Python.org, Website of Satan

[Denis S. Otkidach]

On Fri, 14 Jan 2005 11:16:59 +0000
Michael Hoffman <cam.ac.uk at mh391.invalid> wrote:

> from socket import gethostbyaddr, herror
> 
> for a in xrange(256):
>      if a < 666-255*3:
>          continue
>      for b in xrange(256):
>          if a+b < 666-255*2:
>              continue
>          for c in xrange(256):
>              if a+b+c < 666-255:
>                  continue
>              for d in xrange(256):
>                  if a + b + c + d == 666:

Certainly, it can be done more efficient:

for a in xrange(256):
    for b in xrange(max(0, (666-255*2)-a), 256):
        for c in xrange(max(0, (666-255)-a-b), min(666-a-b+1, 256)):
            d = 666-a-b-c
            ...

I've checked these IPs with ip2cc (which can miss entries registered
last month): there are 2907248 "evil" addresses, most of them (1568430)
in USA.  Too many to resolve.

-- 
Denis S. Otkidach
http://www.python.ru/      [ru]