The Dial NAT

Welcome to the Dial NAT Configurator

Here you will find the information you will need to build a Dial NAT for home or business use. Included here is information on:

minimum hardware requirements,
actual PC setup,
creation of a custom configuration file for the NAT software.

Hardware Requirements

The minimum hardware requirement for a Dial NAT with a modem no faster than V.34 is a dedicated PC with:

386DX-40 or faster CPU (some cache will help a lot)
4MB of RAM or more
20MB of hard disk space or more
One floppy drive
Microsoft MS-DOS 6.22
One Ethernet card with a packet driver
Internal V.34 or V.32bis modem -or-
External V.34 or V.32bis modem with internal 16550A serial port
Generic display adaptor and monitor
Keyboard
A Watchdog Timer Board if you are building a high-reliability or unattended site.

The Right Model for You?

We assume that you have reviewed the Dial NAT Description before you got to this point. This NAT will connect a "Private" internal ethernet to the Internet via Demand Dial PPP. Your "Private" network is where your internal work stations and hosts are hidden.

PC Setup

When we build a Dial NAT, we do it this way. We recommend that you do the same if you can.

NAT Configuration Preparation

Finally the creation of the actual NAT configuration file "startup.htm." To do this, we need information from you, about your network environment.

Your Network

First of all, we assume that you are using ethernet, since the current model of the NAT doesn't support Token Ring or ARCNET. If this is true, please continue.

We need to know if you are already using IP on your internal network. If you are, you may wish to continue using the IP Addresses that you have assigned to your hosts and work stations. If you aren't using IP already, you will want to use IP Addresses that are set aside for users of NAT products. These addresses are listed in the Internet Standard RFC 1597, which we summarize for you. The important characteristic of these addresses is that they will never be assigned to anyone in the Internet, so you are free to use them yourself forever. With the NAT in place, nobody will know what addresses you are using inside your network.

So, which will it be?

I'm already using IP in my network and will keep the addresses I'm using.
-or-
I'm either not using IP yet, or I'm already using IP in my network and will switch to the RFC 1597 IP Addresses.

This page was last modified on January 15, 1998.

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