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#!/bin/bash
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#-------------------------- =+- Shell script -+= --------------------------
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#
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# Yaroslav Halchenko CS@UNM, CS@NJIT
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# web: http://www.onerussian.com & PSYCH@RUTGERS
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# e-mail: yoh@onerussian.com ICQ#: 60653192
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#
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# DESCRIPTION (NOTES):
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#
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# Script to fetch list of agent strings from http://www.user-agents.org
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# which are known to be from malicious bots, and create apache-badbots.conf
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# filter for fail2ban
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#
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# COPYRIGHT: Yaroslav Halchenko 2007-2013
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#
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# LICENSE:
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the
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# Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
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# MA 02110-1301, USA.
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#
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# On Debian system see /usr/share/common-licenses/GPL for the full license.
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#
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#-----------------\____________________________________/------------------
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url=http://www.user-agents.org/index.shtml
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badbots=$(
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for f in "" "?g_m" "?moz" "?n_s" "?t_z"; do
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wget -q -O- $url$f;
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done \
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| grep -h -B4 '<td class="smallcell" nowrap>S </td>'\
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| sed -e 's/ //g' \
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| awk '/^--/{getline; gsub(" ",""); print $0}' \
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| sed -e 's/\([.\:|()+]\)/\\\1/g' \
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| uniq \
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| tr '\n' '|' \
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| sed -e 's/|$//g'
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)
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echo $badbots >| /tmp/badbots.tmp
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cat >| config/filter.d/apache-badbots.conf <<EOF
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# Fail2Ban configuration file
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#
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# Regexp to catch known spambots and software alike. Please verify
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# that it is your intent to block IPs which were driven by
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# above mentioned bots.
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[Definition]
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badbotscustom = EmailCollector|WebEMailExtrac|TrackBack/1\.02|sogou music spider
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badbots = $badbots
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failregex = ^<HOST> -.*"(GET|POST).*HTTP.*"(?:%(badbots)s|%(badbotscustom)s)"$
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ignoreregex =
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# DEV Notes:
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# List of bad bots fetched from http://www.user-agents.org
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# Generated on `date` by $0.
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#
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# Author: Yaroslav Halchenko
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EOF
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