Linux PPP HOWTO

• Index
• About This Document
• How can I help?
• Introduction
• Differences between Linux distributions
• PPP configuration tools
• IP Numbers
• Aims of this Document
• Linking two LANs or a LAN to the Internet using PPP
• Using intuitive configuration tools to set up PPP
• Setting up a PPP server
• Using PPP over a direct null modem connection
• This document at present does NOT cover...
• Software versions covered
• Other Useful/Important Documents
• Easy Configuration Utilities for PPP
• WvDial - A command-line pppd driver
• rp3 - RedHat PPP dialer
• Linuxconf - Universal (almost) Linux PPP dialer
• Debugging
• My modem connects but ppp never starts up
• The syslog says "serial line is not 8 bit clean"
• Default route not set
• Other Problems
• Overview of what has to be done to get PPP working as a client
• Compiling PPP support into the kernel
• Obtaining information from your ISP
• Configuring your modem and serial port
• Setting up Name to Address Resolution (DNS)
• PPP and root Privileges
• Checking your distribution PPP Files and setting up the PPP Options
• If your PPP server uses PAP (Password Authentication Protocol)
• Connecting to the PPP server by hand
• Automating your PPP Connection
• Shutting down the link
• If you have problems
• After the link comes up
• Problems with standard IP services on a Dynamic IP number PPP link
• Maintaining a permanent connection to the net with pppd.
• Configuring your Linux Kernel
• Knowing your hardware
• Kernel compilation - the Linux 1.2.13 kernel
• Kernel compilation - the Linux 1.3.x, 2.0.x, and 2.2.x kernels
• Note on PPP-2.x and /proc/net/dev
• General kernel config considerations for PPP
• Getting the Information you need about the PPP server
• Configuring your modem and serial port
• Serial Port Names
• Configuring your modem
• Note on Serial Flow Control
• Testing your modem for dial out
• Setting up Name to Address Resolution (DNS)
• The /etc/host.conf file
• Using PPP and root privileges
• Setting up the PPP connection files
• What options should I use? (No PAP/CHAP)
• Other options to consider adding
• If your PPP server uses PAP (Password Authentication Protocol)
• The PAP/CHAP secrets file
• The PAP secrets file
• The CHAP secrets file
• Handling multiple PAP-authenticated connections
• Setting up the PPP connection manually
• Automating your connections - Creating the connection scripts
• The ppp-on script
• Editing the supplied PPP startup scripts
• What a Chat script means...
• A chat script for PAP/CHAP authenticated connections
• The pppd debug and file option_file options
• Testing your connection script
• Shutting down the PPP link
• Getting Help when totally stuck
• Common Problems once the link is working
• I can send email, but not receive it
• Why can't people finger, WWW, gopher, talk, etc. to my machine?
• Using Internet services with Dynamic IP numbers
• Setting Up a local Name server
• Linking two networks using PPP
• Setting up the routing
• Network security
• After the link comes up - the /etc/ppp/ip-up script
• Handling email queues
• A sample /etc/ppp/ip-up script
• Handling email
• Using /etc/ppp/ip-down
• Routing issues on a LAN
• Setting up a PPP server
• Overview of the server system
• Getting the software together
• Setting up standard (shell access) dialup.
• Setting up the PPP options files
• Setting pppd up to allow users to (successfully) run it
• Setting up the global alias for pppd
• Using PPP across a null modem (direct serial) connection
• PPPoE or PPP over Ethernet