A meal let me know what is PR hijacking

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What is the PR hijacking, may be for the old webmaster know, for me this old newcomer, still is a strange noun, did not think unexpectedly let me personally experienced, through a meal price, let me understand there is such a liar, in this way to cheat.

PR hijacking, that is, using deception to get the higher PR value display on the tool bar. The method is to use the jump. The general search engine in processing 301 and 302 turn, is the target URL as the actual should be included in the URL. Of course there are exceptions, but in most cases this is the case. So if you are from domain A do 301 or 302 jump to the domain name B, and the PR value of domain B is higher, domain A in the PR update, will also show the PR value of domain name B. The simplest is to do 301 or 302 jump to high PR domain name B, such as PR update, immediately cancel the turn, but also obtained and B station the same PR value. This fake PR display value to maintain at least until the next PR update, generally has two or three months or more time (recently GG update a bit slow).

Things are like this, because the update is imminent, want to give their own station, add point weight, in the Webmaster Trading Forum Link Trading Plate, there is a so-called pr=6 beauty picture site, the post is also in the forum, I hope the administrator as soon as possible to delete the seal processing. The price is not expensive, also 30 yuan/month, after a bargain, said 20 yuan/month, but at that time in whispered, the price is too cheap point, but later thought, that is, dozens of yuan, not a big money, Taobao pay, we remember this liar Taobao name is called Li, then feel not too right, after inquiries, Baidu is not included, Google only dozens of included, immediately feel cheated, through the query http://www.linkhelper.cn, found to be hijacked PR, show is: The site's PR may be hijacked www.zzchn.com the site. Although the amount is not large, but also very BS this behavior, so take out to share, do not want more people through the "meal" to learn what is called PR hijacking.

I will speak in detail on the web search PR hijacked some of the principles and methods, with everyone:

Through the program detected Google spiders, return 301 or 302 to turn, to ordinary visitors and other spiders return to normal content. So what we're seeing is a regular site, and only Google will see the shift. For example, the following PHP code can achieve this effect:

?
if (strstr ($_server[' http_user_agent '), "Googlebot")) {
Header ("http/1.1 moved Permanently");
Header ("location:http://www.xxx.com");
Exit;
}
else {
Header (' content-type:text/html; charset=iso-8859-1′);
};
?>
These two methods to get the PR value, are not their own domain name true PR value.

PS: Generally this is the PR value of the person's goal is also very obvious, is to sell links, sell pr. However, the links on this site have no contribution to the PR value.

The following is a more common way to judge PR hijacking

Method One:

PR Detection website http://www.linkhelper.cn.

Method Two:

Look at Google's snapshot of the Web page, Google snapshots and you see the page is not the same site, (general website title and logo will be displayed), very suspicious, the Web page snapshot of that site is PR hijacked the target site.

The method of the defect: as long as the site hijacked after the end of the update to their own website, Google will be indexed new sites, that this time can not see the original site traces, it can not confirm the PR is hijacked, but also can not know which site hijacked. This method only applies to hijacking a target site after converting to its own site soon.

Method Three:

Look at the reverse link, and then according to the reverse link to determine which is the real site. For example: Xxxxx.com PR is 4, and it.xxxxx.com PR is 6, although this is the authenticity is relatively large, but check found that it's two-level domain name suspected PR hijacking. Login to Google, in the search box input: link:it.xxxxx.com, search results in the site is to provide backlinks to the site, any open a, in the inside to find it.xxxxx.com links, did not find. Another random find a few, still did not find, this means that the station's PR is hijacked (more than a few sites can increase the credibility of the results of this judgement).

Confirmed that the site is a PR hijacking, the following to find the site hijacked which site of the PR, you can do this: see link out of the results of which station more, is generally the site. Because link's results and hijacked PR Web site link is the same, and was hijacked PR site page link to the main domain name more, so the general result of more than that station is hijacked site. We have seen in the results of a large number of content from it.com.cn, so the preliminary judgment of the site is hijacked it.com.cn pr. The method is simple to verify the results of the judgment just now. Compared with link:it.xxxxx.com and link:it.com.cn, if it is the same, it means that the judgment is correct. Enter link:it.xxxxx.com in Google, look at the results of the query, and then enter link:it.com.cn to see the results of the query. Both search results exactly the same, so it can be sure that it.xxxxx.com is hijacked by the it.com.cn PR.

Another noteworthy is that when looking for and buy links, if the other side show off is high PR value, must be very careful. Link should be based on the relevance of the main consideration, PR high and low on the actual ranking impact is not as important as many people think.

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