For SEO purposes, I want to have different DNS for each domain, I need to purchase 2 IP's for each domain to work? There is no other way? Or if I just use 1 SAME IP for 2 ns1/ns2.mydomain.com? The domain might not work all the time? How do You guys do it on VPS Servers? I don't want to be paying for 2 IP's just to register ns1 and ns2 just to have different DNS domain.