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IP Addresses on Same Machine and Google



8:40 pm on May 23, 2008 (gmt 0)

10+ Year Member

Two of my websites are hosted on the same dedicated server. The first two blocks of numbers for both of their IP addresses are the same. The last two blocks of numbers are totally different. Since the third block was the C-block, and that needs to be different in order for Google to value the link of one pointing to another, then I should be ok here if I want to link from one to the other, right?

But isn't the whole idea that if two sites are on the same machine, Google knows they're owned by the same entity, therefore discounting links from one to the other? And don't the first two blocks say that they're on the same server if they match? So I guess I am confused how the C-block - or third block of numbers - can tell Google that they are not owned by the same entity if they are the same?


2:49 am on May 24, 2008 (gmt 0)

WebmasterWorld Senior Member tedster is a WebmasterWorld Top Contributor of All Time 10+ Year Member

I use links between two websites on the exact same IP address without seeing any penalties. The links may not transmit as much juice as a link from a truly independent website, but I don't expect them to. The main reason for the link is to help the users anyway. If not being penalized is your only concern, you should be OK as long as you don't do heavy duty cross-linking.

In my opinion, too much has been made of the "different C-block" issue. Google can see patterns of relationship between websites through many factors -- whois data, coding footprints, un-"natural" nodes on their link graphs, and so on.

Hiding a relationship between two websites is not a fruitful focus of effort and resources, in my opinion. Same B-block, same C-block. shared IP address -- I would not give this area much concern. It takes a diverse backlink profile to compete strongly, at any rate.


8:25 am on May 24, 2008 (gmt 0)

Have different C class, even B class for that matter but on the same machine, thus same name server is definitely going to account for less link juice, but there is no penalty.


3:47 pm on May 24, 2008 (gmt 0)

10+ Year Member

yeah, that is kinds what I was thinking

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