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adicionar protração contra sites mailiciosos no /etc/hosts

#!/bin/bash
# Criado em:Qua 15/Dez/2010 hs 15:22
# Last Change: 2010 Dez 15 17:43:19
# vim:ft=sh:fdm=syntax:nu:
# Instituicao: none
# Proposito do script: proteger o /etc/hosts colocando proteção contra sites maliciosos
# Autor: Sérgio Luiz Araújo Silva
# site: http://vivaotux.blogspot.com
# twitter: http://www.twitter.com/voyeg3r
# source: https://www.ibm.com/developerworks/
# source short url: http://ur1.ca/2lihx

# para que este script rode semanalmente faça
# cp atualiza-etc-hosts.sh /etc/cron.weekly/

# Only root make this work
if [ "$(id -u)" != "0" ]; then
    echo "  Need be root"
    sleep 2
    exit  1
fi

# get md5sum from site
MD5SUM=`wget -qO -  http://www.mvps.org/winhelp2002/hosts.htm | \
    sed 's/<[^>]*>//g' - | awk '/SHA-1/ {print $1}' | tr 'A-Z' 'a-z'`

# get md5sum from atual /etc/hosts
MD5SUMOLDFILE=`md5sum hosts.txt | awk '{print $1}'`

# compare two md5sums and perform apropriate action
if [ "MD5SUM" != "MD5SUMOLDFILE" ] 2>/dev/null ; then
    echo "Downloading the new version..."
    wget -c http://www.mvps.org/winhelp2002/hosts.txt -O /etc/hosts
    sed -i.backup 's/\x0D$//g' /etc/hosts
else
    echo "Your /etc/hosts already updated"
fi
https://snipt.net/embed/3bb4e256558fde2506e09962eae119fa/
/raw/3bb4e256558fde2506e09962eae119fa/
3bb4e256558fde2506e09962eae119fa
bash
Bash
40
2019-06-26T07:20:20
True
False
False
/api/public/snipt/22144/
adicionar-protracao-contra-sites-mailiciosos-no-etchosts
<table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><a href="#L-1"> 1</a> <a href="#L-2"> 2</a> <a href="#L-3"> 3</a> <a href="#L-4"> 4</a> <a href="#L-5"> 5</a> <a href="#L-6"> 6</a> <a href="#L-7"> 7</a> <a href="#L-8"> 8</a> <a href="#L-9"> 9</a> <a href="#L-10">10</a> <a href="#L-11">11</a> <a href="#L-12">12</a> <a href="#L-13">13</a> <a href="#L-14">14</a> <a href="#L-15">15</a> <a href="#L-16">16</a> <a href="#L-17">17</a> <a href="#L-18">18</a> <a href="#L-19">19</a> <a href="#L-20">20</a> <a href="#L-21">21</a> <a href="#L-22">22</a> <a href="#L-23">23</a> <a href="#L-24">24</a> <a href="#L-25">25</a> <a href="#L-26">26</a> <a href="#L-27">27</a> <a href="#L-28">28</a> <a href="#L-29">29</a> <a href="#L-30">30</a> <a href="#L-31">31</a> <a href="#L-32">32</a> <a href="#L-33">33</a> <a href="#L-34">34</a> <a href="#L-35">35</a> <a href="#L-36">36</a> <a href="#L-37">37</a></pre></div></td><td class="code"><div class="highlight"><pre><span></span><span id="L-1"><a name="L-1"></a><span class="ch">#!/bin/bash</span> </span><span id="L-2"><a name="L-2"></a><span class="c1"># Criado em:Qua 15/Dez/2010 hs 15:22</span> </span><span id="L-3"><a name="L-3"></a><span class="c1"># Last Change: 2010 Dez 15 17:43:19</span> </span><span id="L-4"><a name="L-4"></a><span class="c1"># vim:ft=sh:fdm=syntax:nu:</span> </span><span id="L-5"><a name="L-5"></a><span class="c1"># Instituicao: none</span> </span><span id="L-6"><a name="L-6"></a><span class="c1"># Proposito do script: proteger o /etc/hosts colocando proteção contra sites maliciosos</span> </span><span id="L-7"><a name="L-7"></a><span class="c1"># Autor: Sérgio Luiz Araújo Silva</span> </span><span id="L-8"><a name="L-8"></a><span class="c1"># site: http://vivaotux.blogspot.com</span> </span><span id="L-9"><a name="L-9"></a><span class="c1"># twitter: http://www.twitter.com/voyeg3r</span> </span><span id="L-10"><a name="L-10"></a><span class="c1"># source: https://www.ibm.com/developerworks/</span> </span><span id="L-11"><a name="L-11"></a><span class="c1"># source short url: http://ur1.ca/2lihx</span> </span><span id="L-12"><a name="L-12"></a> </span><span id="L-13"><a name="L-13"></a><span class="c1"># para que este script rode semanalmente faça</span> </span><span id="L-14"><a name="L-14"></a><span class="c1"># cp atualiza-etc-hosts.sh /etc/cron.weekly/</span> </span><span id="L-15"><a name="L-15"></a> </span><span id="L-16"><a name="L-16"></a><span class="c1"># Only root make this work</span> </span><span id="L-17"><a name="L-17"></a><span class="k">if</span> <span class="o">[</span> <span class="s2">&quot;</span><span class="k">$(</span>id -u<span class="k">)</span><span class="s2">&quot;</span> !<span class="o">=</span> <span class="s2">&quot;0&quot;</span> <span class="o">]</span><span class="p">;</span> <span class="k">then</span> </span><span id="L-18"><a name="L-18"></a> <span class="nb">echo</span> <span class="s2">&quot; Need be root&quot;</span> </span><span id="L-19"><a name="L-19"></a> sleep 2 </span><span id="L-20"><a name="L-20"></a> <span class="nb">exit</span> 1 </span><span id="L-21"><a name="L-21"></a><span class="k">fi</span> </span><span id="L-22"><a name="L-22"></a> </span><span id="L-23"><a name="L-23"></a><span class="c1"># get md5sum from site</span> </span><span id="L-24"><a name="L-24"></a><span class="nv">MD5SUM</span><span class="o">=</span><span class="sb">`</span>wget -qO - http://www.mvps.org/winhelp2002/hosts.htm <span class="p">|</span> <span class="se">\</span> </span><span id="L-25"><a name="L-25"></a> sed <span class="s1">&#39;s/&lt;[^&gt;]*&gt;//g&#39;</span> - <span class="p">|</span> awk <span class="s1">&#39;/SHA-1/ {print $1}&#39;</span> <span class="p">|</span> tr <span class="s1">&#39;A-Z&#39;</span> <span class="s1">&#39;a-z&#39;</span><span class="sb">`</span> </span><span id="L-26"><a name="L-26"></a> </span><span id="L-27"><a name="L-27"></a><span class="c1"># get md5sum from atual /etc/hosts</span> </span><span id="L-28"><a name="L-28"></a><span class="nv">MD5SUMOLDFILE</span><span class="o">=</span><span class="sb">`</span>md5sum hosts.txt <span class="p">|</span> awk <span class="s1">&#39;{print $1}&#39;</span><span class="sb">`</span> </span><span id="L-29"><a name="L-29"></a> </span><span id="L-30"><a name="L-30"></a><span class="c1"># compare two md5sums and perform apropriate action</span> </span><span id="L-31"><a name="L-31"></a><span class="k">if</span> <span class="o">[</span> <span class="s2">&quot;MD5SUM&quot;</span> !<span class="o">=</span> <span class="s2">&quot;MD5SUMOLDFILE&quot;</span> <span class="o">]</span> 2&gt;/dev/null <span class="p">;</span> <span class="k">then</span> </span><span id="L-32"><a name="L-32"></a> <span class="nb">echo</span> <span class="s2">&quot;Downloading the new version...&quot;</span> </span><span id="L-33"><a name="L-33"></a> wget -c http://www.mvps.org/winhelp2002/hosts.txt -O /etc/hosts </span><span id="L-34"><a name="L-34"></a> sed -i.backup <span class="s1">&#39;s/\x0D$//g&#39;</span> /etc/hosts </span><span id="L-35"><a name="L-35"></a><span class="k">else</span> </span><span id="L-36"><a name="L-36"></a> <span class="nb">echo</span> <span class="s2">&quot;Your /etc/hosts already updated&quot;</span> </span><span id="L-37"><a name="L-37"></a><span class="k">fi</span> </span></pre></div> </td></tr></table>
bash, hack, hosts, security