PR劫持介绍
什么是PR劫持？
先给大家举个例子：某个网站，百度收录10，谷歌收录8，其他搜索引擎都是个位数的收录量，但是该网站的PR值却是7。为什么呢？查了才知道，这一个网站通过域名跳转到一个PR值为7的网站上。这就是最简单的PR劫持。现在做站的，有很多人都很看重谷歌PR值,虽然它对排名起的作用不是很大（特别是针对百度排名），但它却是体现网站权重的一个重要指标。换个角度从利益出发，高PR值的链接往往可以带来不少收益。所以也就有了PR劫持。简单地说，PR劫持就是用欺骗手段获得工具条上比较高的PR值显示。
PR劫持所用的方法有哪些？
第一种方法是利用跳转。也就上面那个例子所用的方法，一般搜索引擎在处理301或302转向的时候，都是把目标地址当作实际应该收录的地址。也就是说如果从域名A做301或302跳转到高PR值的域名B上，那么域名A在PR值更新后，就会显示域名B的PR值。通常域名A会在PR值更新过后，立刻取消转向，同时获得与域名B相同的PR值。一般这个假的PR值会持续两三个月的时间（即一个PR更新周期）
第二种方法通过程序欺骗谷歌机器人，做法和第一种类似，首先利用程序检测到谷歌机器人，然后返回301或302转向，对普通访问者和其他搜索引擎机器人都返回正常内容。那么用户看到的就是普通网站，只有谷歌会看到转向。
第三种方法利用域名绑定，相对于上面两种方法，这一种风险高且需要一定的技术，步骤是利用黑客技术，进入目标网站所在服务器，在服务器上直接绑定自己需要的域名，这种方式获得的PR值，搜索引擎不一定认为这是作弊。
怎么判断PR劫持？
PR劫持判断方法也蛮多的，比如看谷歌的网页快照是否和你看到的网页是同一个网站。还可以通过查询反向链接，根据所查询到的链接寻找可疑点（如果某个网站内页链接到主域名的比较多，那么被劫持的网站可能就是这个）；还有一个最简单的方法利用相关查询工具或是到PR检测网站查询都行。
43条评论 关于 “PR劫持介绍”
写得挺专业的。
只是对这个概念的一些见解而已，谈不上专业。。。
这一般都是高手完成的作业啊，瓜瓜、、
嘻嘻。。。。
学习了，谢谢教导！~~o(∩_∩)o…
一起学习。。。。
博主！我来拜访您了，有时间看看我的网站噢，不好的地方多指点噢。http://www.bi9foot178.com/
博主！我来拜访您了，有时间看看我的网站噢，不好的地方多指点噢。
指点不敢说，互相学习。。。。
看了剑3大脚的网站，可以尝试增加一些高质量的外链，貌似关键词密度有点高。。。
学习下~
共同进步。。。
呵呵。你的网站太简洁了。呵呵。日志，留言
简单点好。。。
踢馆！踢馆！踢馆！呵呵，开玩笑，你的www.gtongxue.com真不错，来好几次了
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回复Fishermans wharf restaurant：Sorry, my English is limited.so,I don’t really know what you mean.
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回复Dara Schaffer：Just to share some of my ideas.
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