SSAS Deployment to Public Internet

Greetings

I need help with cube security .I am atrying to deploy a cube onto Public Internet .

Currently our datawarehouse is Residing on Domain .And we want to deploy the cube onto Internet where people can look at it  .

Server 1 :This is on Domain and hosts datwarehouse
Server 2 :This is accessible to Public and is on internet.this is where we are trying to deploy the cube

I am trying to deploy the cube from Server 1 to Server 2 so people can connect and browse the cube

When i try to deploy the cube i get an error stating login time out expired.

In the data source of the cube this is what i got .

Connected to database as Sql Server Account (Lets Say X and this has read permissions on dataware house
and impersonation information is set to windows account of mine (Domain\y)

And i am able to connect to ssas instance of server 2 from server 1 ssms using my windows account .(Domain\y)

Can any one let me know what is the best way to approach this