2 1020us which has a Broadcom 4322 chip. At first my computer didn't seem to see the card at all, but then I typed the command (sudo apt-get install bcmwl-kernel-source) and then restarted the computer and now I'm connected to the network, but cannot connect to the internet so how do I figure this out. Like I said I have very little experience with linux at all so please don't make your answers too complicated.
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Oct 16, 2009
2 days ago I did a fresh install of Fedora on my computer to be dual-booted with Linux Mint. The first time I did this install a few weeks ago, I did all of the updates, rebooted (internet still fine) and when I rebooted again, Fedora could no longer connect to the internet (but could still see the networks and ostensibly connect to them). I fixed it then by manually setting the BSSID/IP/DNS/etc.
And this happened again on the new install! This time it took out the internet connection in Mint too. I tried manually setting the connection settings, but that didn't even work for a while. So, last night, thinking that the install might be the problem, I reinstalled Fedora. This morning I finally got my internet to connect on Mint, but I'm concerned that if I do all of the updates on Fedora I'm just going to end up back at square one with zero internet connection.
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May 3, 2010
I Have Ubuntu 9.10 Server installed and for some reason after updating our server with the ubuntu update manager, we can no longer connect to the network via remote desktop, let alone not even able to ping. We are actually able to connect to the internet itself just fine so I dont understand why this isn't working
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Jan 20, 2011
I have had a heck of a time trying to get my laptop running ubuntu to connect to my home network. I have managed to get it to work at my university which would seemingly be more difficult than getting it to work at home, so I know for a fact it isn't a hardware or driver issue. If I try to connect via ethernet cable from my router, it detects that I connected the cable but says "disconnected" and never lets me connect. If I SKIP the router and go from my modem directly to my laptop via ethernet cable it works great.
Using the wireless network tool I can see all of the wireless connections in my area. When I go to connect to my network it prompts me for the WEP key and when I enter it and hit connect it just keeps cycling and eventually times out and finally again prompts me for my WEP key. I know this network works as it works just fine on my Windows 7 partition. Another interesting note - both my wireless and ethernet connections both worked flawlessly and stoopid easily on the live cd but don't after the full install.
If I manually enter in the information for my wireless through IPv4 settings and enter in the Address,Netmask and gateway I can connect to my network - but then I have no active internet connection. Same deal with my wired connection. Is this because choosing this manual method grays out the DHCP?
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May 4, 2010
I cannot connect to wirelessly when I have IPv6 enabled for the wireless network card. It works great on ethernet, but if I enable it for the wireless card then I cannot even get IPv4.
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Sep 25, 2010
I just installed Fedora 13 64bit Gnome, but I can't connect to the internet for some odd reason.
If you look at the image below:
I have marked the network icon, but on my desktop I don't have that icon for some reason...
Since I'm new @ Linux(Picking it up again) I went to the services and checked 2 services:
The network manager service was running but the status said: This service is dead.
And the network service was also running but status was: The status of this service is unknown.
I also went to the Administration menu and checked Network, the first tab showed no devices, but when I went to the hardware tab it did show my card.
I also don't believe that this is hardware problem since the card worked just fine under Fedora 9 or 10(Don't remember).
So if anyone got some solutions for me it would be great...
Some related hardware info:
lsusb
Code:
Code:
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Jan 31, 2011
How to make my fedora 8 be able to connect to the internet by using wireless network ?
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Feb 9, 2010
I have installed WvDial (apparently) but it has no icon or launcher to start it by default, how do i get it to run? I also need basic set up how to. I am running Ubuntu 9.10 (Karmic) and network manager doesn't seem to be able to use my modem to connect to the internet (set up wizard works, appears connected, but then I get page not found error). Hence I wish to use WvDial to try to connect instead.
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Feb 1, 2010
Is karmic is slower for you all: if you're running windows ping a server on windows/ubuntu and compare. 9.10 is consistently slower for me. I've seen enough "slow internet" posts to suspect that someone screwed up bad. Everyone says it's ipv6, but none of the fixes work for me. Pretty sure it's ipv6 (or at least a dns-related problem):
[Code]....
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Jan 23, 2011
I have installed Ubuntu 10.10 on my laptop, and the internet was very slow and kept dropping in and out for any web browsers and sometimes the Ubuntu software center. After searching the internet for a while I came across several article saying to disable ipv6, which I have done, but the issue persists
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Jun 6, 2011
I installed ubuntu yesterday on my desktop. I noticed that the global internet connection is very slow (browsing,downloading from apt-get, etc).
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Jan 4, 2010
have had a problem with my ubuntu system recently in that it will only let me connect to the Internet through Firefox if I switch network.dns.disableIPv6 on. How do I do the equivalent in Ubuntu to enable me to use Ephiphany etc which are not working anymore
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Feb 21, 2011
i have 3 comps(running ubuntu 10.04) and a laptop(running vista sp2). i have installed samba on all ubuntu comps. i have a printer attached to one of the comps and it has been shared also the internet connection on that comp has been shared. all the computers are connected using lan cables through an ethernet switch. i also have a wireless router which is connected to the ethernet switch.
I am able to view all the comps on the network except the laptop running vista. all the desktops are visible on the network and are able to print and share files on the network and also connect to the internet.the laptop running vista can connect to the internet but its not visible on the network and nor can it share files across the network or access the printer.all the systems have a static ip.
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Aug 1, 2010
I have just started using fedora 13 and I am not sure if i am in the right area but here goes...today I was online in my fedora 13 partition on my laptop and I had been online for quite a while then I shut down my machine to recharge the battery then a couple hours later I turned it back on and all of a sudden my network manager applet was missing and I could not connect to the internet, I opened firefox and tried to get to my homepage but it basically just told me that I wasnt connected..
I suspected at first for some strange reason that MAYBE it was my NIC so I booted up into my vista partition and low and behold the internet works fine, so the problem is on the linux side, I have tried every command nm-applet but it just keeps saying an instance of nm-applet is already running, I have no clue how to restore the network manager and get my internet back and the only other piece of information I have is that earlier today I did do a bunch of security updates but the internet was working fine all day even after several reboots through out the day.
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Aug 9, 2010
I have one pc on which I have installed slackware and samba (fixed IP, mask 255.255.255.0) I have another PC (also XP) which also has fixed IP running XP, and I can connect that to the slackware server easily My third PC connects to the internet and gets its IP address from the Cisco router(?) that provides the IP and mask on boot up.
I tried changing the IP and Mask on the slackware server to match the internet PC (which uses a mask 255.255.254.0) but the PC mask and IP changed on the internet PC I want the PC that connects to the internet to also be able to connect to the slackware server, but I see no need for the slackware server to also connect to the internet - I will mainly use it as a file server When I worked for another company I think the IT department talked about having 2 network cards in the PC that connects to the internet
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Sep 18, 2009
I have seen several threads lately about slow internet connections here and elsewhere, but I haven't seen anyone post a reply about blacklisting ipv6 so I am curious as to why?Is ipv6 enabled only on certain distro's or is there some other reason that it's not mentioned?
<If anyone wants to try it, to see if it would work for them>
On Slackware 12.2 and Salix 13.0 just add "blacklist ipv6" to the /etc/modprobe.d/blacklist file. I'm not sure about non-slackware based distro's. Unfortunately, I don't know any way of doing it without rebooting.
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Aug 6, 2010
I know Windows forward and backward but I am so new to linux it's just wrong. I just installed fedora (like 1hr ago) on and old toshiba laptop with a WiFi PC card. Everything seems to work fine except. My Networks connects to my home Wifi network but it will not connect to internet. When it connects the IP address isn't even close to being in the same range as my other laptops and PCs. Like I said I'm new to linux but I'm wanting to learn. Any fixes for this issue? Which linus book is the best one to read for a beginner? Other then not connecting to internet I have no complaints.
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Jan 22, 2010
I'm using ubuntu karmic and I'm not able to connect to the internet with my reliance netconnect data card using network manager. Other distros like fedora, opensuse n sabayon connected easily with nm. Ubuntu detects the data card flawlessly but just doesnt connect.This problem has been persistent even in previous ubuntu versions, n I used to use wvdial. But downloading wvdial on some other comp with every dependency is really cumbersome.
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Aug 26, 2010
I installed 11.3amd64 as a VM under Vista/VMWare Player - all worked fine. I have now installed it as a physical system. It nstalled cleanly BUT during first boot it could not access the repos. With each repo it gave the message
- download (curl) error for (repo)
- error code connection failed
- error message could not resolve host (repo)
This was followed by a message box containing
- UI syntax error
- no widget with ID 'contents
Firefox could not access the internet (cannot find server) until I disabled IPV6 (I used about:config), now it works fine. I think the repos problem is because of IPV6 - I usually have trouble with IPV6. I tried disabling IPV6 with the following (How To Disable ipv6 on SuSE Linux | Linux Poison)
[code]......
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Jul 25, 2010
I'm using Internet connection through local network, receiving white (global) IP, route, DNS with local DHCP server. Lately I noticed that my Ubuntu gets ipv6 autoconfiguration from ISP router, receiving global ipv6 address and automatically adding ipv6 route. I can access Internet resources using ipv6 connection:
I can ping inet resources using my ipv6 global address and access, for example, ipv6.google.com or URL..
How can I share ipv6 connection to my home network? Using ipv4 it's easy, I just can use NAT for this. But if I understand correctly, in ipv6 there isn't such thing as NAT, because there is no limit in ip addresses.
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Jul 22, 2009
I used to play with gw6c ( a client for tunnel broker ) It works well with fedora9 , fedora 10, but not with leonidas. my rpm is gw6c-6.0-0.4.beta4.fc9.i386.rpm ( a little old!) when I tried to install i have got this: libcrypto.so.7 est ncessaire pou w6c-6.0-0.4.beta4.fc9.i386 I try to make a soft link to libcrypto.so.0.9.8k, but nothing; The question :-Is there a solution for that pb - did you know a better client for non native ipv6 connectivity?
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Aug 31, 2011
I have been struggling to get FC15 to act as an IPv6 router for a while now, am sure I am missing something trivial.. The idea is that I have a ppp / adsl connection (this works fine), use the wireless card on my pc with hostapd and dhcpd to provide connections to other pcs (works fine), and radvd to delegate ipv6 addresses.
The issue seem to be that as soon as I turn on ipv6 forwarding (net.ipv6.conf.all.forwarding =1), the ppp connection no longer gets an IPv6 address. This means the router cannot ping any ipv6 address outside my network.
If I disable ipv6 routing, my router gets an IPv6 address on its ppp connection, and can ping things such as ipv6.google.com just fine, however (of course) no packets are forwarded from my network and radvd complains that forwarding is disabled.
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Jul 26, 2010
I addes IPv6 address to my interface as
Code:
ifconfig eth0 inet6 add 3fff:ffff:6:5:4:3:2:1
But, when I restart the network service this IPv6 address is gone. How could I make it as a permanent IPv6 address( that should be edited or deleted when I want but not when I only restart the network)to my interface?
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Apr 12, 2010
I installed Suse 11.2 on clean HD. I cannot connect to the internet. Seems like Suse didn't install drivers for on board ethernet card. It is a Marvell Yukon 88E8056. I'm new to this and don't know how to install the drivers.
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Aug 25, 2011
I am trying to configure my IPv6 network. My computers are behind a Fedora gateway IPv6-configured, which is working great. But for computers inside my network, it seems I am getting only internal addresses from DHCP. Here is my ifconfig for an internal computer:
Quote: em1 Link encap:Ethernet HWaddr F4:6D:04:34:92:2B inet addr:192.168.0.184 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::f66d:4ff:fe34:922b/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:744250 errors:0 dropped:0 overruns:0 frame:0 TX packets:548987 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:841392242 (802.4 MiB) TX ytes:60384500 (57.5 MiB) Interrupt:18 Memory:f7100000-f7120000
he-ipv6 Link encap:IPv6-in-IPv4 inet6 addr: 2001:470:1c:611::3/64 Scope:Global inet6 addr: fe80::cea7:b778/128 Scope:Link UP POINTOPOINT RUNNING NOARP MTU:1480 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:61 dropped:0 overruns:0 carrier:61 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
[Code]....
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May 21, 2011
how to connect my network data card to run internet on openSuse..
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