<s>
The	O
Smurf	B-Protocol
Amplifier	I-Protocol
Registry	I-Protocol
is	O
a	O
blacklist	O
of	O
networks	B-Architecture
on	O
the	O
Internet	O
which	O
have	O
been	O
misconfigured	O
in	O
such	O
a	O
way	O
that	O
they	O
can	O
be	O
used	O
as	O
smurf	O
amplifiers	O
for	O
smurf	O
denial	O
of	O
service	O
attacks	O
.	O
</s>
<s>
It	O
can	O
probe	O
networks	B-Architecture
for	O
vulnerability	O
to	O
smurf	O
amplification	O
,	O
and	O
then	O
will	O
either	O
add	O
them	O
to	O
its	O
database	O
,	O
or	O
remove	O
them	O
from	O
the	O
database	O
,	O
depending	O
on	O
the	O
result	O
of	O
the	O
test	O
.	O
</s>
