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update intro to ppp
git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@1144 af4574ff-66df-0310-9fd7-8a98e5e911e0
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Larry Lawrence
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@ -2,10 +2,10 @@
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<?dbhtml filename="connect.html" dir="connect"?>
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<title>Connecting to a Network</title>
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<partintro><para>The LFS book covers setting up networking with a static
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IP. There are however, other methods which are used to connect to networks and
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importantly the internet. We cover the most popular methods in this
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chapter.</para></partintro>
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<partintro><para>The <acronym>LFS</acronym> book covers setting up networking
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with a static <acronym>IP</acronym>. There are however, other methods which
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are used to connect to networks and importantly the internet. We cover the
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most popular methods in this chapter.</para></partintro>
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&connect-dialup;
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&connect-dhcp;
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@ -1,6 +1,6 @@
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<sect1 id="dhcpclient" xreflabel="Configuring the LFS bootscripts to support DHCP clients">
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<?dbhtml filename="configdhcp.html" dir="connect"?>
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<title>Configuring the LFS bootscripts to support DHCP clients</title>
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<title>Configuring the <acronym>LFS</acronym> bootscripts to support <acronym>DHCP</acronym> clients</title>
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<sect2><title>Config files</title>
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<para><filename>/etc/sysconfig/network</filename>,
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@ -12,33 +12,36 @@
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<sect2><title>Configuration Information</title>
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<para>Note that on this and the following pages, we
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use <userinput>eth0</userinput> as the example interface.
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use <emphasis role="strong">eth0</emphasis> as the example interface.
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If you want to configure a different (or more than one) interface, simply
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replace <userinput>eth0</userinput> with the interface you wish to use.</para>
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replace <emphasis role="strong">eth0</emphasis> with the interface you wish to
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use.</para>
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<para>These instructions will convert the configuration files from LFS
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(a static configuration) to a configuration using the DHCP protocol.
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Note that static and DHCP-based interfaces can co-exist on a LFS system. To
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do this, you should only make the alterations to those interfaces which
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need to support DHCP. All of the instructions on this page are applicable
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no matter which DHCP client you intend to use.</para>
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<para>These instructions will convert the configuration files from
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<acronym>LFS</acronym> (a static configuration) to a configuration using the
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<acronym>DHCP</acronym> protocol. Note that static and
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<acronym>DHCP</acronym>-based interfaces can co-exist on a
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<acronym>LFS</acronym> system. To do this, you should only make the
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alterations to those interfaces which need to support
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<acronym>DHCP</acronym>. All of the instructions on this page are applicable
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no matter which <acronym>DHCP</acronym> client you intend to use.</para>
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<para>If the interface you intend to use as your default gateway is going to
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use DHCP, the first step is to remove the <envar>GATEWAY</envar> and
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<envar>GATEWAY_IF</envar> variables
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use <acronym>DHCP</acronym>, the first step is to remove the <envar>GATEWAY
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</envar> and <envar>GATEWAY_IF</envar> variables
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from <filename>/etc/sysconfig/network</filename>. This will only need to be
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done once.</para>
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<para><screen><userinput>cd /etc/sysconfig &&
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<screen><userinput><command>cd /etc/sysconfig &&
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cp network network.bak &&
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sed "s/GATEWAY/# GATEWAY/" network.bak > network</userinput></screen></para>
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sed "s/GATEWAY/# GATEWAY/" network.bak > network</command></userinput></screen>
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<para>You then need to create scripts which will override the default
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network scripts and provide DHCP support. These two scripts are generic and
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so for use with both DHCP clients. First, the
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<filename>ifup-eth0</filename> script:</para>
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network scripts and provide <acronym>DHCP</acronym> support. These two scripts
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are generic and so for use with both <acronym>DHCP</acronym> clients. First,
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the <filename>ifup-eth0</filename> script:</para>
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<para><screen><userinput>cat > /etc/sysconfig/network-devices/ifup-eth0 << "EOF" </userinput>
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<screen><userinput><command>cat > /etc/sysconfig/network-devices/ifup-eth0 << "EOF" </command>
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#!/bin/sh
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source /etc/sysconfig/rc || exit
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@ -48,11 +51,11 @@ source $network_devices/ifconfig.eth0 || exit
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echo "Bringing up the eth0 interface..."
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modprobe eth0
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loadproc $DHCP_PROG $DHCP_START
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<userinput>EOF</userinput></screen></para>
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<command>EOF</command></userinput></screen>
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<para>Then the <filename>ifdown-eth0</filename> script:</para>
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<para><screen><userinput>cat > /etc/sysconfig/network-devices/ifdown-eth0 << "EOF" </userinput>
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<screen><userinput><command>cat > /etc/sysconfig/network-devices/ifdown-eth0 << "EOF" </command>
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#!/bin/sh
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source /etc/sysconfig/rc || exit
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@ -62,12 +65,12 @@ source $network_devices/ifconfig.eth0 || exit
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echo "Bringing down the eth0 interface..."
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$DHCP_PROG $DHCP_STOP
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evaluate_retval
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<userinput>EOF</userinput></screen></para>
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<command>EOF</command></userinput></screen>
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<para>Finally, we need to make these scripts executable:</para>
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<para><screen><userinput>chmod 755 /etc/sysconfig/network-devices/ifup-eth0 &&
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chmod 755 /etc/sysconfig/network-devices/ifdown-eth0</userinput></screen></para>
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<screen><userinput><command>chmod 755 /etc/sysconfig/network-devices/ifup-eth0 &&
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chmod 755 /etc/sysconfig/network-devices/ifdown-eth0</command></userinput></screen>
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</sect2>
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@ -2,19 +2,20 @@
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<?dbhtml filename="dhcpclient.html" dir="connect"?>
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<title>dhcp-&dhcp-version;</title>
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<para>The dhcp package comes with both a client (called dhclient) and a
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server program for using DHCP. If you want to install this package,
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<para>The <application>dhcp</application> package comes with both a client
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(called <command>dhclient</command>) and a server program for using
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<acronym>DHCP</acronym>. If you want to install this package,
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the instructions can be found at <xref linkend="dhcp"/>.
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Note that if you only want to use the client, you
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do <emphasis>not</emphasis> need to run the server and so do not need
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the startup script and links provided for the server daemon.
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You only need to run the DHCP server if you're providing this
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service to a network, and it's likely that you'll know if that's the
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You only need to run the <acronym>DHCP</acronym> server if you're providing
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this service to a network, and it's likely that you'll know if that's the
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case; if it isn't, don't run the server! Once you have installed the
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package, return here for information on how to configure the client
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(dhclient).</para>
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(<command>dhclient</command>).</para>
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<para>To configure dhclient, you need to create two files,
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<para>To configure <command>dhclient</command>, you need to create two files,
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<filename>/etc/sysconfig/network-devices/ifconfig.eth0</filename> and
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<filename>/etc/dhclient.conf</filename>.</para>
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@ -22,22 +23,22 @@ package, return here for information on how to configure the client
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file with the following commands (note that this will overwrite any
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existing file):</para>
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<para><screen><userinput>cd /etc/sysconfig/network-devices &&
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cat > /etc/sysconfig/network-devices/ifconfig.eth0 << "EOF"</userinput>
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<screen><userinput><command>cd /etc/sysconfig/network-devices &&
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cat > /etc/sysconfig/network-devices/ifconfig.eth0 << "EOF"</command>
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ONBOOT=yes
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DHCP_PROG=/sbin/dhclient
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DHCP_START=<appropriate start parameters>
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DHCP_STOP=-r
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<userinput>EOF</userinput></screen></para>
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<command>EOF</command></userinput></screen>
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<para>For more information on the appropriate
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<envar>DHCP_START</envar> and <envar>DHCP_STOP</envar>
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values, examine the man page for dhclient.</para>
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values, examine the man page for <command>dhclient</command>.</para>
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<para>Next, you should then create
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the <filename>/etc/dhclient.conf</filename> using the following command:</para>
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<para><screen><userinput>cat > /etc/dhclient.conf << "EOF"</userinput>
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<screen><userinput><command>cat > /etc/dhclient.conf << "EOF"</command>
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# dhclient.conf
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interface "eth0"{
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@ -47,6 +48,6 @@ request subnet-mask, broadcast-address, time-offset, routers,
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require subnet-mask, domain-name-servers;
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}
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# end dhclient.conf
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<userinput>EOF</userinput></screen></para>
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<command>EOF</command></userinput></screen>
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</sect1>
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@ -1,20 +1,22 @@
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<chapter id="connect-dhcp">
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<?dbhtml filename="dhcp.html" dir="connect"?>
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<title>DHCP Clients</title>
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<title><acronym>DHCP</acronym> Clients</title>
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<para>DHCP stands for Dynamic Host Configuration Protocol. It is a
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protocol which is used by many sites to automatically provide
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information such as IP addresses, subnet masks and routing information
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to computers. If your network uses DHCP, you will need a DHCP client
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in order to connect to it. DHCP is also used by some cable
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modems.</para>
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<para><acronym>DHCP</acronym> stands for Dynamic Host Configuration Protocol.
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It is a protocol which is used by many sites to automatically provide
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information such as <acronym>IP</acronym> addresses, subnet masks and routing
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information to computers. If your network uses <acronym>DHCP</acronym>, you
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will need a <acronym>DHCP</acronym> client in order to connect to it.
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<acronym>DHCP</acronym> is also used by some cable modems.</para>
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<para>We currently provide installation instructions for two DHCP
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clients, dhclient (from the dhcp package) and dhcpcd. We begin with a page
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which shows how to alter the LFS bootscripts for generic DHCP support.
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We then present the two sets of installation instructions which also discuss
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<para>We currently provide installation instructions for two
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<acronym>DHCP</acronym> clients, <command>dhclient</command> (from the
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<application>dhcp</application> package) and <command>dhcpcd</command>. We
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begin with a page which shows how to alter the <acronym>LFS</acronym>
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bootscripts for generic <acronym>DHCP</acronym> support. We then present the
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two sets of installation instructions which also discuss
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how to create an appropriate configuration file to work with the
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DHCP client of your choice.</para>
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<acronym>DHCP</acronym> client of your choice.</para>
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&connect-dhcp-bootscripts;
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&connect-dhcp-client;
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@ -1,5 +1,5 @@
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<sect2>
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<title>Configuring ppp</title>
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<title>Configuring <application>ppp</application></title>
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<sect3><title>Config files</title>
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<para><filename>/etc/ppp/*</filename></para>
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<sect3><title>Configuration Information</title>
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<para>The ppp daemon itself requires very little configuration. The
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main trick is script the connection. This can be done either using the
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main trick is scripting the connection. This can be done either using the
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chat program which comes with this package or by using <xref
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linkend="wvdial"/>.</para>
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</sect3>
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<sect2>
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<title>Contents</title>
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<para>The ppp package contains the <userinput>chat</userinput>,
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<userinput>pppd</userinput>, <userinput>pppdump</userinput> and
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<userinput>pppstats</userinput> programs.</para>
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<para>The <application>ppp</application> package contains the
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<command>chat</command>,
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<command>pppd</command>, <command>pppdump</command> and
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<command>pppstats</command> programs.</para>
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</sect2>
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<sect2><title>Description</title>
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<sect3><title>chat</title>
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<para>The chat program defines a conversational exchange between the
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computer and the modem. Its primary purpose is to establish the connection
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between the Point-to-Point Protocol Daemon (pppd) and the remote's
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pppd process.</para></sect3>
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<para>The <command>chat</command> program defines a conversational exchange
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between the computer and the modem. Its primary purpose is to establish the
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connection between the Point-to-Point Protocol Daemon
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(<acronym>pppd</acronym>) and the remote's <command>pppd</command> process.
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</para></sect3>
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<sect3><title>pppd</title>
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<para>pppd is the Point to Point Protocol daemon.</para></sect3>
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<para><command>pppd</command> is the Point to Point Protocol daemon.</para></sect3>
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<sect3><title>pppdump</title>
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<para>pppdump is used to convert PPP record files
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<para><command>pppdump</command> is used to convert
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<acronym>PPP</acronym> record files
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to a readable format.</para></sect3>
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<sect3><title>pppstats</title>
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<para>pppstats is used to print PPP statistics.</para></sect3>
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<para><command>pppstats</command> is used to print
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<acronym>PPP</acronym> statistics.</para></sect3>
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</sect2>
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<sect2>
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<title>Installation of ppp</title>
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<title>Installation of <application>ppp</application></title>
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<para>Install ppp by running the following commands:</para>
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<note><para><acronym>PPP</acronym> support must be compiled into the
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kernel or available as a kernel module.</para></note>
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<para><screen><userinput>./configure &&
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<para>Install <application>ppp</application> by running the following commands:
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</para>
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<screen><userinput><command>./configure &&
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make &&
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make install</userinput></screen></para>
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make install</command></userinput></screen>
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</sect2>
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@ -1,17 +1,26 @@
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<sect2>
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<title>Introduction to ppp</title>
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<title>Introduction to <application>ppp</application></title>
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<screen>Download location (HTTP): <ulink url="&ppp-download-http;"/>
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Download location (FTP): <ulink url="&ppp-download-ftp;"/>
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Version used: &ppp-version;
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Package size: &ppp-size;
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Estimated Disk space required: &ppp-buildsize;</screen>
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<para>The ppp package contains the pppd daemon and the chat program.
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<para>The <application>ppp</application> package contains the <command>pppd
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</command> daemon and the <command>chat</command> program.
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This is used for connecting to other machines; often for connecting to
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the Internet via a dial-up connection to an ISP.</para>
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the Internet via a dial-up connection to an <acronym>ISP</acronym>.</para>
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<sect3><title>Package information</title>
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<itemizedlist spacing='compact'>
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<listitem><para>Download (HTTP): <ulink
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url="&ppp-download-http;"/></para></listitem>
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<listitem><para>Download (FTP): <ulink
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url="&ppp-download-ftp;"/></para></listitem>
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<listitem><para>Download size: &ppp-size;</para></listitem>
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<listitem><para>Estimated Disk space required:
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&ppp-buildsize;</para></listitem>
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<listitem><para>Estimated build time:
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&ppp-time;</para></listitem></itemizedlist>
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</sect3>
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<!--
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<screen>ppp needs nothing to compile but you must have PPP support
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either compiled in or as a kernel module to use it.</screen>
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either compiled in or as a kernel module to use it.</screen> -->
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</sect2>
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@ -8,3 +8,4 @@
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<!ENTITY ppp-download-http "">
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<!ENTITY ppp-download-ftp "ftp://cs.anu.edu.au/pub/software/ppp/ppp-2.4.1.tar.gz">
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<!ENTITY ppp-size "524 KB">
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<!ENTITY ppp-time "">
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