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Avatar Went Hot: March 4, 2008 - 6:34 pm
Posted By: SiteMost 122 days ago
Topic Type: News Story (Jump to http://www.searchenginejournal.com)
Category: SEO
Is having a dedicated IP address critical for achieving great Google rankings and if an IP address is shared among many sites, is the PageRank for each site diluted?
8 Comments     

Comments

from chrisdru 121 days ago #
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Does Google ban websites based on their IP?

from SlightlyShadySEO 121 days ago #
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@chrisdu:Very rare occasions. Only if the IP is 100% blackhat, and it has a history of that. I've only heard of it once or twice.

from DavidLaFerney 121 days ago #
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Google needs to deliver high quality results to keep it's position.  The competition needs to do the same if they are to have any hope of gaining market share.  Since the hosting arrangement has absolutely nothing to do with the desired result it only makes sense that what Google has been saying is true - IP address doesn't matter.

from jmaulson 120 days ago #
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@DavidLaFerney, from one of the patent documents
"Re-ranking component 122 begins by identifying the documents in the initial set that have a hyperlink to
document x. (Act 301). The set of documents that have such hyperlinks are denoted as B(y). Documents from the
same host as document x tend to be similar to document x but often do not provide significant new information to
the user. Accordingly, re-ranking component 124 removes documents from B(y) that have the same host as
document x. (Act 302). More specifically, let IP3(x) denote the first three octets of the IP (Internet Protocol)
address of document x (i.e., the IP subnet). If IP3(x)=IP3(y), document y is removed from B(y).
On occasion, multiple different hosts may be similar enough to one another to be considered the same host for
purposes of Acts 301 and 302. For example, one host may be a "mirror" site for a different primary host and thus
contain the same documents as the primary host. Additionally, a host site may be affiliated with another site, and
thus contain the same or nearly the same documents. Similar or affiliated hosts may be determined through a
manual search or by an automated web search that compares the contents at different hosts. Documents from
such similar or affiliated hosts may be removed by re-ranking component 124 from B(y) in Act 302. Re-ranking
component 124 next compares all pairs of documents in B(y) for any pair in which IP3(first document of the pair)
=IP3(second document of the pair), and removes the document of the pair from B(y) that has the lower OldScore
value. (Acts 303-306). In other words, if there are multiple documents in B(y) for the same (or similar or
affiliated) host IP address, only the document most relevant to the user's search query, as determined by the
document's OldScore, is kept in B(y). Documents are removed from B(y) in this manner to prevent any single
author of web content from having too much of an impact on the ranking value. "

from davidbain 120 days ago #
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You've got to be very unlucky to be banned or de-ranked by Google just for sharing IPs.

I've had multiple websites hit the top of Google search results for competitive keyword phrases on shared IPs.

More important is that you don't own multiple websites discussing the same subject on the same IP - and especially don't continually interlink between websites on the same IP.

from DarkMatter 120 days ago #
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If Google penalized/devalued sites based on their hosting status, they'd be punishing the vast majority of websites. It's almost physically impossible for every single website to be hosted on it's own dedicated server; there are a finite amount of IP addresses. Google would be shooting themselves in the foot if they penalized based on shared status alone. Banned IPs are another matter, but as Shady said, extremely rare.

from DavidLaFerney 120 days ago #
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@jmaulson - Yes, it would make sense that if your game is to have multiple sites competing in the same search space then they should probably be on different servers, probably in different names for that matter.  But if the subjects of your add on domains are beekeeping, cellular biology, and international currency arbitrage then you're probably good.

from oldschool 119 days ago #
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This debate has been going on for years and I am glad Matt said (paraphrasing) "... it's the same as it was back in 2003".

With respect to "bad neighborhoods" - One thing I have always done is to make sure I never host with companies that claim to host gambling or porn sites. I have not had any problems over the past decade on either shared or dedicated.


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