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Thread: Unable to connect to a small number of random websites: Otherwise networking is fine

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  1. #1
    Join Date
    Mar 2007
    Beans
    118
    Distro
    Kubuntu 7.10 Gutsy Gibbon

    Unable to connect to a small number of random websites: Otherwise networking is fine

    Okay. I have a crazy problem.

    I was having no problems (that I knew of) browsing the web since installing Ubuntu 10.10 a week or so ago. I was previously trialling Win7 as my customers will likely be using that in the future.

    Then I wanted to go to internode.on.net. Got the following:
    Firefox can't establish a connection to the server at internode.on.net.
    or
    Oops! Google Chrome could not connect to internode.on.net
    As it was just after Christmas I thought it must be down, for upgrades or maintenance etc. I later tried to go to Freebsd.org; same error. I've been having a small number of other websites give the same error. I thought nothing of this until I tried it on my wife's macpro. I could log onto all the websites I wanted to and none gave any indication of having been down. Both boxes are on the same adsl connection.

    I still can't access internode or freebsd on 10.10 yet have been able to access every website on OSX. Now, I was only looking at them for info but am worried I won't be able to access something important. (so far everything I 'need' is working)

    ping just drops out.

    edit: weirdest thing! I just retried and now can not emulate the problem for internode. freebsd still won't show. that is less than five minutes between problems and resolution! Thanks people! I hadn't even posted! But I still would like to have an idea of what is going on. Here is the ping error for freebsd:
    ping -c 4 freebsd.org
    PING freebsd.org (32.1.4.248) 56(84) bytes of data.

    --- freebsd.org ping statistics ---
    4 packets transmitted, 0 received, 100% packet loss, time 3005ms
    what else can I try to figure out what is going on?

  2. #2
    Join Date
    Jan 2006
    Beans
    164

    Re: Unable to connect to a small number of random websites: Otherwise networking is

    you can run a traceroute. It shows where the requests are being made at each point between your pc and the site. It should be under network tools in the tab next to ping. The command line is most likely tracert site.com

  3. #3
    Join Date
    Mar 2007
    Beans
    118
    Distro
    Kubuntu 7.10 Gutsy Gibbon

    Re: Unable to connect to a small number of random websites: Otherwise networking is

    As I feared, it has got more serious: I can't install extensions!

    Code:
    :~$ traceroute https://addons.mozilla.org
    https://addons.mozilla.org: Name or service not known
    Cannot handle "host" cmdline arg `https://addons.mozilla.org' on position 1 (argc 1)
    :~$ traceroute http://addons.mozilla.org
    http://addons.mozilla.org: Name or service not known
    Cannot handle "host" cmdline arg `http://addons.mozilla.org' on position 1 (argc 1)
    Code:
    :~$ traceroute addons.mozilla.org
    traceroute to addons.mozilla.org (63.245.209.91), 30 hops max, 60 byte packets
     1  mygateway1.ar7 (10.1.1.1)  0.743 ms  0.991 ms  1.232 ms
     2  * * *
     3  bri-sot-wic-csw2-gi-1-3.tpgi.com.au (202.7.173.137)  49.130 ms  52.708 ms  56.143 ms
     4  bri-sot-wic-crt1-gi-2-0-0.tpgi.com.au (203.29.135.1)  59.429 ms  62.250 ms  65.176 ms
     5  bri-nxg-alf-crt1-POS-8-0.tpgi.com.au (202.7.171.253)  69.441 ms  72.532 ms  75.707 ms
     6  syd-sot-ken-crt1-TG-7-0-0.tpgi.com.au (202.7.171.125)  96.004 ms  92.480 ms  96.092 ms
     7  xe-7-0-0.edge1.SanJose3.Level3.net (4.53.208.13)  280.010 ms  240.742 ms  240.614 ms
     8  ae-2-79.edge8.SanJose1.Level3.net (4.68.18.84)  240.742 ms ae-4-99.edge8.SanJose1.Level3.net (4.68.18.212)  240.844 ms  240.898 ms
     9  CWIE-LLC.edge8.SanJose1.Level3.net (4.53.30.34)  297.297 ms  293.247 ms  290.207 ms
    10  te-8-2.core2.sjc.mozilla.net (63.245.208.98)  248.437 ms  244.743 ms  245.085 ms
    11  * * *
    12  * * *
    13  * * *
    14  * * *
    15  * * *
    16  * * *
    17  * * *
    18  * * *
    19  * * *
    20  * * *
    21  * * *
    22  * * *
    23  * * *
    24  * * *
    25  * * *
    26  * * *
    27  * * *
    28  * * *
    29  * * *
    30  * * *
    Code:
     releases.mozilla.org
    traceroute to releases.mozilla.org (32.1.6.176), 30 hops max, 60 byte packets
     1  mygateway1.ar7 (10.1.1.1)  0.559 ms  0.805 ms  1.052 ms
     2  * * *
     3  bri-sot-wic-csw1-gi-1-3.tpgi.com.au (202.7.173.125)  49.452 ms  52.833 ms  55.752 ms
     4  bri-sot-wic-crt1-gi-2-1-0.tpgi.com.au (202.7.171.217)  59.260 ms  62.371 ms  65.540 ms
     5  bri-nxg-alf-crt2-POS-7-0.tpgi.com.au (202.7.171.245)  69.290 ms  72.650 ms  75.819 ms
     6  syd-sot-ken-crt2-ge-0-0.tpgi.com.au (202.7.171.133)  90.951 ms  87.523 ms  91.157 ms
     7  Vlan516.icore1.SQN-SanJose.as6453.net (66.198.97.33)  289.159 ms * *
     8  if-5-1886.tcore2.LVW-LosAngeles.as6453.net (209.58.116.38)  251.363 ms  250.926 ms  251.008 ms
     9  if-2-2.tcore1.LVW-LosAngeles.as6453.net (66.110.59.1)  251.083 ms  251.181 ms  250.489 ms
    10  192.205.35.129 (192.205.35.129)  248.606 ms  244.222 ms  244.850 ms
    11  cr2.la2ca.ip.att.net (12.122.129.34)  310.922 ms  310.305 ms  310.410 ms
    12  cr1.slkut.ip.att.net (12.122.30.29)  310.622 ms  310.761 ms  310.677 ms
    13  cr2.dvmco.ip.att.net (12.122.30.26)  310.349 ms  310.253 ms  312.391 ms
    14  cr1.cgcil.ip.att.net (12.122.31.86)  310.794 ms  309.750 ms  309.960 ms
    15  cr2.wswdc.ip.att.net (12.122.18.22)  310.911 ms  309.617 ms  309.236 ms
    16  12.122.134.237 (12.122.134.237)  309.610 ms  309.538 ms  308.942 ms
    17  * * *
    18  * * *
    19  * * *
    20  * * *
    21  * * *
    22  * * *
    23  * * *
    24  * * *
    25  * * *
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    29  * * *
    30  * * *
    Code:
    :~$ ping -c 4 releases.mozilla.org
    PING releases.mozilla.org (32.1.6.176) 56(84) bytes of data.
    
    --- releases.mozilla.org ping statistics ---
    4 packets transmitted, 0 received, 100% packet loss, time 3005ms

  4. #4
    Join Date
    Oct 2009
    Location
    Tucson, AZ
    Beans
    782
    Distro
    Ubuntu 10.10 Maverick Meerkat

    Re: Unable to connect to a small number of random websites: Otherwise networking is

    You won't be able to complete a traceroute to a lot of sites because of the way their networks or set up. Google is an exception. You might be missing hops but you can always make it to the final server in Google's network.

    Pinging releases.mozilla.org is a bad test too because that host points a random IP address for any one of hundreds of servers in their mirror network.

    If you can get the full path to the addon you're downloading, try changing releases.mozilla.org to ftp.mozilla.org. For example, change http://releases.mozilla.org/pub/mozi...y-1.4.1-fx.jar to http://ftp.mozilla.org/pub/mozilla.o...y-1.4.1-fx.jar

    The problems you're experiencing sound like they're your ISP's fault, not anything in your setup. That being said there's one command you can run that might reveal something funky:
    Code:
    route
    There might be something weird in your routing table that's sending traffic somewhere it shouldn't.

  5. #5
    Join Date
    Mar 2007
    Beans
    118
    Distro
    Kubuntu 7.10 Gutsy Gibbon

    Re: Unable to connect to a small number of random websites: Otherwise networking is

    Well thanks bloke!

    Ah... route:
    Code:
    Kernel IP routing table
    Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
    10.1.1.0        *               255.255.255.0   U     1      0        0 eth0
    link-local      *               255.255.0.0     U     1000   0        0 eth0
    default         mygateway1.ar7  0.0.0.0         UG    0      0        0 eth0
    Should the first interface be 10.1.1.1? That is, my 'router', or should it be my machine .5?

  6. #6

    Re: Unable to connect to a small number of random websites: Otherwise networking is

    Tried pinging the site and using the ip as the address?
    Ab Aeterno Scientia Potentia est

    http://thevoid.in/

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