Moxa DA-681A-I-DPP-T-LX [3/79] Table of contents

Table of Contents

1. Introduction ...................................................................................................................................... 1-1

Overview ........................................................................................................................................... 1-2

Product Features ................................................................................................................................ 1-2

Software Specifications ....................................................................................................................... 1-3

2. Software Configuration ..................................................................................................................... 2-1

Starting from a VGA Console ................................................................................................................ 2-2

Connecting from an SSH Console .......................................................................................................... 2-2

Windows Users ........................................................................................................................... 2-2

Linux Users ................................................................................................................................ 2-3

Inserting a USB Storage Device into the Computer ................................................................................. 2-6

Checking the Linux Version .................................................................................................................. 2-8

APT—Installing and Removing Packages ................................................................................................ 2-8

3. Managing Communications ............................................................................................................... 3-1

Changing the Network Settings ............................................................................................................ 3-2

Changing the “interfaces” Configuration File ................................................................................... 3-2

DNS Client ......................................................................................................................................... 3-3

/etc/hostname ............................................................................................................................ 3-3

/etc/resolv.conf ........................................................................................................................... 3-3

Observe and Erase Chain Rules ..................................................................................................... 3-7

Define Policy for Chain Rules ........................................................................................................ 3-8

Append or Delete Rules ................................................................................................................ 3-8

NAT (Network Address Translation) ....................................................................................................... 3-9

NAT Example .............................................................................................................................. 3-9

Enabling NAT at Bootup ............................................................................................................. 3-10

PPP (Point to Point Protocol) ............................................................................................................... 3-10

Connecting to a PPP Server over a Simple Dial-up Connection ......................................................... 3-11

Connecting to a PPP Server over a Hard-wired Link ....................................................................... 3-12

Checking the Connection ............................................................................................................ 3-12

Ethernet Bridging for Private Networks on the Same Subnet ........................................................... 3-21

Routed IP ................................................................................................................................. 3-22

4. Programmer’s Guide ......................................................................................................................... 4-1

Device API ......................................................................................................................................... 4-2

Getting the Product Serial Number ........................................................................................................ 4-2

RTC (Real Time Clock) ......................................................................................................................... 4-3

UART ................................................................................................................................................ 4-3

Introduction ............................................................................................................................... 4-3

Saving the System to the USB Drive ................................................................................................... 5-11

A. Software Components ....................................................................................................................... A-1