Currently at an office there is a SBS2003 with AD and Exchange. It has two NICS. One for the WAN and one for the LAN.
It is a DHCP server and its IP Address is 192.168.16.2
On the other NIC, it has a public, static IP which is the MX server for the domain.
Computers on the network use 192.168.16.2 as their default gateway to route through to the internet. All is working fine.
The client however has decided to have a CISCO Vpn box installed with a new SDSL Line. the Cisco PIX will now have the static public IP on the outside interface and its inside interface is set to 192.168.16.253. The DHCP server is not active.
My Question is, I'm about to attach the Cisco to the SBS2003...do I now only use one of the NICS on the SBS2003? Also, what changes will I have to make to the DNS and DHCP server so that the clients will continue being able to access the internet? Surely a default gateway of 192.168.16.2 will no longer work?
Anything else I should be wary about before I start doing this?
Thanks in advance...