On Wed, Apr 04, 2012 at 10:26:11PM +0200, Marco Davids (Prive) <mdavids@forfun.net> wrote a message of 8 lines which said:

Something seems wrong with the DNS of 'tools.ietf.org'.

Can you be more specific? It works for me except that one name server does not actually exist (but it does not prevent the domain from working). % zonecheck tools.ietf.org ERROR: Unable to find nameserver IP address(es) for grenache.levkowetz.com (NXDOMAIN, indeed)