No IPv6 traffic

Sun Aug 30 00:15:45 UTC 2009

On Sat, 29 Aug 2009 11:26:06 -0400
Jim <mickeyboa at sbcglobal.net> wrote:

> On 08/29/2009 06:23 AM, Clodoaldo Pinto Neto wrote:
> > When capturing the traffic with Wireshark there is no IPv6 traffic
> > at all. When I set network.dns.disableIPv6 to true I can see all
> > IPv4 in Wireshark. This is Fedora 10 64.
> >
> > While it is easy to solve it for Firefox there are many services
> > that can't connect even if I disable IPv6 in the system. One
> > symptom is Yum has to try repetitively until it finds a suitable
> > host:
> >
> > http://mirrors.ucr.ac.cr/fedora/releases/10/Everything/x86_64/os/repodata/repomd.xml:
> > [Errno 4] IOError:<urlopen error (-2, 'Name or service not known')>
> > Trying other mirror.
> >
> > Another is that the weather applet and folding at home can't connect.
> > When I disable IPv6 in the system the applet connects but Yum
> > behaves the same (multiple tries) and still folding at home can't
> > connect.
> >
> > My name servers are set to opendns:
> >
> > # cat /etc/resolv.conf
> > # Generated by NetworkManager
> > nameserver 208.67.220.220
> > nameserver 208.67.222.222
> > nameserver 10.1.1.1
> >
> > # cat /etc/sysconfig/network
> > NETWORKING=yes
> > HOSTNAME=d2.localdomain
> > NETWORKING_IPV6=yes
> >
> > # cat /etc/sysconfig/network-scripts/ifcfg-eth0
> > # Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit
> > Ethernet controller
> > DEVICE=eth0
> > BOOTPROTO=none
> > DNS1=208.67.220.220
> > DNS2=208.67.222.222
> > DNS3=10.1.1.1
> > GATEWAY=10.1.1.1
> > HWADDR=00:21:97:00:79:21
> > IPADDR=10.1.1.110
> > NETMASK=255.0.0.0
> > ONBOOT=yes
> > TYPE=Ethernet
> > USERCTL=no
> > IPV6INIT=yes
> > NM_CONTROLLED=yes
> > PEERDNS=yes
> >
> > I have another machine, F11, behind the same ADSL router, Dlink DSL
> > 500B, without problems.
> >
> > Any ideas?
> >
> > Regards, Clodoaldo
> >
> >    
> This IPV6 thing is a problem in FC11 , FC10, everyone of the of the
> 12 boxes I have setup in FC11 I have had to do the below setup to
> even connect to rpmfusion.org.

Turning IPv6 related DNS lookups off (even in firefox) is NOT fixing the
issue - will people please stop posting this utter trash as helpful
information please? There's enough myths around IPv6 as it is and this
isn't helping.

(plus such people might want to look at how the getaddrinfo() call
works..)

The problem is the OP has *enabled* IPv6 - loaded the module etc. but
hasn't *configured* it. It won't magically set up a tunnel / 6to4 /
native connection, you have to do a little more tweaking

See ipv6-6to4.howto in the initscripts documentation
(/usr/share/doc/initscripts-<version>/) for a brief primer on 6to4,
which will get you up and going without having to sign up for a tunnel
broker etc.

I have two IPv6 tunnels running - one on a Fedora 10 server (qbert,
served by my ISP here in Australia) and a CentOS VM (gyruss) through
Hurricane Electric - both work OK

[root at qbert ~]# traceroute6 fedoraproject.org
traceroute to fedoraproject.org (2610:28:200:1::fed0:1), 30 hops max,
80 byte packets 
1  2001:44b8:61::62 (2001:44b8:61::62)  61.238 ms
63.470 ms  65.738 ms
2  vl67.cor1.adl6.internode.on.net
(2001:44b8:8060:8000::1)  67.064 ms  69.794 ms  70.104 ms
3 gi0-0.bdr1.adl6.internode.on.net (2001:44b8:8060:14::1)  72.050 ms * *
4  pos4-2.bdr1.syd7.internode.on.net (2001:44b8:b070:2::1)  98.805 ms *
*
5  pos1-3-0.bdr2.nrt1.internode.on.net (2001:44b8:f0a0:2::1)  217.948
ms  219.611 ms  221.365 ms

6  equinix-tyo.he.net (2001:de8:5::6939:1) 223.472 ms  197.651 ms
198.828 ms
7  2001:470:0:119::1 (2001:470:0:119::1)  310.388 ms
310.695 ms  309.959 ms
8 10gigabitethernet3-2.core1.pao1.he.net
(2001:470:0:32::2)  286.479 ms 286.684 ms  283.265 ms
9
snvang.abilene.ucaid.edu (2001:504:d::bd) 318.081 ms  318.509 ms
318.226 ms
10  * * *
11  * * *
12 2001:468:ffff:155::2
(2001:468:ffff:155::2)  358.482 ms  358.215 ms 357.666 ms
13 2610:28:10e:2::1 (2610:28:10e:2::1)  393.498 ms  393.133 ms  392.833
ms 
14  2610:28:105:13::2 (2610:28:105:13::2)  360.110 ms 360.089 ms
360.863 ms
15  2610:28:200:1::fed0:1 (2610:28:200:1::fed0:1)  361.113
ms !X 360.678 ms !X  361.396 ms !X

[mfleming at gyruss ~]$ traceroute6 fedoraproject.org
traceroute to fedoraproject.org (2610:28:200:1::fed0:1), 30 hops max, 40 byte packets
 1  dotprofile-1.tunnel.tserv8.dal1.ipv6.he.net (2001:470:1f0e:16f::1)  8.000 ms  8.000 ms  8.000 ms
 2  gige-g2-14.core1.dal1.he.net (2001:470:0:78::1)  8.000 ms  8.000 ms  8.000 ms
 3  10gigabitethernet1-4.core1.chi1.he.net (2001:470:0:c4::1)  36.002 ms  36.002 ms  36.002 ms
 4  ge-2-2-0.11.rtr.chic.net.internet2.edu (2001:504:0:4:0:1:1537:1)  56.003 ms  56.003 ms  56.003 ms
 5  * * *
 6  2001:468:ffff:155::2 (2001:468:ffff:155::2)  68.004 ms  60.003 ms  60.004 ms
 7   (2610:28:10e:2::1)  64.004 ms  64.004 ms  64.004 ms
 8   (2610:28:105:13::2)  64.004 ms  64.004 ms  64.004 ms
 9   (2610:28:200:1::fed0:1)  68.004 ms !X  68.004 ms !X  68.004 ms !X

Michael.

-- 
Michael Fleming <mfleming at thatfleminggent.com> - (EMail/XMPP/Jabber)
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