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: Sun, 14 Oct 2012 22:25:14 +0200
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To: Jan Hinnerk Stosch <janhinnerk.stosch@gmail.com>
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On Sun, 2012-10-14 at 21:57 +0200, Jan Hinnerk Stosch wrote:
> 2012/10/14 Eric Dumazet <eric.dumazet@gmail.com>:
> > On Sun, 2012-10-14 at 21:48 +0200, Jan Hinnerk Stosch wrote:
> >
> >> ntp.conf is (without comments):
> >> server fritz.box iburst
> >> restrict default noquery nopeer nomodify
> >> restrict 127.0.0.1
> >> restrict ::1
> >> driftfile /var/lib/ntp/ntp.drift
> >> logfile /var/log/ntp.log
> >>
> >> "lsof -p `pidof ntpd`" gives nothing
> >>
> >> and "ntpq -p ::1" results in the same timeout error "::1: timed out,
> >> nothing received
> >> ***Request timed out".
> >
> > So your ntpd is not running ?
> >
> > ps aux | grep ntpd
> >
> >
> >
> 
> No, of course it is running:
> ntp        368  0.0  0.0  31288  2128 ?        Ss   16:51   0:00
> /usr/bin/ntpd -g -u ntp:ntp


Hmm

pidof ntpd

should give you the pid of ntpd process : 368

So try 

lsof -p 368  # instead of lsof -p `pidof ntpd`