Examples illustrate the adverse effects of pan-parsing on SEO

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A few days ago through webmaster tools to find a Web site with IP under a strange domain name binding, so notify technology processing, but inadvertently found that the site has been a problem-the use of the pan-resolution. As a result of the use of the pan-resolution, site:***.cn home page, there will be a lot of strange two-class domain names, these domain names may be the user after the use of traces are searched by search engines and included down, the following figure:

　　

A cluttered two-level domain name generated after a universal resolution

　　What is universal parsing?

That is, the customer's domain name #.com under the *.#.com all resolved to the same IP address up.

For example, customers set up 1.#.com will automatically resolve to the same IP address with #.com.

What do you mean "can explain" the domain name? This means that there is a domain name that explicitly sets the direction. For example, the DNS settings are as follows:

Www.***.cn-> 0.0.0.0

Bbs.***.cn-> 0.0.0.1

Then, access to www.***.cn normal to 0.0.0.1, access to other arbitrary 3w.***.cn, as long as the "3w" is not a BBS, then will go to 0.0.0.0.

　　What is the effect of universal resolution?

1. Domain name can be allowed to support unlimited subdomain (this is also the largest use of universal Domain name resolution).

2. Prevent the user from wrong input caused by the site can not access the problem.

What is the adverse effect of the pan-parsing on SEO?

After a successful pan-resolution, can be in a short period of time to create a large number of two domain names or three domain names, that is to allow search engines in a short period of time included in a large number of two-level domain name or three-level domain name of the page, so that the site's collection will be a lot of increase, but also

The problem is, the search engine is not a fool, a large number of duplicate content appears in different pages, search engine will not hesitate to judge for Bi: Baidu will be under the domain name of all two-level domain name to reduce the right to deal with, the specific performance is not included or included a very small number (usually 1) of the two-level domain Name page, Google has a direct disregard for these two-level domain names.

　　How should we use the pan-parsing?

1, stop using the pan-resolution, if you need to use the level two domain name, then use the two-level domain name to the corresponding directory;

2, if you have done a pan-resolution, you can use technical means to search engine included pages such as dasdasd.abc.com jump to www.abc.com under.

Many times the portal site uses universal parsing for the user experience, is mainly concerned about the user to lose the wrong two domain name and jump to the wrong page, in fact, standing in the SEO perspective, the pan-analysis of the site itself is harmful, it is likely to lead to the site was judged as bi and down the right, so later we in the use of universal resolution must be prudent

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