AS
Maury [18] presents a different attack that also ex-
ploits the delegations of name-servers in a referral re-
sponse. However, the attack (called iDNS attack) PAF
is at most 10x. In iDNS the attacker’s name-server sends
self-delegations (back and forth to the attacker’s name-
server) up to an infinite depth. A major difference from
our work is that the glueless name-servers in the iDNS
attack are never used against an external server such as
a victim name-server. Some measures have been taken
by different DNS vendors such as BIND and UNBOUND
following the disclosure of iDNS described in [18], how-
ever these measures do not affect and do not weaken the
NXNSAttack.