Web Hosting Talk : Other Forums : Web Hosting Lounge : Google Question

[hcn]

I heard that Google now using a new technology which somehow discounts links from the same ip block.
Is there anyone knows about that?

[JayC]

Groundless speculation. It's a rumor that crops up from time to time, and has part of some peoples' guesses about what happened with the last, controversial Google update.

But that's all it is; there's no evidence to support it and there is evidence to refute it.

[RDX1]

Why not send them and email and ask?

help@google.com

[kris1351]

The indexes are done via name and not IP. This is a rumor as JayC said. You are perfectly safe being on a shared with your Google indexes, we have customers at PR6+ on shared.

[RDX1]

I think what he means, if someone on the same ip block links to them, then the link wouldn't count, am i right?

[JayC]

I believe that is what he meant, and it is what I was talking about.

[hcn]

What I meant was all of my sites are on the same server. Some of my sites PR 6 some of them PR5. Each site is connected with each other via links to increase link populairty. If that rumor i s true, then, my sites links to each other would not count or count less??

[v7toc]

Originally posted by JayC
Groundless speculation.

Not really groundless.

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.

US Patent 6,526,440 , Assigned to Google

[JayC]

Originally posted by v7toc
US Patent 6,526,440 , Assigned to Google

Those paragraphs are actually aimed at detecting similar content and mirror sites -- not sites on "similar hosts" that "provide significant new information to the user." Different sites on the same host or the same IP block are a different issue.

Certainly they can do it. But there isn't evidence that it's done routinely in the current implementation of PageRank at Google. Even pages from the same site contribute as much as those from other sites.

But, by no means does that mean that interlinking a bunch of your own sites from the same IP block (or elsewhere) is without risks. Artificial linking patterns can be identified, and can be -- and sometimes are -- penalized. Getting hit with a site-specific penalty could be far more damaging than simply disregarding certain of your links.

If you're interlinking your own sites, be sure that each of those sites has a good set of its own links in and out.

[amusive.com]

I read a GoogleGuy post where he said your IP doesn't matter, although it was in a slightly different context (virtual hosting versus IP based). Not sure if it applies to this, but really... unless you're link farming I don't see how this is a big deal.

[v7toc]

Originally posted by JayC
Those paragraphs are actually aimed at detecting similar content and mirror sites -- not sites on "similar hosts" that "provide significant new information to the user." Different sites on the same host or the same IP block are a different issue.

They are aimed at detecting affiliated sites. Google assumes that a link is not natural - that it is affiliated - if the link is from the same IP. It's not a wholesale voiding of inter-IP links. It's just a downgrading.

Originally posted by JayC
Certainly they can do it. But there isn't evidence that it's done routinely in the current implementation of PageRank at Google. Even pages from the same site contribute as much as those from other sites.

PageRank isn't the whole of Google's ranking algorithm. But, yes, there is evidence that Google has implemented an IP filter, besides their patent. One site I'm aware of had hundreds of links from hundreds of sites. All on the same IP. The site, for over 6 months now, remains PR0.

Google has the ability to filter links and diminish PR transfer in a number of circumstances. Among those, Google publicly states that guestbook links don't count in the ranking algo, even when they show up as backlinks in a "link:www.domain.com" search.

Also, you might want to look into the phpBB issue. Normally, 15,600 links from a PR10 site would give you something close to PR9. But many of the sites that bought links from phpBB aren't seeing any PR increase. (E.g., www.hostgator.com at PR5).

There is a article by a guy who purchased some of those links over at the Search Engine Roundtable -

Google Blocking Domains From Passing Page Rank