70 lines
3.0 KiB
HTML
70 lines
3.0 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
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<!--Converted with LaTeX2HTML 96.1-c (Feb 29, 1996) by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds -->
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<HTML>
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<HEAD>
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<TITLE>Configuring a PPP Server</TITLE>
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</HEAD>
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<BODY LANG="EN">
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<A HREF="node1.html"><IMG WIDTH=65 HEIGHT=24 ALIGN=BOTTOM ALT="contents" SRC="contents_motif.gif"></A> <BR>
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<B> Next:</B> <A HREF="node124.html">Various Network Applications</A>
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<B>Up:</B> <A HREF="node107.html">The Point-to-Point Protocol</A>
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<B> Previous:</B> <A HREF="node122.html">The PAP Secrets File</A>
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<BR> <P>
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<H1><A NAME="SECTION00101100000">Configuring a PPP Server</A></H1>
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<A NAME="4506"></A>
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Running pppd as a server is just a matter of adding the appropriate
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options to the command line. Ideally, you would create a special account,
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say ppp, and give it a script or program as login shell that invokes
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pppd with these options. For instance, you would add the following
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line to /etc/passwd:
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<Pre>
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ppp:*:500:200:Public PPP Account:/tmp:/etc/ppp/ppplogin
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</Pre>
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Of course, you may want to use different uids and gids than those shown
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above. You would also have to set the password for the above account
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using the passwd command.
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<P>
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The ppplogin script might then look like this:
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<Pre>
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#!/bin/sh
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# ppplogin - script to fire up pppd on login
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mesg n
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stty -echo
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exec pppd -detach silent modem crtscts
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</pre>
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The mesg command disables other users to write to the tty
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using, for instance, the write command. The stty command
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turns off character echoing. The is necessary, because otherwise
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everything the peer sends would be echoed back to it. The most
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important pppd option given above is -detach, because
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it prevents pppd drom detaching from the controlling tty. If
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we didn't specify this option, it would go to the background, making
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the shell script exit. This would in turn would cause the serial line
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to be hung up and the connection to be dropped. The silent
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option causes pppd to wait until it receives a packet from the
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calling system before it starts sending. This prevents transmit
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timeouts to occur when the calling system is slow in firing up its PPP
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client. The modem makes pppd watch the DTR line to
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see if the peer has dropped the connection, and crtscts turns
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on hardware handshake.
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<P>
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Beside these options, you might want to force some sort of authentication,
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for example by specifying auth on pppd's command line, or
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in the global options file. The manual page also discusses more specific
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options for turning individual authentication protocols on and off.
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<A NAME="4553"></A>
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<A NAME="4531"></A>
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<A NAME="4532"></A>
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<P>
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<HR><A HREF="node1.html"><IMG WIDTH=65 HEIGHT=24 ALIGN=BOTTOM ALT="contents" SRC="contents_motif.gif"></A> <BR>
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<B> Next:</B> <A HREF="node124.html">Various Network Applications</A>
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<B>Up:</B> <A HREF="node107.html">The Point-to-Point Protocol</A>
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<B> Previous:</B> <A HREF="node122.html">The PAP Secrets File</A>
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<P><ADDRESS>
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<I>Andrew Anderson <BR>
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Thu Mar 7 23:22:06 EST 1996</I>
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</ADDRESS>
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</BODY>
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</HTML>
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