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Thread: No Internet after install of 11.4 Network connections fine

  1. #1

    Default No Internet after install of 11.4 Network connections fine

    I have no Internet Access with Firefox

    I first tried an upgrade from 11.3 to 11.4 and lost Internet Access, so i re-loaded 11.4 from scratch on clean partitions.
    I am connected to my wireless WPA2/PSK connection, have an IP, am able to see the network.
    I turned off and disabled the SUSE firewall
    I tried setting Firefox proxy settings to auto and to none, i dont use proxy.
    I am currently posting this through an SSH connection to my 11.1 server from the new install of 11.4 on a Dell latitude D600 laptop (not using the on-board Broadcomm that is an issue for a later date).
    I am running out of ideas anyone got a clue.

  2. #2

    Default Re: No Internet after install of 11.4 Network connections fine

    -----BEGIN PGP SIGNED MESSAGE-----
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    Post the output of the following commands from your 11.1 and 11.4 systems
    (and mark which one is which):

    ip addr
    ip route
    ip -s link
    grep '^[^#]' /etc/resolv.conf #get uncommented lines from /etc/resolv.conf

    My guess is that you are missing a default route, or perhaps a DNS server
    that works, but so far there isn't much more to go on. These commands
    should give some good information; the firewall should be left on and that
    is almost certainly irrelevant to your symptom.

    Good luck.




    On 03/12/2011 10:36 AM, mannycaz21 wrote:
    >
    > I have no Internet Access with Firefox
    >
    > I first tried an upgrade from 11.3 to 11.4 and lost Internet Access, so
    > i re-loaded 11.4 from scratch on clean partitions.
    > I am connected to my wireless WPA2/PSK connection, have an IP, am able
    > to see the network.
    > I turned off and disabled the SUSE firewall
    > I tried setting Firefox proxy settings to auto and to none, i dont use
    > proxy.
    > I am currently posting this through an SSH connection to my 11.1 server
    > from the new install of 11.4 on a Dell latitude D600 laptop (not using
    > the on-board Broadcomm that is an issue for a later date).
    > I am running out of ideas anyone got a clue.
    >
    >

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  3. #3
    Join Date
    Jun 2008
    Location
    Earth - Denmark
    Posts
    10,730

    Default Re: No Internet after install of 11.4 Network connections fine

    On 03/12/2011 07:48 PM, ab wrote:
    >
    > grep '^[^#]' /etc/resolv.conf #get uncommented lines from /etc/resolv.conf
    >


    ok! i like that one a LOT...it is going into my bag of tricks....do i
    need to give a creator note to you each time i use it?

    --
    DenverD
    CAVEAT: http://is.gd/bpoMD
    [NNTP posted w/openSUSE 11.3, KDE4.5.5, Thunderbird3.1.8, nVidia
    173.14.28 3D, Athlon 64 3000+]
    "It is far easier to read, understand and follow the instructions than
    to undo the problems caused by not." DD 23 Jan 11

  4. #4

    Default Re: No Internet after install of 11.4 Network connections fine

    I am having a very similar problem, and I am inclined to think is exact same problem.

    My internet connection fails to navigate through firefox. It seems to be a DNS problem, but
    $ cat /etc/resolv.conf
    appears to be correctly set up to openDNS nameservers.
    $ ping google.com #and
    $ ping localhost
    all work normally, and packets start transmitting right away

    I also have an IP assigned. In addition
    # route -n
    also shows a gateway properly assigned for eth0.
    My natural conclusion is that I have internet ready to go. BUT

    "$ wget http://www.google.com"
    is unable to resolve (?)
    and consequently, anything else but ping, is unable to resolve addresses. That includes firefox, and also includes inability to connect to repositories to install my broadcom drivers.

    I am stuck and very bewilder as well.

    (PS: openSUSE 11.3 had internet with my settings working just fine!)

  5. #5

    Default Re: No Internet after install of 11.4 Network connections fine

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    DenverD: I appreciate the compliment, but I'm pretty sure that, though I
    tested and came up with this syntax just now, the idea was stolen from
    somebody else doing the same thing. Yeah, it's a neat trick... thanks to
    whomever originally came up with it. Hopefully the Patent and Trademark
    Office isn't clueless enough to give me a patent on it but then again.... ;-)

    iahern, this is a good bit of information. A ping test confirms the IP
    layer is working, and since you used a DNS name that implies everything
    for DNS is working. My next recommendation is twofold: first, disable
    IPv6 from within Yast:

    sudo /sbin/yast lan

    Reboot (you must I believe) to apply this setting as it's a kernel-level
    setting. See if that helps. We've had threads in the past that cover
    this and I have yet to fully understand it. Other workarounds for
    specific applications (Firefox included) involve disabling
    DNSv6-resolution which you can do and that may be a good test to avoid
    rebooting in the short term (though it's application-specific so in the
    long-term disabling IPv6, unless it actually works on your network through
    to the Internet, is likely better). In Firefox use about:config and look
    for 'dns' (the 'filter' field is great for this type of thing) and set
    net.dns.disableIPv6 to true (not the default) and test Firefox again. If
    it helps then that's definitely the issue and disabling it system-wide
    will probably help everything else like wget.

    Good luck.




    On 03/12/2011 01:36 PM, iahern wrote:
    >
    > I am having a very similar problem, and I am inclined to think is exact
    > same problem.
    >
    > My internet connection fails to navigate through firefox. It seems to
    > be a DNS problem, but
    > $ cat /etc/resolv.conf
    > appears to be correctly set up to openDNS nameservers.
    > $ ping google.com #and
    > $ ping localhost
    > all work normally, and packets start transmitting right away
    >
    > I also have an IP assigned. In addition
    > # route -n
    > also shows a gateway properly assigned for eth0.
    > My natural conclusion is that I have internet ready to go. BUT
    >
    > "$ wget http://www.google.com"
    > is unable to resolve (?)
    > and consequently, anything else but ping, is unable to resolve
    > addresses. That includes firefox, and also includes inability to connect
    > to repositories to install my broadcom drivers.
    >
    > I am stuck and very bewilder as well.
    >
    > (PS: openSUSE 11.3 had internet with my settings working just fine!)
    >
    >

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  6. #6

    Default Re: No Internet after install of 11.4 Network connections fine

    Hi ab. Thanks for your reply!

    Quite amazingly, setting the dns.ipv6 disabled got my firefox going, and now I can post from my shining 11.4

    ping still works, naturally.

    Nonetheless, I found very intriguing that I have (and had had) unchecked the "enable IPv6" case in Yast Network settings. I assume that is how it is system wide disabled, and I had rebooted. Yet, just to give some examples, wget, thunderbird, or yast seems still unable to resolve (to install software). I assume I do not have a clear idea of where to disable IPv6 systemwide in a proper manner.

  7. #7

    Default Re: No Internet after install of 11.4 Network connections fine

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    My wires were crossed it seems... I've seen this before as well but far
    less often. If you are able to test your machine on another network in
    its current state that would be interesting.

    Why does it do this? There a couple nuances that you'll likely see in
    your LAN trace causing this and I'm afraid I do not yet fully understand
    the "why" behind it. Your system likely does not have anything bound as
    far as IPv6 is concerned (the `ip addr` command output requested
    previously would confirm that). IP happens at the third layer of the OSI
    model and within that you have things like TCP (handles getting data to
    the right port on a given system) and a another layer (seven) you have
    things like DNS. Because of this layered model there is a lot of flexibility.

    Anyway, it's possible (and not even uncommon) to have DNSv6 requests
    (AAAA) within IPv4 packets. Normally one may think that DNSv6 requests
    would only be within IPv6 packets but that is just not the case because of
    the layers in the model. What I have seen in rare cases (one network out
    of dozens, but reproducible there) is that the DNSv6 responses for a site
    will come back first (faster than the DNSv4 (A) request's responses) and
    then what I THINK happens is that the application gets confused because it
    can't get to the IPv6 address at all. I also seem to recall seeing where
    the responses came back empty and that would throw off the application.
    It seems that some applications do not rule out DNSv6 requests and in some
    environments that wreaks havoc. Again, I don't completely understand it,
    but I've seen it and worked around it like you did. What's interesting is
    that some applications work while others do not so I suspect that some
    applications may go through a system service or use a system setting
    (somehow... no idea) for things like DNS resolution (I believe nscd is
    involved in this on Linux) while others do not. In my testing when I saw
    this one another browser didn't work, and another did. I don't remember
    which did and didn't but I was testing w/Opera and Chrome. Anyway,
    interesting.

    Good luck.





    On 03/12/2011 03:36 PM, iahern wrote:
    >
    > Hi ab. Thanks for your reply!
    >
    > Quite amazingly, setting the dns.ipv6 disabled got my firefox going,
    > and now I can post from my shining 11.4
    >
    > ping still works, naturally.
    >
    > Nonetheless, I found very intriguing that I have (and had had)
    > unchecked the "enable IPv6" case in Yast Network settings. I assume that
    > is how it is system wide disabled, and I had rebooted. Yet, just to give
    > some examples, wget, thunderbird, or yast seems still unable to resolve
    > (to install software). I assume I do not have a clear idea of where to
    > disable IPv6 systemwide in a proper manner.
    >
    >

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  8. #8

    Default Re: No Internet after install of 11.4 Network connections fine

    ab
    right on target.
    besides the difference that 11.1 was hardwired and 11.4 was wireless all the responces were identical except that 11.4 is not accepting the default gateway from dhcp
    I can post them if you want.
    I added the default gatway from the command line and i am posting this from 11.4 now.
    this is not the fix but it is verification of the problem.

    My Router is a Cisco/Linksys E2000 dual band N firmware version 1.0.04 wich is current.
    the wireless card is AR2413 802.11bg NIC (PCMCIA)
    DHCP has no problems for wireless to win XP (caugh caugh my wifes) win7 (my sons) my SUSE 11.1 and my old 11.3 wireless and hardwired.
    Only when I upgraded to 11.4 did the problem start.
    Also i set the DHCP network setting to IPV4 only in the beginning and verified it is still set this way.
    What next I will try to connect via hardwire tomorrow and will post the findings.

  9. #9

    Default Re: No Internet after install of 11.4 Network connections fine

    Solution

    When I went to check the Hardwire connection i went in connection manager to change eth0 to start on cable connect and i saw the the DHCP setting was set to both IPV4 and 6.
    I reset it to IPV 4 only and finished the connection. When it finished eth0 connected correctly, the default gateway was there.
    i removed it and went back to the wireless connection and the default gateway was there too. I shut down and restarted several times and it worked correctly every time.

    Therefore make sure all netwok connections that are present active or not must be set to DHCP IPV4 only, this worked for me.

  10. #10
    Join Date
    Sep 2010
    Location
    Poland
    Posts
    1,970

    Default Re: No Internet after install of 11.4 Network connections fine

    I've just bookmarked this thread thanks for the read all it's been very interesting.

    Best regards,
    Greg
    Best regards,
    Greg

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