I am using some dedicated server with lots of different IPs. Some domains are put on different IPs.
However, anyone can see that
domaina.com is pointed to
How to prevent that?
Users, google and other major search engines are able to detect finger prints from a variety of methods. Simply adding a dedicated IP is not enough, especially if the IP is provided by the same IP block chain.
To reduce the finger prints your site must use the following:
It should also be noted that users and machines can access history and caching servers that will reveal previous used values and settings. So simply changing the changing a site after it has been cached, indexed and so forth might be a worthless task because people can access the previous information, for example:
As @Simon_Hayer notes, there's no good way to prevent this entirely. However, if it's just a nameserver thing, you could create a new nameserver, ns.domaina.com (with the same IP address as ns1.myserver.com) and use that as domaina.com's nameserver. Again, this might not solve the main problem, but it will at least solve the "nameserver problem" you describe.