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Linux PPP HOWTO

Robert Hart, hartr@hedland.edu.au

v2.2, 25 August 1996


This document shows how to connect your Linux PC to a PPP server, how to use PPP to link two LANs together and provides one method of setting up your Linux computer as a PPP server.

Copyright

The copyright of this document is retained by the author. Permission is granted to distribute the document by electronic means and on CDs provided that it is kept entirely in its original format. Permission is also granted to print a copy of this document for personal use.

The republishing of this document in part or in whole without the permission of the copyright holder by any means other than as noted above is prohibited.

Distribution

This document will be posted to comp.os.linux.answers as new versions of the document are produced.It is also available in HTML format at:-

Other formats (SGML, ASCII, postscript, DVI) are available from Howtos - other formats

As sunsite.unc.edu carries a very heavy load, please use an appropriate mirror site closest to you.

Acknowledgements

A growing number of people have provided me with assistance in preparing this document. Special thanks go to Al Longyear for the guidance on PPP itself (if there are mistakes here, they are mine not his), Greg Hankins (maintainer of the Linux Howto system) and Daniel Berinson for assistance with the linuxdoc-sgml package when it started to choke on my text (3 days before a publication dead line, no less!) and Debi Tackett (of MaximumAccess.com) for many helpful suggestions on style, content order, logic and clarity of explanations.

Finally, to the many people who have contacted me by email offering comments - my thanks. As with all HOWTO authors, the satisfaction of helping is all the payment we receive and it is enough. By writing this HOWTO I am repaying in a small way the debt I - and all other Linux users - owe to the people who write and maintain our OS of choice.

1. Introduction

2. IP Numbers

3. Aim of this Document

4. Software versions covered

5. Other Useful/Important Documents

6. Configuring your Linux Kernel

7. Getting the Information you need about the PPP service

8. A note about serial ports and speed capabilities

9. Configuring your modem

10. Using PPP and root privileges

11. Setting up the PPP connection files

12. Setting up your /etc/resolv.conf file

13. The PAP/CHAP secrets file

14. Setting up the PPP connection manually

15. Automating your connections - Creating the connection scripts

16. Testing your connection script

17. Shutting down the PPP link

18. Debugging

19. Linking two networks using PPP

20. After the link comes up...

21. Shutting down the link

22. Routing issues on a LAN

23. Getting Help when totally stuck

24. Common Problems once the link is working

25. Using Internet services with Dynamic IP numbers

26. Setting up a PPP server

27. Using PPP across a null modem (direct serial) connection


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