Two domain name in the same root of web hosting

[hench2008]

I have two domain names in the same hosting.They are all in root direcotry.

you can enter the www.AAA.com into the web,and you also can enter the www.A-BB.com into the same web.

The former one,AAA.com's age is 3 years old,so it has 4 RP value,and the A-BB is the newest page, so it has no RP value.

I donot know whether this mean will affect the AAA.com's optimization?Will it lose the PR value?

Who could help me to know it?

Thanks in advance.

[g1smd]

Are you saying that both domain names show the same content for all pages?

If so, then that is classic Duplicate Content.

You probably have example.com and www.example.com also showing duplicates.

You need to redirect the three non-canonical versions to the canonical form, site wide, with a 301 redirect.

There are a very large number of previous threads on this topic, many with example code.

[hench2008]

Thanks for your reply.

I buy new domain name and hosting from my host company, and i parse the old domain into the same root.

However they are in same IP address, should them need 301 redirect?

I also use "http://www.webrankinfo.com/english/tools/server-header.php" ,and it show as follow:

HTTP/1.1 200 OKContent-Length: 20293Content-Type: text/htmlContent-Location: [name.com...] Mon, 15 Dec 2008 23:13:46 GMTAccept-Ranges: bytesETag: "0719cc7a5fc91:4c74b"Server: Microsoft-IIS/6.0X-Powered-By: ASP.NETDate: Fri, 26 Dec 2008 04:44:06 GMTConnection: close

200: request completed (OK)
201: object created, reason = new URI
202: async completion (TBS)
203: partial completion
204: no info to return
205: request completed, but clear form
206: partial GET furfilled
300: server couldn't decide what to return
301: object permanently moved
302: object temporarily moved
303: redirection w/ new access method
304: if-modified-since was not modified
305: redirection to proxy, location header specifies proxy to use
307: HTTP/1.1: keep same verb
400: invalid syntax
401: access denied
402: payment required
403: request forbidden
404: object not found
405: method is not allowed
406: no response acceptable to client found
407: proxy authentication required
408: server timed out waiting for request
409: user should resubmit with more info
410: the resource is no longer available
411: the server refused to accept request w/o a length
412: precondition given in request failed
413: request entity was too large
414: request URI too long
415: unsupported media type
500: internal server error
501: required not supported
502: error response received from gateway
503: temporarily overloaded
504: timed out waiting for gateway
505: HTTP version not supported

should i need to do 301 redirect?

[edited by: caveman at 11:16 pm (utc) on Dec. 28, 2008]
[edit reason] Removed specifics per TOS [/edit]

[g1smd]

Yes. You are showing the same website four times at four different URLs.

Three of the URL versions need the 301 redirect.

[hench2008]

"same website four times at four different URLs"? Why do you say it?

How could you know it?

But in that description,it show that "301: object permanently moved
"

[g1smd]

Use Live HTTP Headers for Firefox and it will show you that all four URLs for each page return "200 OK".

So, you have four identical websites as far as Google is concerned.

Add the correct redirect code, so that three of them return "301 Moved".

Then, people can still use any of the four URLs to access your site, but only one of them will be indexed.

Additionally, redirect to strip index filenames from URLs.