[dns-operations] best way to reprime root-hints?

Joe Abley jabley at ca.afilias.info
Mon Feb 4 23:59:06 UTC 2008

On 4-Feb-2008, at 17:39, bert hubert wrote:

> I hope the root-servers all speak EDNS0 :-)

Why hope when you can just try it? There are only 13 to try :-)

[calamari:~]% for n in a b c d e f g h i j k l m; do
for> echo -n "${n}: "
for> dig +notcp +bufsize=1400 @${n}.root-servers.net . ns | \
for pipe> egrep -c 'IN[[:space:]]+A'
for> done
a: 19
b: 19
c: 19
d: 19
e: 19
f: 19
g: 19
h: 19
i: 19
j: 19
k: 19
l: 19
m: 19

Without EDNS0, the number of (A+AAAA) seen in response to the same  
query is less than 19.


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