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<H2><A NAME="Einleitung"></A> <A NAME="s1">1.</A> <A HREF="EN-i4l.html#toc1">Introduction</A> </H2>
<P>This tutorial is for ISDN beginners and for those with some
experience who are now also interested in further configuration of
the entire system (e.g. mail, firewalls, etc.).</P>
<P>The tutorial is designed to be practical. All details and features are
not described; rather the goal is to be able to configure such a system. </P>
<P>This tutorial is based on the S.u.S.E. Linux 5.2 distribution (see
<A HREF="http://www.suse.de/">http://www.suse.de/</A>). Of course other distributions
(Debian, RedHat, ...) can be used as well. The necessary scripts will
be installed as needed. See
<A HREF="EN-i4l-13.html#installation">Installation</A>.</P>
<P>The S.u.S.E distribution contains both configuration scripts and the
tools for manual configuration. In this tutorial, the <I>simple</I>
method using the scripts are explained first, then the manual
configuration is explained for reference.</P>
<H2><A NAME="Voraussetzungen"></A> <A NAME="ss1.1">1.1</A> <A HREF="EN-i4l.html#toc1.1">Requirements </A>
</H2>
<P>Basic knowledge of Linux is required. A base system should already
have been successfuly installed.</P>
<P>In addition, a supported ISDN card should be installed. Recommended
are, for example, the AVM Fritz Classic or the ELSA QS1000. See
<A HREF="http://www.suse.de/Support/sdb_e/isdn.html">http://www.suse.de/Support/sdb_e/isdn.html</A> for a list of
supported cards.</P>
<H2><A NAME="Was soll erreicht werden?"></A> <A NAME="ss1.2">1.2</A> <A HREF="EN-i4l.html#toc1.2">Goal of this tutorial.</A>
</H2>
<P>A Linux computer should become a Internet Access Computer. The
computer dials out automatically to the Internet Service Provider
(ISP) and establishes a transparent network connect. Users of this
computer have full access to the Internet and can uses services such
as WWW and FTP. The mail system is set up so that mail is exchanged
automatically upon connection.</P>
<P>A separate section describes the connection of a local network with
full Internet access (mawquarading, mail, WWW, FTP) and the special
problems involved.</P>
<P>Since this scenario involves a dial-up line, special attention is paid
to keeping the telephone costs as low as possible while maintaining
full Internet access.</P>
<P>To keep things simple, we'll make the following assumptions that apply
to most private users (or small companies that have only one
<I>private</I> Internet access):</P>
<P>
<UL>
<LI> Dial-up ISDN line without a PBX (Euro ISDN)</LI>
<LI> Protocol: syncPPP with dynamic IP numbers</LI>
<LI> No requirement to use the ISP's proxy</LI>
<LI> Mail can be sent via SMTP and received via POP3
</LI>
</UL>
</P>
<P>These assumptions appply to most private access providers, such as
T-Online in Germany or Personal Eunet as well as smaller providers.</P>
<P>In addition, we'll discuss security questions, problems with dynamic
IP numbers, and the connection of a LAN to the Internet Access
Computer.</P>
<H2><A NAME="ss1.3">1.3</A> <A HREF="EN-i4l.html#toc1.3">What must I read, what should I read?</A>
</H2>
<P>This text is quite long because special problems and troubleshooting
tips are discussed in several places. If these problems don't apply to
you, you can skip them (although reading them won't hurt).</P>
<P>Similarly, there are several basic topics (for example, routing or
mail exchange) that aren't directly related to isdn4linux and won't be
new to the experienced reader. However, understanding these topics is
necessary and experience has shown that in practice, these topics
cause the most problems.</P>
<H3>In which order should I read? </H3>
<P>FixMe</P>
<H2><A NAME="ss1.4">1.4</A> <A HREF="EN-i4l.html#toc1.4">No guarantee</A>
</H2>
<P>This text has been written and translated to the best of our knowledge.
The authors make no guarantee that the methods described here are correct,
work, are secure, or that they do not make any unnecessary connections.</P>
<P>However, our goal for the reader is to be able to handle exactly these
problems for a simple system :-)</P>
<H2><A NAME="ss1.5">1.5</A> <A HREF="EN-i4l.html#toc1.5">Feedback</A>
</H2>
<P>Is wanted!</P>
<P>Via E-Mail to:
<A HREF="mailto:i4l@klaus.franken.de">i4l@klaus.franken.de</A></P>
<H2><A NAME="ss1.6">1.6</A> <A HREF="EN-i4l.html#toc1.6">Copyright</A>
</H2>
<P>This document is copyrighted by Klaus Franken and Scott Hanson.</P>
<P>This docoment may be distributed in accordance with the GNU General
Public License. In particular, this means that the text may be
distributed either electronically or physically without the payment of
license fees, as long as this copyright is not removed. Commercial
distribution is allowed and encouraged. The Linux HOWTO Project should
be should be informed of any paper publication.</P>
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