To be a great SEO Black Hat, your spam clusters need to be difficult to spot. You can’t make it easy for Google or any search engine to ban all of your sites.
You want to make sure you know what search engines are looking at today and anticipate what they will be looking at tomorrow.
Search Engines already look at IP addresses and add-on domains for link value. In many cases, Google doesn’t even show backlinks from 1 add-on domains to another under a single account. While Google may not look at Domain Name Servers YET, they probably soon will.
Think of it this way: If you were Google and saw that you had to ban 15, 20, or 100 Spamdex sites from a certain IP address, domain or DNS, what would you do?
Ban, change the algorithm, penalize, sandbox, weigh the links less, red flag, bad neighborhood . . . whatever you want to call it – you know they are either doing something, or planning to do something about it.
So, one of the first step to building a brilliant spam cluster is the intelligent allocation of IP addresses and DNS. While I’ve only heard rumors of entire class C addresses getting banned, I do know that less weight is given to a link from the same Class C than from other Class Cs. Consecutive IP addresses are just barely better than the same IP address for link value.
What you want to do is have as many Class C IP addresses as you can cheaply acquire.
I know many Spammers just use 1 IP address, all add-on domains, and just the 4 name servers. You can still have moderate (and possibly great) success as a Black Hat Search Engine Spammer doing this.
Normally, if you get a site banned, it won’t affect your other add-on domains. But why take the chance? Even if the others are not banned, are they now on some sort of watch-list for manual review? Are spammy IP addresses being worked into the Search Engines Algorithms as we speak? I say, take the advice of Andrew Grove, the Co-founder and chairman of Intel Corporation, whose business motto is:
“Only the paranoid survive.”
While it’s most likely just 1 addon domain will be banned at a given time, you could get an entire IP address banned or hosting account canceled for Black Hat SEO. If all of your projects are under the same hosting account (with the same IP), you run the risk of having all your projects wiped out overnight.
Some hosting companies offer unlimited DNS and multiple accounts. Others offer multiple Class Cs, multiple data centers, and most offer unlimited add-on domains..
For our projects, we have a few reseller accounts that have multiple Class C IP addresses and a few dozen individual hosting accounts: some with shared IPs, others with dedicated IPs. When we use subdomains, we don’t do more than 5 unless it’s all White Hat from that server.
If you are a beginner and want to test the waters to “prove the concept”, then start with a reseller account for $10-25 per month. But when you get to be a professional SEO Black Hat Spammer, pre-empt what the Search Engines next move will be and <cliché> don’t put all your eggs in one basket. </cliché>
Leave that mistake for those White Hat SEO “Experts”.
I believe search engines do more than just look at IP addresses of the links. IP addresses are assigned liberally, so it would be better to decide which IP addresses are on the same machine and compute a “host-machine-ratio” of a web site, which would be a determining factor in a web site’s likelihood to be spam.
This approach is not without its faults, as plenty of legitimate websites are hosted on shared machines with thousands of other websites. If you include in the heuristic information such as the DNS servers and DNS contact information, it becomes a much more functional. There are time constraints the search engines have to deal with in the processing, and many websites use the DNS servers of their domain registrar, which would result in identical DNS servers even without a relationship between the two websites.
If compared the outgoing links on the pages which linking to another and combined it with the host-to-mache and DNS records, you could significantly reduce the value of marketers links on related sites.