How good/bad is the impact of back link from the same IP address?

it is a common problem for us who using shared hosting, i have three domain in the same server and another two domain in another same server, how bad is this for SEO (in case i back link from one to another).

 

IMO small linking (1 page only) is not too bad, but heavy linking (sitewide or similar) is not recommended mainly if sites are not theme related.

 

It makes no difference. Stop being so affraid of every decision.

Think about blogspot. How many servers do they have? And look at how many blogspot blogs link to each other. Google are not out to get you.

 

Blogspot is not a good example because those links are for subdomains inside same site.

 

Google sees subdomains as being completely seperate sites.
Google sees no relation between sub1.domain.com and sub2.domain.com

 

i have links from my sites to some of my other sites,some on the same IP and it helps with BL and PR as ive seen

 

Okay what about the links that we are getting in terms of signatures.......there are som many from the same site ? do they hurt ?

 

I use different IP address for my new two blogs and the two blogs with the same IP, I will see the different of PR and backlilnk after google update.. but as long as I know, google will ignoring backlink from site with the same IP address.. just hope that this is wrong..

 

It should make so difference as long as they are different domains. I have had great success with linking from subdomains among each other. Google is very aware of shared hosting and does not penalize for it.

 

Agreed.

Avoid sitewide cross-linking of sites on same IPs.

4 of my sites got banned in Google because I crossed link all of them with sitewides.

 

So what did you do then? Did you get out of it?

 

Not yet.

Made all links to "no-follow" and sent a reinclusion request.

I had five sites interconnected. Maybe that was too much for Google.

The sitewides must have triggered a flag and Google did a manual review of all sites.

One of the sites, which had a different whois info and was registered with a different registrar didn't get banned.

I am still working on them as Yahoo is sending decent traffic.

 

yeah don't go for sitewide interlink if its hosted on same IP. If its link each other from one or two place then its fine.

 

how do you send google a reinclusion request? how long has it been since you've been banned?

 

If you are using Google webmaster tools, , you can send a "reconsideration request" from here:

https://www.google.com/webmasters/tools/reinclusion?hl=en

Since Oct 2006. I have already given up hope and am focusing on other sites. .

 

Don't give up! Keep persevering! Check out these links for some great advice on how to get back into Google's good books (and index! ): link 1 and link 2

Matt Cutt's article regarding writing up a reinclusion request helped me a bunch.

 

probably doesn't hurt too much but I probably would not do it in a lot of cases unless one site had a very high PR like 6+. I would rather just try to get an extra link from another site but I still doubt it matters too much

 

I think google can spot link networks regardless of shared ip's, so don't think it matters much.

 

you will find that ip address will have less and less importance because the internet has a finite amount of ip addresses and then also some hosts put thousands of sites on the same ip - for example - mosso.com has 1 ip address for every php4 site, 1 for every php5 site and 1 for every windows IIS site. thats it... they have 15,000+ customers with thousands of sites on basically 3 ip addresses...

 

Yes, that's true but with upcoming IPv6 the amount of ip addresses is practically unlimited:
IPv4 supports 2^32 (about 4.3 billion)
IPv6, however, supports 2^128 (about 340 billion billion billion billion), or approximately 5×10^28 addresses for each of the roughly 6.5 billion people alive today.