Internet Acces

Dear All,

In my company, there are two domains(separately). One domain connected to the internet. But the other domain wants to join this connection. I don’t know how to connected the second domain. Because the IP address is different each other.
Domain A using 222.200.X.X and Domain B using 145.47.X.X. For information, Domain B is not child domain of Domain A. Could anybody help me? Please? Thankyou verumuch.