AX.25

This is based on Jeff Tranter (VE3ICH)'s good but somewhat dated Linux Amateur Radio AX.25 HOWTO.

• Introduction

• • Changes from the previous version
  • Where to obtain new versions of this document
  • Other related documentation

• . The Packet Radio Protocols and Linux

• • How it all fits together

• . The AX.25/NET/ROM/ROSE software components

• • Finding the kernel, tools and utility packages

• . Installing the AX.25/NET/ROM/ROSE software

• • Compiling the kernel
  • The AX.25 library, tools, and application programs

• . A note on callsigns, addresses and things before we start

• • What are all those T1, T2, N2 and things ?
  • Run time configurable parameters

• . Configuring an AX.25 port

• • Creating the AX.25 network device
  • Creating the /etc/ax25/axports file
  • Configuring AX.25 routing

• . Configuring an AX.25 interface for TCP/IP
• . Configuring a NET/ROM port

• • Configuring /etc/ax25/nrports
  • Configuring /etc/ax25/nrbroadcast
  • Creating the NET/ROM Network device
  • Starting the NET/ROM daemon
  • Configuring NET/ROM routing.

• . Configuring a NET/ROM interface for TCP/IP
• . Configuring a ROSE port

• • Configuring /etc/ax25/rsports
  • Creating the ROSE Network device
  • Configuring ROSE Routing

• Making AX.25/NET/ROM/ROSE calls
• Configuring Linux to accept Packet connections

• • Creating the /etc/ax25/ax25d.conf file
  • A simple example ax25d.conf file
  • Starting ax25d

• Configuring the node software

• • Creating the /etc/ax25/node.conf file
  • Creating the /etc/ax25/node.perms file
  • Configuring node to run from ax25d
  • Configuring node to run from inetd

• Configuring axspawn

• • Creating the /etc/ax25/axspawn.conf file

• Configuring the pms

• • Create the /etc/ax25/pms.motd file
  • Create the /etc/ax25/pms.info file
  • Associate AX.25 callsigns with system users
  • Add the PMS to the /etc/ax25/ax25d.conf file
  • Test the PMS

• Configuring the user_call programs
• Configuring the ROSE Uplink and Downlink commands

• • Configuring a ROSE downlink
  • Configuring a ROSE uplink
• Associating AX.25 callsigns with Linux users
• Configuring APRS
• The /proc/ file system entries
• AX.25, NET/ROM, ROSE network programming

• • The address families
  • The header files
  • Callsign mangling and examples

• Some sample configurations

• • Small Ethernet LAN with Linux as a router to Radio LAN
  • IPIP encapsulated gateway configuration
  • AXIP encapsulated gateway configuration
  • Linking NOS and Linux using a pipe device

• Summary of AX.25-related Linux commands
• Where do I find more information about .... ?
  • Packet Radio
  • Protocol Documentation
  • Hardware Documentation
  • Linux Ham Radio Software

• Discussion relating to Amateur Radio and Linux
• Acknowledgements
• Feedback
• Distribution Policy