From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Dumazet <eric.dumazet@gmail.com>
Subject: Re: regression when connecting to ipv6 localhost
Date: Mon, 15 Oct 2012 15:21:33 +0200
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Cc: Joe Perches <joe@perches.com>, netdev@vger.kernel.org
To: Jan Hinnerk Stosch <janhinnerk.stosch@gmail.com>
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On Mon, 2012-10-15 at 15:10 +0200, Jan Hinnerk Stosch wrote:
> 2012/10/15 Eric Dumazet <eric.dumazet@gmail.com>:
> > On Mon, 2012-10-15 at 04:25 -0700, Joe Perches wrote:
> >
> >>
> >> It looks more like a recently introduced app defect though.
> >>
> >
> >> Jan's using a newer version of ntp than you are.
> >> https://bugs.archlinux.org/task/31775
> >> ntp 4.2.6.p5-11
> >
> >> Perhaps the defect was introduced in the ntp code with
> >> this change:
> >>
> >> http://bk.ntp.org/ntp-stable/lib/isc/unix/interfaceiter.c?PAGE=diffs&REV=4e12bf8dJoMBgRoYzI9851nTqVBhgQ
> >
> >
> > It seems you missed fact that /proc/net/if_inet6 doesnt include lo
> > device for Jan machine.
> >
> > Even an old ntpd (or ifconfig -a) wont see lo device ::1 address if not
> > listed in /proc/net/if_inet6
> >
> > "ip -6 addr" doesnt parse /proc/net/if_inet6
> >
> 
> Now I can confirm, that the file contains no loopback interface.

OK thanks

Now we have to find why ::1 is missing.

Can you send : 

lsmod