If you are making a PBN (Private Blog Network) , then you probably didn’t really want other webmasters to know where you get your backlinks. A large number of services are involved in backlink and keyword analysis, the most famous of which are Majestic, Ahrefs, Semrush. All of them have their own bots that can be blocked. One way is to write Disallow rules for these bots in the robots.txt file, but then this file will be visible to everyone, and this may turn out to be one of the footprints by which you can identify the website as a part of your PBN competitor backlink analysis.
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