#
#
# Smurf.fix.txt
#
#
http://www.cert.org/advisories/CA-1998-01.html
#
#
# Smurf Description
http://www.pentics.net/denial-of-service/white-papers/smurf.cgi
#
http://www.ircnetops.org/smurf
#
http://www.netscan.org
#
http://www.math.ucla.edu/misc/smurf.html
#
#
# On the Cisco router
# -------------------
   interface Serial0
	...
	no ip directed-broadcast	<<--- add this to all interfaces
#
#
#
# On the machine that is replying to the incoming smurf attack
# ------------------------------------------------------------
#	turn off ping broadcasts
#
echo 1 >  /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts 
#
#
# end of file