User`s manual

3
3. Managing Communications
The TC-6110-LX ready-to-run embedded computer is a network-centric platform designed to serve as a
front-end for data acquisition and industrial control applications. This chapter describes how to configure the
various communication functions supported by the Linux operating system.
The following topics are covered in this chapter:

Configuring Network Interfaces
 Configuring a Persistent Network Interface
Naming Order
 Ethernet Interface Configuration
 Adjusting IP Addresses with ifconfig

Point-to-Point Over Ethernet (PPPoE)
Configuration
 The Easy Way: pppoeconf
 The Difficult Way (Manually)

Configuring a Point-to-Point Connection

Connecting to a PPP Server over a Hardwired
Link
 Checking the Connection
 Setting up a Machine for Incoming PPP
Connections

Telnet/FTP/TFTP Server
 Enabling a Telnet, FTP, or TFTP Server
 Disabling a Telnet/FTP/TFTP Server

DNS Utilities
 Configuring the OS Hostname
 Configuring the DNS Resolver
 Configuring the Name Service Switcher

Apache Web Server
 Default Homepage
 Configuring the Common Gateway Interface
(CGI)
 Saving Web Pages to a USB Storage Device

Netfilter/iptables
 IP Tables and IP Chains
 Understanding Basic Traffic Flows
 Connection Tracking
 Policies: Setting Default Firewall Behavior
 Viewing and Manipulating Rulesets
 Writing Rulechains
 Saving the Firewall
 NAT (Network Address Translation)

Setting up a Networked File System: NFS

Setting Up a VPN

Setting Up Hot Swap for Block Storage
 File Overview
 Hot Swap Daemon Customization
 Handling an Event with mxhtspd: Moxa
Hot-Swap Daemon
 Setting Up Hot Swap Daemon Logging
 A Sample mxhtspd Setup

Setting Up GPS

Retrieving GPS Data