📄 0270dynamic_dns.htm
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<br><font size="-1" color="#ffffff" face="SimSun">email=$email&passwd=$password&hostname=$hostname&debug=1&\</font><br><font size="-1" color="#ffffff" face="SimSun">forceip=$newip"</font><br><font size="-1" color="#ffffff" face="SimSun">       lynx -dump $HOST > /dev/null 2>&1</font><br><font size="-1" color="#ffffff" face="SimSun">}</font></p><p><font size="-1" color="#ffffff" face="SimSun"># 这个函数在更新防火墙机制</font><br><font size="-1" color="#ffffff" face="SimSun">iptablesrule() {</font><br><font size="-1" color="#ffffff" face="SimSun">       [ -f /usr/local/virus/iptables/iptables.rule ] && \</font><br><font size="-1" color="#ffffff" face="SimSun">       sh /usr/local/virus/iptables/iptables.rule</font><br><font size="-1" color="#ffffff" face="SimSun">}</font></p><p><font size="-1" color="#ffffff" face="SimSun"># 这个函数取得您的DNS 主机名与 IP 是否相同！</font><br><font size="-1" color="#ffffff" face="SimSun">getdnsip (){</font><br><font size="-1" color="#ffffff" face="SimSun">       dnsip=`host $hostname | awk '{print $4}'`</font><br><font size="-1" color="#ffffff" face="SimSun">}</font></p><p><font size="-1" color="#ffffff" face="SimSun">#</font><br><font size="-1" color="#ffffff" face="SimSun">#======================ONLY EMAIL SESSION jobs 1 =====================</font><br><font size="-1" color="#ffffff" face="SimSun">  if ["$jobs" == "1" ]; then</font><br><font size="-1" color="#ffffff" face="SimSun">     # 1. Get the older IP and newer IP</font><br><font size="-1" color="#ffffff" face="SimSun">       oldip</font><br><font size="-1" color="#ffffff" face="SimSun">       getip</font><br><font size="-1" color="#ffffff" face="SimSun">       while [ "$newip" == "" ]</font><br><font size="-1" color="#ffffff" face="SimSun">       do</font><br><font size="-1" color="#ffffff" face="SimSun">               checkip</font><br><font size="-1" color="#ffffff" face="SimSun">               getip</font><br><font size="-1" color="#ffffff" face="SimSun">       done</font></p><p><font size="-1" color="#ffffff" face="SimSun">     # 2. compare with older IP and newer IP. And e-mail to you</font><br><font size="-1" color="#ffffff" face="SimSun">       if [ "$newip" != "$oldip" ]; then</font><br><font size="-1" color="#ffffff" face="SimSun">               mailtoyou       # just mail to you</font><br><font size="-1" color="#ffffff" face="SimSun">       fi</font><br><font size="-1" color="#ffffff" face="SimSun">       exit 0</font><br><font size="-1" color="#ffffff" face="SimSun">  fi</font></p><p><font size="-1" color="#ffffff" face="SimSun">#======================EMAIL and UPDATE SESSION job 2 ================</font><br><font size="-1" color="#ffffff" face="SimSun">  if ["$jobs" == "2" ]; then</font><br><font size="-1" color="#ffffff" face="SimSun">     # 1. Get the older IP and newer IP</font><br><font size="-1" color="#ffffff" face="SimSun">       oldip</font><br><font size="-1" color="#ffffff" face="SimSun">       getip</font><br><font size="-1" color="#ffffff" face="SimSun">       while [ "$newip" == "" ]</font><br><font size="-1" color="#ffffff" face="SimSun">       do</font><br><font size="-1" color="#ffffff" face="SimSun">               checkip</font><br><font size="-1" color="#ffffff" face="SimSun">               getip</font><br><font size="-1" color="#ffffff" face="SimSun">       done</font></p><p><font size="-1" color="#ffffff" face="SimSun">     # 2. compare with older IP and newer IP. And e-mail to you</font><br><font size="-1" color="#ffffff" face="SimSun">       if [ "$newip" != "$oldip" ]; then</font><br><font size="-1" color="#ffffff" face="SimSun">               mailtoyou       # just mail to you</font><br><font size="-1" color="#ffffff" face="SimSun">               updateforyou    # just update for you</font><br><font size="-1" color="#ffffff" face="SimSun">               sleep 3s</font><br><font size="-1" color="#ffffff" face="SimSun">               iptablesrule    # just reflush iptables rule</font><br><font size="-1" color="#ffffff" face="SimSun">       fi</font></p><p><font size="-1" color="#ffffff" face="SimSun">     # 3. check if the DNS name == newip</font><br><font size="-1" color="#ffffff" face="SimSun">       getdnsip</font><br><font size="-1" color="#ffffff" face="SimSun">       if [ "$newip" != "$dnsip" ]; then</font><br><font size="-1" color="#ffffff" face="SimSun">               updateforyou    # just update for you</font><br><font size="-1" color="#ffffff" face="SimSun">               sleep 3</font><br><font size="-1" color="#ffffff" face="SimSun">               iptablesrule    # just reflush iptables rule</font><br><font size="-1" color="#ffffff" face="SimSun">       fi</font><br><font size="-1" color="#ffffff" face="SimSun">       exit 0</font><br><font size="-1" color="#ffffff" face="SimSun">  fi</font></p><p><font size="-1" color="#ffffff" face="SimSun">#======================SHARE IP MECHANIME job 3 ======================</font><br><font size="-1" color="#ffffff" face="SimSun">  if ["$jobs" == "3" ]; then</font><br><font size="-1" color="#ffffff" face="SimSun">     # 1. Get the older IP and newer IP</font><br><font size="-1" color="#ffffff" face="SimSun">       oldip</font><br><font size="-1" color="#ffffff" face="SimSun">       newip=`lynx -dump "http://www.adsldns.org/login.php?email=$email&passwd=$password"|grep 您好|cut -d":" -f2|sed 's/ .*$//g'`</font></p><p><font size="-1" color="#ffffff" face="SimSun">     # 2. compare with older IP and newer IP. And e-mail to you</font><br><font size="-1" color="#ffffff" face="SimSun">       if [ "$newip" != "$oldip" ]; then</font><br><font size="-1" color="#ffffff" face="SimSun">               mailtoyou       # just mail to you</font><br><font size="-1" color="#ffffff" face="SimSun">               updateforyou    # just update for you</font><br><font size="-1" color="#ffffff" face="SimSun">               sleep 3s</font><br><font size="-1" color="#ffffff" face="SimSun">               iptablesrule    # just reflush iptables rule</font><br><font size="-1" color="#ffffff" face="SimSun">       fi</font></p><p><font size="-1" color="#ffffff" face="SimSun">     # 3. check if the DNS name == newip</font><br><font size="-1" color="#ffffff" face="SimSun">       getdnsip</font><br><font size="-1" color="#ffffff" face="SimSun">       if [ "$newip" != "$dnsip" ]; then</font><br><font size="-1" color="#ffffff" face="SimSun">               updateforyou    # just update for you</font><br><font size="-1" color="#ffffff" face="SimSun">               sleep 3</font><br><font size="-1" color="#ffffff" face="SimSun">               iptablesrule    # just reflush iptables rule</font><br><font size="-1" color="#ffffff" face="SimSun">       fi</font><br><font size="-1" color="#ffffff" face="SimSun">       exit 0</font><br><font size="-1" color="#ffffff" face="SimSun">  fi</font></p></td></tr></tbody></table> <br>上面的 script 您可以在 <a href="http://linux.vbird.org/download/index.php#ping_net_card" target="_blank">http://linux.vbird.org/download/index.php#ping_net_card</a>下载，至于安装的方法就相当的简单啦！您只要下载该 script ，然后将他移动到适当的目录之下，修改一下上面显示粗体字的地方，然后再修改您的/etc/crontab ！嘿嘿！那就成功啰！<br> <table bgcolor="#000000" border="1" cols="1" width="650"><tbody><tr><td><font size="-1" color="#ffffcc" face="SimSun">1. 下载 script并移动到适当的目录：</font><br><font size="-1" face="SimSun"><font color="#ffffff">[root@testroot]# </font><font color="#ffff00">wget http://linux.vbird.org/download/vbird/ping_net_card.sh</font></font><br><font size="-1" face="SimSun"><font color="#ffffff">[root@testroot]# </font><font color="#ffff00">mkdir -p /usr/local/pingcard</font></font><br><font size="-1" face="SimSun"><font color="#ffffff">[root@testroot]# </font><font color="#ffff00">cp ping_net_card.sh /usr/local/pingcard</font></font><br><font size="-1" face="SimSun"><font color="#ffffff">[root@testroot]# </font><font color="#ffff00">chmod 744 /usr/local/pingcard/ping_net_card.sh</font></font><br><font size="-1" face="SimSun"><font color="#ffffff">[root@testroot]# </font><font color="#ffff00">vi /usr/local/pingcard/ping_net_card.sh</font></font><br><font size="-1" color="#ff6666" face="SimSun"># 这个时候进入vi 的画面，请依照您的需求来修改 INPUT 的部分！</font><br><font size="-1" color="#ffff99" face="SimSun"> </font><br><font size="-1" color="#ffffcc" face="SimSun">2. 修改 crontab </font><br><font size="-1" color="#ffffff" face="SimSun">[root@testroot]# vi /etc/crontab</font><br><font size="-1" color="#ff6666" face="SimSun"># ....新增加一行：</font><br><font size="-1" color="#ffffff" face="SimSun">*/3 * * * *root /usr/local/pingcard/ping_net_card.sh</font></td></tr></tbody></table> <br>嘿嘿！这样一来，如果您的主机不正常的断电之后，在三分钟之内就会自动的拨接，此外，还会自动的上网去更新您的DNS 主机名称！还会 e-mail 到您的信箱去！告诉您最新的 IP 是什么！哈哈！简不简单呀！？( 注：因为我没有 cable modem ，所以在 cable 的部分我是经由网友回报而做成的script ！此外，我也没有 IP 分享器！所以第三个 jobs=3 还没有测试过！无论如何，jobs=1 是完全没有问题的！此外，针对朋友们常常发生的 lynx 没有安装的问题，这是我也先将他写了一个小小的检查档案，可以告诉朋友们！嘿！您的lynx 安装了没？！ )<br> <br><hr width="100%"><a name="need_dynamic_noip"></a><font color="#000099">动态DNS -- http://www.no-ip.com</font><br> <br>除了 www.adsldns.org 之外，我们还有其它的选择，那就是 no-ip 这家公司所提供的免费动态DNS 系统啦！申请的方法如下：<br> <ol><li><font color="#000099">登入主网页：</font></li><br>在如下的图示当中，因为我们要注册一个新的网域，所以就给他选择如下的『<font color="#000066">Sign-up-Free!</font>』那一项：<br><img src="0270dynamic_dns_files/no-ip-01.jpg" nosave="" height="171" width="503"><br> ⌨️ 快捷键说明
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