Below is a sample copy of a csf.deny file.

###############################################################################
# Copyright 2006-2010, Way to the Web Limited
# URL: http://www.configserver.com
# Email: sales@waytotheweb.com
###############################################################################
# The following IP addresses will be blocked in iptables
# One IP address per line
# CIDR addressing allowed with a quaded IP (e.g. 192.168.254.0/24)
# Only list IP addresses, not domain names (they will be ignored)
#
# Note: If you add the text “do not delete” to the comments of an entry then
# DENY_IP_LIMIT will ignore those entries and not remove them
#
# Advanced port+ip filtering allowed with the following format
# tcp/udp|in/out|s/d=port|s/d=ip
#
# See readme.txt for more information regarding advanced port filtering
#
217.219.244.41 #
67.117.201.128 #
117.0.0.0/8 # (117.0.0.0 – 117.255.255.255)
23.20.0.0/14 # (23.20.0.0 – 23.23.255.255)
50.16.0.0/15 # (50.16.0.0 – 50.17.255.255)
50.19.0.0/16 # (50.19.0.0 – 50.19.255.255)
67.202.0.0/18 # (67.202.0.0 – 67.202.63.255)
72.44.32.0/19 # (72.44.32.0 – 72.44.63.255)
75.101.128.0/17 # (75.101.128.0 – 75.101.255.255)
107.20.0.0/14 # (107.20.0.0 – 107.23.255.255)
174.129.0.0/16 # (174.129.0.0 – 174.129.255.255)
184.73.0.0/16 # (184.73.0.0 – 184.73.255.255)
184.72.128.0/17 # (184.72.128.0 – 184.72.255.255)
184.72.64.0/18 # (184.72.64.0 – 184.72.127.255)
204.236.192.0/18 # (204.236.192.0 – 204.236.255.255)
23.20.0.0/14 # (23.20.0.0 – 23.23.255.255)
207.148.192.0/19 # (207.148.192.0 – 207.148.223.255)
93.0.0.0/8 # (93.0.0.0 – 93.255.255.255)
211.167.96.0/19 # (211.167.102.1 – 211.167.102.255)
66.194.6.0/24 # (66.194.6.0 -66.194.6.255)
91.194.158.0/23 # (91.194.158.0 – 91.194.158.255)
192.132.210.0/24 # (192.132.210.0 – 192.132.210.255)
204.15.64.0/21 # (204.15.64.0 – 204.15.64.255)
208.80.192.0/21 # (208.80.194.0 – 208.80.194.255)
38.0.0.0/8 # (38.0.0.0 – 38.255.255.255)
80.79.112.0/20 # (80.79.120.128 – 80.79.120.255)
109.0.0.0/8 # (109.0.0.0 – 109.255.255.255)
92.0.0.0/8 # (92.0.0.0 – 92.255.255.255)
67.112.0.0/12 # (67.112.0.0 – 67.127.255.255)
50.16.0.0/14 # (50.16.0.0 – 50.19.255.255)

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Stephan Pringle

Chief Executive Officer at Sipylus

About The Author: Stephan Pringle is an Information Technology Specialist. He covers hardware and software and provides tips for you to troubleshoot and repair issues on your own. In his spare time, he writes articles about the State of New York on his Hackintosh and HackBook and that has helped him to become the top contributor of the New York City section of Yahoo! Answers.

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