Moxa Technologies W311, W321, W341

Chapter 4 Managing Communications

In this chapter, we explain how to configure the W311/321/341’s various communication

functions.

The following topics are covered in this chapter:

 Telnet / FTP

 DNS

 Web Service—Apache

 Installing PHP for Apache Web Service

 IPTABLES

 NAT

¾ NAT Example

¾ Enabling NAT at Bootup

 Dial-up Service—PPP

 PPPoE

 NFS (Network File System)

¾ Setting up the W311/321/341 as an NFS Client

 Mail

 SNMP

 OpenVPN

Contents

Main ThinkCore W311/321/341 Linux Users Manual www.moxa.com/product ThinkCore W311/321/341 Linux Users Manual Copyright Notice Trademarks Table of Contents Page Page Page ThinkCore W311/321/341 Linux Users Manual Introduction Overview Software Architecture ThinkCore W311/321/341 Linux Users Manual Introduction Journaling Flash File System (JFFS2) ThinkCore W311/321/341 Linux Users Manual Introduction Software Package Page ThinkCore W311/321/341 Linux Users Manual Getting Started 2-2 Powering on the W311/321/341 Connecting the W311/321/341 to a PC Serial Console ThinkCore W311/321/341 Linux Users Manual Getting Started 2-3 Telnet Console ThinkCore W311/321/341 Linux Users Manual Getting Started 2-4 SSH Console Windows Users ThinkCore W311/321/341 Linux Users Manual Getting Started 2-5 Configuring the Ethernet Interface Modifying Network Settings with the Serial Console ThinkCore W311/321/341 Linux Users Manual Getting Started 2-6 Modifying Network Settings over the Network Configuring the WLAN IEEE802.11a/b/g ThinkCore W311/321/341 Linux Users Manual Getting Started 2-7 ThinkCore W311/321/341 Linux Users Manual Getting Started 2-8 ThinkCore W311/321/341 Linux Users Manual Getting Started 2-9 ThinkCore W311/321/341 Linux Users Manual Getting Started 2-10 ThinkCore W311/321/341 Linux Users Manual Getting Started 2-11 Using WPA_SUPPLICANT to Support WPA and WPA2 SD Slot and USB for Storage Expansion ThinkCore W311/321/341 Linux Users Manual Getting Started 2-12 ThinkCore W311/321/341 Linux Users Manual Getting Started 2-13 Test ProgramDeveloping Hello.c Installing the Tool Chain (Linux) Checking the Flash Memory Space ThinkCore W311/321/341 Linux Users Manual Getting Started 2-14 Compiling Hello.c detratS gnitteG launaM sresU xuniL 143/123/113W eroCknihT 2-15 Uploading and Running the Hello Program Developing Your First Application Testing Environment ThinkCore W311/321/341 Linux Users Manual Getting Started 2-17 Compiling tcps2.c detratS gnitteG launaM sresU xuniL 143/123/113W eroCknihT 2-18 Uploading and Running the tcps2-release Program 3. From the W311/321/341, type: ThinkCore W311/321/341 Linux Users Manual Getting Started #ps ef command for job number 1 to terminate this program: 4. The program should start running in the background. Use the Testing Procedure Summary RS-232 LAN Read serial data Send data to PC2 Write data to PC1 Receive LAN data tcps2.c Page ThinkCore W311/321/341 Linux Users Manual Managing Embedded Linux 3-2 System Version Information System Image Backup Upgrading the Firmware ThinkCore W311/321/341 Linux Users Manual Managing Embedded Linux 3-3 command to list the size of each memory block and how much free space is available in each block. 3-4 3. Next, use the upfirm command to upgrade the kernel and root file system: ThinkCore W311/321/341 Linux Users Manual Managing Embedded Linux 3-5 Loading Factory Defaults Backing Up the User Directory 3-6 Deploying the User Directory to Additional W311/321/341 Units Enabling and Disabling Daemons 3-7 Type the command ps ef to list all processes currently running. To run a private daemon, you can edit the file rc.local, as follows: 3-8 The enabled daemons will be available after you reboot the system. Setting the Run-Level as an example. 3-9 Adjusting the System Time Setting the Time Manually 3-10 NTP Client Updating the Time Automatically 3-11 CronDaemon to Execute Scheduled Commands Page ThinkCore W311/321/341 Linux Users Manual Managing Communications 4-2 Telnet / FTP DNS Web ServiceApache ThinkCore W311/321/341 Linux Users Manual Managing Communications 4-3 ThinkCore W311/321/341 Linux Users Manual Managing Communications 4-4 Installing PHP for Apache Web Server 4-5 Step 2: Type upramdisk to get the free space ram disk to save the package. Step 4: uhtar the package. To do this, type the command tar xvzf php.tar.gz ThinkCore W311/321/341 Linux Users Manual Managing Communications 4-6 ThinkCore W311/321/341 Linux Users Manual Managing Communications 4-7 IPTABLES ThinkCore W311/321/341 Linux Users Manual Managing Communications 4-8 ThinkCore W311/321/341 Linux Users Manual Managing Communications 4-9 Observe and erase chain rules 4-10 Define policy for chain rules Append or delete rules: 4-11 NAT NAT Example NAT Area / Private IP 4-12 Enabling NAT at Bootup Dial-up ServicePPP Example 1: Connecting to a PPP server over a simple dial-up connection 4-13 4-14 Example 2: Connecting to a PPP server over a hard-wired link How to check the connection ThinkCore W311/321/341 Linux Users Manual Managing Communications 4-15 PPPoE ThinkCore W311/321/341 Linux Users Manual Managing Communications 4-16 ThinkCore W311/321/341 Linux Users Manual Managing Communications 4-17 NFS (Network File System) ThinkCore W311/321/341 Linux Users Manual Managing Communications 4-18 Setting up the W311/321/341 as an NFS Client Mail SNMP ThinkCore W311/321/341 Linux Users Manual Managing Communications 4-19 ThinkCore W311/321/341 Linux Users Manual Managing Communications 4-20 ThinkCore W311/321/341 Linux Users Manual Managing Communications 4-21 ThinkCore W311/321/341 Linux Users Manual Managing Communications 4-22 ThinkCore W311/321/341 Linux Users Manual Managing Communications 4-23 ThinkCore W311/321/341 Linux Users Manual Managing Communications 4-24 ThinkCore W311/321/341 Linux Users Manual Managing Communications 4-25 ThinkCore W311/321/341 Linux Users Manual Managing Communications 4-26 ThinkCore W311/321/341 Linux Users Manual Managing Communications 4-27 OpenVPN Setup 1: Ethernet Bridging for Private Networks on Different Subnets ThinkCore W311/321/341 Linux Users Manual Managing Communications 4-28 ThinkCore W311/321/341 Linux Users Manual Managing Communications 4-29 ThinkCore W311/321/341 Linux Users Manual Managing Communications 4-30 Create link symbols to enable this script at boot time: 4. Start both of OpenVPN peers, ThinkCore W311/321/341 Linux Users Manual Managing Communications Setup 2: Ethernet Bridging for Private Networks on the Same Subnet ThinkCore W311/321/341 Linux Users Manual Managing Communications 4-32 Setup 3: Routed IP 1. Set up four machines as shown in the following diagram: ThinkCore W311/321/341 Linux Users Manual Managing Communications 4-33 Development 5-2 Linux Tool Chain Steps for Installing the Linux Tool Chain Compilation for Applications 5-3 On-Line Debugging with GDB 5-4 Windows Tool Chain System Requirements for Windows Tool Chain Steps for Installing Windows T ool Chain 5-5 5-6 5-7 5-8 5-9 Using the BASH Shell 5-10 Compilation for Applications 5-11 After that, use FTP to upload the executable file to the UC, and then run the executable. 5-12 On-Line Debugging with Insight Page ThinkCore W311/321/341 Linux Users Manual Programmers Guide 6-2 Flash Memory Map Device API RTC (Real Time Clock) ThinkCore W311/321/341 Linux Users Manual Programmers Guide 6-3 Buzzer WDT (Watch Dog Timer) ThinkCore W311/321/341 Linux Users Manual Programmers Guide 6-4 ThinkCore W311/321/341 Linux Users Manual Programmers Guide 6-5 ThinkCore W311/321/341 Linux Users Manual Programmers Guide 6-6 The makefile is shown below: Example 2: ThinkCore W311/321/341 Linux Users Manual Programmers Guide UART Example to set the baudrate Example to get the baudrate ThinkCore W311/321/341 Linux Users Manual Programmers Guide 6-8 DO Page Page ThinkCore W311/321/341 Linux Users Manual UC Finder 8-2 Windows UC Finder Installing the Software ThinkCore W311/321/341 Linux Users Manual UC Finder 8-3 Broadcast Search ThinkCore W311/321/341 Linux Users Manual UC Finder 8-4 Linux ucfinder A A busybox (V0.60.4): Linux normal command utility collection File manager Process Other MOXA special utilities Page ThinkCore W311/321/341 Linux Users Manual Service Information B-2 MOXA Internet Services Problem Report Form MOXA ThinkCore W311/321/341 Product Return Procedure