blocklist

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Get bad ip's list from blocklist.de, uceprotect.net, binarydefense, firehol, danger.rulez.sk put them on Firewall and keep robots, bruteforces, etc, so far away..

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The List:

• the download is for what type of bad ips? The ips try get access the following ports or services:

  • 21
  • 22
  • 23
  • 25
  • 80
  • 110
  • 143
  • 443
  • 993
  • apache
  • asterisk
  • bots
  • bruteforcelogin
  • courierimap
  • courierpop3
  • dnsbl
  • email
  • ftp
  • imap
  • ircbot
  • pop3
  • submission
  • postfix
  • sip
  • ssh

====Usage:====

Automatic blocklist on Firewall:

Create:

• a table <blocklist> on your "pf.conf"

table <blocklist> persist file "/var/db/blocklist"

• a rule to block
• ie: assume ext_if="em0"

block drop in log quick on $ext_if from <blocklist> to any

if you want not block 'maybe' a some legitimate email and sender notified "why was rejected" by your mail system change rule to:

block drop in log quick on $ext_if proto tcp from <blocklist> to any port != smtp
block drop in log quick on $ext_if proto { udp, icmp } from <blocklist> to any

First run script manually, if all will be ok Then Add on crontab to run ie: every 2 hours

#minute (0-59)
#|	   hour (0-23)
#|      |       day of the month (1-31)
#|      |       |       month of the year (1-12 or Jan-Dec)
#|      |       |       |       day of the week (0-6 with 0=Sun or Sun-Sat)
#|      |       |       |       |       who
#|      |       |       |       |       |       commands
#|      |       |       |       |       |       |
00      */2     *       *       *       root    /usr/local/sbin/blocklist > /dev/null 2>&1

#to execute script on startup
@reboot root    /usr/local/sbin/blocklist > /dev/null 2>&1

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Check if get all:

"pfctl -t blocklist -T show | wc -l"

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• Tools:
  • FreeBSD/OpenBSD
  • Wget

• doesn't work on bash

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[^]: The .csh extension in file it is not necessary, has placed only for github detect correct syntax highlighting language on source