196 lines
3.5 KiB
HTML
196 lines
3.5 KiB
HTML
<HTML
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><HEAD
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><TITLE
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>Overview of the server system</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.52"><LINK
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REL="HOME"
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TITLE="Linux PPP HOWTO"
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HREF="index.html"><LINK
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REL="UP"
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TITLE="Setting up a PPP server"
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HREF="ppp-server.html"><LINK
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REL="PREVIOUS"
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TITLE="Setting up a PPP server"
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HREF="ppp-server.html"><LINK
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REL="NEXT"
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TITLE="Getting the software together"
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HREF="x1535.html"></HEAD
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><BODY
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CLASS="SECT1"
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BGCOLOR="#FFFFFF"
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TEXT="#000000"
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LINK="#0000FF"
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VLINK="#840084"
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ALINK="#0000FF"
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><DIV
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CLASS="NAVHEADER"
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><TABLE
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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><A
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HREF="http://www.linuxports.com/howto/ppp"
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TARGET="_top"
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>Linux PPP HOWTO</A
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></TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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VALIGN="bottom"
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><A
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HREF="ppp-server.html"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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>Chapter 28. Setting up a PPP server</TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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><A
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HREF="x1535.html"
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>Next</A
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></TD
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></TR
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></TABLE
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><HR
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><DIV
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CLASS="SECT1"
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><H1
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CLASS="SECT1"
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><A
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NAME="AEN1516"
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>28.2. Overview of the server system</A
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></H1
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><P
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>We offer dial up PPP (and SLIP) accounts and shell accounts using the
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same user name/password pair. This has the advantages (for us) that a
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user requires only one account and can use it for all types of
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connectivity. </P
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><P
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>As we are an educational organization, we do not charge our staff and
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students for access, and so do not have to worry about accounting and
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charging issues.</P
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><P
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>We operate a firewall between our site and the Internet, and this
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restricts some user access as the dial up lines are inside our
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(Internet) firewall (for fairly obvious reasons, details of our other
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internal fire walls are not presented here and are irrelevant in any
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case).</P
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><P
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>The process a user goes through to establish a PPP link to our site
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(once they have a valid account of course) is :-
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<P
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></P
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><UL
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><LI
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><P
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>Dial into our rotary dialer (this is a single phone number that
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connects to a bank of modems - the first free modem is then used).</P
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></LI
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><LI
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><P
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>Log in using a valid user name and password pair.</P
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></LI
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><LI
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><P
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>At the shell prompt, issue the command <TT
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CLASS="LITERAL"
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>ppp</TT
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> to start PPP on
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the server.</P
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></LI
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><LI
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><P
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>Start PPP on their PC (be it running Windows, DOS, Linux MAC OS or
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whatever - that is their problem).</P
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></LI
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></UL
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> </P
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><P
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>The server uses individual <TT
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CLASS="LITERAL"
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>/etc/ppp/options.ttyXX</TT
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> files for each
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dial in port that set the remote IP number for dynamic IP allocation.
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The server users proxyarp routing for the remote clients (set via the
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appropriate option to pppd). This obviates the need for routed or gated.</P
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><P
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>When the user hangs up at their end, pppd detects this and tells the modem
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to hang up, bringing down the PPP link at the same time.</P
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></DIV
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><DIV
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CLASS="NAVFOOTER"
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><HR
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ALIGN="LEFT"
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WIDTH="100%"><TABLE
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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><A
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HREF="ppp-server.html"
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>Prev</A
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></TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="index.html"
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>Home</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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><A
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HREF="x1535.html"
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>Next</A
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></TD
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></TR
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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>Setting up a PPP server</TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="ppp-server.html"
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>Up</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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>Getting the software together</TD
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></TR
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></TABLE
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></DIV
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></BODY
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></HTML
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> |