Service Gateway / Double Sided Firewall

[binky]

I need to link two Networks together over a private connection. Network A is my network and Network B is a private network with exchange and web services. I need to publish services from Network B to Network A and prevent the two networks from seeing each other (except for these services) any ideas?

[ChrisH]

Just a firewall and open up the relative ports with IP restriction. eg open allow traffic on port 25 through to IP blah blah. Or Am I missing something here?

[Ric_]

Or secure with a VPN if security is even more of an issue.

[binky]

Thanks