I wish to convert the present LAN setup and connect it to the net using only one public IP. This is since we are switching to an ISP that can provide us with only one public IP ( which will be used for our mail, web and DNS server). Previously we had 8. I feel there's a lot of reading I have to do to implement it.
I've heard that IP MASQ/Chains can be used to connect a LAN to the Internet using only one public IP. Are there beginners level, or step by step documents that I can read on this? This is all new to me =).