I do not see many people here for discussion but I think it's where this thread belongs.
It's not a secret in the SEO industry in China, but only a few people know how, and those people are making decent $$$$ from this bug in Baidu spider.
Back to the point, I discovered last year that some Chinese websites have links from the homepage of Apple etc. This is hard to believe since those websites (in Chinese )center around a totally different field and are in fact crap. There's no way Apple would link to them.
When I did a cache:www.apple.com on baidu.com and I saw the anchor and url of those website, but when I opened up Apple's website, those links did not exist at all!
Later that year I learned from someone that there is a software that actually can fake any website you want and tricks Baidu spider into believing that website is the real Apple or Microsoft website. I do not know the name of the software but do see a screenshot.
So how could this be possible? I know there must be some vulnerabilities in Baidu spider but I can't figure out where.
P.S. I see someone saying that he has some similar software designed specifically for Google, which can take your keyword to the first spot in a few days although I have no idea if he's serious.
If this were a widely known flaw then it would likely be shut down very quickly.
If a tool like this did exist it would be very black-hat, and its existence would probably be a closely guarded secret. If the name of such a product were made public on a public forum like this then you'd see more abuse of this and the loophole would shortly be closed, erasing any value. So people who know about gaming a major search engine's spider aren't likely to post anything out in the public.
There are plenty of software and SEO claims that say they can get you to the top of any search engine. All of them that I have looked into are scams.
Depends if the SE checks rDNS for a valid domain, which I doubt.
If not, I would have thought it possible to redirect a close-match domain internally, possibly to a different IP, within a server to a locally defined forged domain such as apple, at least in some servers.
Remember there are always rogue DNS servers that will redirect to dummy sites.