[dns-operations] "NS .", the attack of the month?

[Stephane Bortzmeyer]

On Sun, Jan 25, 2009 at 12:44:56AM +0100,
 Jelte Jansen <jelte at NLnetLabs.nl> wrote 
 a message of 36 lines which said:

> ~> sudo tcpdump port 53 -w - | ldns-dpa -f 'qtype=NS&qr=0' -sf | grep From:

Does not work with 1.4.0:

% sudo tcpdump -n -i eth0 port 53 -w - | ldns-dpa -f 'qtype=NS&qr=0' -sf 
tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
parse error: unknown match name: qtype
...