ecn

sharewall is very good

#
# Shorewall version 4 - Ecn File
#
# For information about entries in this file, type "man shorewall-ecn"
#
# The manpage is also online at
# http://www.shorewall.net/manpages/shorewall-ecn.html
#
###############################################################################
#INTERFACE	HOST(S)
#LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE