New ADSL connection, how to set up interfaces ?

[Bod29]

Hi all,

I wondered if anyone could confirm that I'm on the right track here....

Scenario.
SB server running exchange, currently uses a modem dial up connection (Com1) to access internet and send and receive SMTP mail.

Task.
Install an ADSL connection and move all internet and email functions through that.

I'm fairly happy with the e-mail routing itself once the ADSL is available (with a single static public IP). It's just the physical side of things I'd like to check....

In my understanding, I will connect the ADSL router to the secondary NIC of the SB server which will be designated as the external interface in ISA server. This NIC will have the public IP address of the ADSL connection. The other NIC will have a private IP address on the LAN side network.

I would then get the MX record changed to point SMTP mail to the publicly available IP address which will send mail into the external interface of the ISA server, to be routed internally.

Does that make sense ?? (hope so ;-)

any comments appreciated !

thanks
Roddy