Hoe ip adres te blokkeren?

dit vond ik op internet over het gebruik van de "hosts" map in windows xp:



# copyright (c) 1993-1999 microsoft corp.
#
# this is a sample hosts file used by microsoft tcp/ip for windows.
#
# this file contains the mappings of ip addresses to host names. each
# entry should be kept on an individual line. the ip address should
# be placed in the first column followed by the corresponding host name.
# the ip address and the host name should be separated by at least one
# space.
#
# additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# for example:
#
# 102.54.94.97 rhino.acme.com # source server
# 38.25.63.10 x.acme.com # x client host

127.0.0.1 localhost

# the following comments have been added to microsoft's:
# to add entries that you wish to block:
# place 127.0.0.1 and the host name of the
# server on the same line with a space between them
# as shown above. do not remove the line above.
# you may remove this comment section if you wish.

# then, place this file in the c:\windows directory
# (if you use windows 95/98)
# and rename it from "hostsplain.txt" to "hosts" -
# make sure you do not have a txt extension on it after
# you rename it.

# place the file in the c:\winnt\system32\drivers\etc
# directory if you use windows nt/2000