diff options
Diffstat (limited to 'chapter07/network.xml')
| -rw-r--r-- | chapter07/network.xml | 247 |
1 files changed, 0 insertions, 247 deletions
diff --git a/chapter07/network.xml b/chapter07/network.xml deleted file mode 100644 index b527258ee..000000000 --- a/chapter07/network.xml +++ /dev/null @@ -1,247 +0,0 @@ -<?xml version="1.0" encoding="ISO-8859-1"?> -<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" - "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [ - <!ENTITY % general-entities SYSTEM "../general.ent"> - %general-entities; -]> - -<sect1 id="ch-config-network" revision="sysv"> - <?dbhtml filename="network.html"?> - - <title>General Network Configuration</title> - - <indexterm zone="ch-config-network"> - <primary sortas="d-network">network</primary> - <secondary>configuring</secondary></indexterm> -<!-- - <para>This section only applies if a network card is to be - configured.</para> - - <para>If a network card will not be used, there is likely no need to create - any configuration files relating to network cards. If that is the case, you - will need to remove the <filename class="symlink">network</filename> symlinks - from all run-level directories (<filename - class="directory">/etc/rc.d/rc*.d</filename>) after the bootscripts are - installed in <xref linkend="ch-config-bootscripts"/>.</para> ---> - <sect2> - <title>Creating Network Interface Configuration Files</title> - - <para>Which interfaces are brought up and down by the network script - usually depends on the files in <filename - class="directory">/etc/sysconfig/</filename>. This directory should - contain a file for each interface to be configured, such as - <filename>ifconfig.xyz</filename>, where <quote>xyz</quote> should describe - the network card. The interface name (e.g. eth0) is usually appropriate. - Inside this file are attributes to this interface, such as its IP - address(es), subnet masks, and so forth. It is necessary that the stem of - the filename be <emphasis>ifconfig</emphasis>.</para> - - <note><para>If the procedure in the previous section was not used, Udev - will assign network card interface names based on system physical - characteristics such as enp2s1. If you are not sure what your interface - name is, you can always run <command>ip link</command> or <command>ls - /sys/class/net</command> after you have booted your system. - </para></note> - - <para>The following command creates a sample file for the - <emphasis>eth0</emphasis> device with a static IP address:</para> -<!-- jhalfs relies on the values for IFACE, IP, etc. If you want to change - them, please inform the jhalfs maintainer(s). --> -<screen><userinput>cd /etc/sysconfig/ -cat > ifconfig.<replaceable>eth0</replaceable> << "EOF" -<literal>ONBOOT=<replaceable>yes</replaceable> -IFACE=<replaceable>eth0</replaceable> -SERVICE=<replaceable>ipv4-static</replaceable> -IP=<replaceable>192.168.1.2</replaceable> -GATEWAY=<replaceable>192.168.1.1</replaceable> -PREFIX=<replaceable>24</replaceable> -BROADCAST=<replaceable>192.168.1.255</replaceable></literal> -EOF</userinput></screen> - - <para>The values in italics must be changed in every file to match - the proper setup.</para> - - <para>If the <envar>ONBOOT</envar> variable is set to <quote>yes</quote> the - System V network script will bring up the Network Interface Card (NIC) during - booting of the system. If set to anything but <quote>yes</quote> the NIC - will be ignored by the network script and not be automatically brought up. - The interface can be manually started or stopped with the - <command>ifup</command> and <command>ifdown</command> commands.</para> - - <para>The <envar>IFACE</envar> variable defines the interface name, - for example, eth0. It is required for all network device configuration - files. The filename extension must match this value.</para> - - <para>The <envar>SERVICE</envar> variable defines the method used for - obtaining the IP address. The LFS-Bootscripts package has a modular IP - assignment format, and creating additional files in the <filename - class="directory">/lib/services/</filename> directory allows other IP - assignment methods. This is commonly used for Dynamic Host Configuration - Protocol (DHCP), which is addressed in the BLFS book.</para> - - <para>The <envar>GATEWAY</envar> variable should contain the default - gateway IP address, if one is present. If not, then comment out the - variable entirely.</para> - - <para>The <envar>PREFIX</envar> variable contains the number of - bits used in the subnet. Each octet in an IP address is 8 bits. If the - subnet's netmask is 255.255.255.0, then it is using the first three octets - (24 bits) to specify the network number. If the netmask is 255.255.255.240, - it would be using the first 28 bits. Prefixes longer than 24 bits are - commonly used by DSL and cable-based Internet Service Providers (ISPs). - In this example (PREFIX=24), the netmask is 255.255.255.0. Adjust the - <envar>PREFIX</envar> variable according to your specific subnet. - If omitted, the PREFIX defaults to 24.</para> - - <para>For more information see the <command>ifup</command> man page.</para> - - </sect2> - <sect2 id="resolv.conf"> - <title>Creating the /etc/resolv.conf File</title> - - <indexterm zone="resolv.conf"> - <primary sortas="e-/etc/resolv.conf">/etc/resolv.conf</primary> - </indexterm> - - <para>The system will need some means of obtaining Domain Name Service - (DNS) name resolution to resolve Internet domain names to IP addresses, and - vice versa. This is best achieved by placing the IP address of the DNS - server, available from the ISP or network administrator, into - <filename>/etc/resolv.conf</filename>. Create the file by running the - following:</para> - -<screen><userinput>cat > /etc/resolv.conf << "EOF" -<literal># Begin /etc/resolv.conf - -domain <replaceable><Your Domain Name></replaceable> -nameserver <replaceable><IP address of your primary nameserver></replaceable> -nameserver <replaceable><IP address of your secondary nameserver></replaceable> - -# End /etc/resolv.conf</literal> -EOF</userinput></screen> - - <para>The <varname>domain</varname> statement can be omitted - or replaced with a <varname>search</varname> statement. See the man page for - resolv.conf for more details.</para> - - <para>Replace <replaceable><IP address of the nameserver></replaceable> - with the IP address of the DNS most appropriate for the setup. There will - often be more than one entry (requirements demand secondary servers for - fallback capability). If you only need or want one DNS server, remove the - second <emphasis>nameserver</emphasis> line from the file. The IP address - may also be a router on the local network.</para> - - <note> - <para>The Google Public IPv4 DNS addresses are 8.8.8.8 and 8.8.4.4.</para> - </note> - - </sect2> - - <sect2 id="ch-config-hostname"> - <title>Configuring the system hostname</title> - - <indexterm zone="ch-config-hostname"> - <primary sortas="d-hostname">hostname</primary> - <secondary>configuring</secondary> - </indexterm> - - <para>During the boot process, the file <filename>/etc/hostname</filename> - is used for establishing the system's hostname.</para> - - <para>Create the <filename>/etc/hostname</filename> file and enter a - hostname by running:</para> - -<screen><userinput>echo "<replaceable><lfs></replaceable>" > /etc/hostname</userinput></screen> - - <para><replaceable><lfs></replaceable> needs to be replaced with the - name given to the computer. Do not enter the Fully Qualified Domain Name - (FQDN) here. That information is put in the - <filename>/etc/hosts</filename> file.</para> - - </sect2> - - <sect2 id="ch-config-hosts"> - <title>Customizing the /etc/hosts File</title> - - <indexterm zone="ch-config-hosts"> - <primary sortas="e-/etc/hosts">/etc/hosts</primary> - </indexterm> - - <indexterm zone="ch-config-hosts"> - <primary sortas="d-localnet">localnet</primary> - <secondary>/etc/hosts</secondary> - </indexterm> - - <indexterm zone="ch-config-hosts"> - <primary sortas="d-network">network</primary> - <secondary>/etc/hosts</secondary> - </indexterm> - - <para>Decide on the IP address, fully-qualified domain name (FQDN), and - possible aliases for use in the <filename>/etc/hosts</filename> file. The - syntax is:</para> - -<screen><literal>IP_address myhost.example.org aliases</literal></screen> - - <para>Unless the computer is to be visible to the Internet (i.e., there is - a registered domain and a valid block of assigned IP addresses—most - users do not have this), make sure that the IP address is in the private - network IP address range. Valid ranges are:</para> - -<screen><literal>Private Network Address Range Normal Prefix -10.0.0.1 - 10.255.255.254 8 -172.x.0.1 - 172.x.255.254 16 -192.168.y.1 - 192.168.y.254 24</literal></screen> - - <para>x can be any number in the range 16-31. y can be any number in the - range 0-255.</para> - - <para>A valid private IP address could be 192.168.1.1. A valid FQDN for - this IP could be lfs.example.org.</para> - - <para>Even if not using a network card, a valid FQDN is still required. - This is necessary for certain programs to operate correctly.</para> - - <para>Create the <filename>/etc/hosts</filename> file by running:</para> - -<screen><userinput>cat > /etc/hosts << "EOF" -<literal># Begin /etc/hosts - -127.0.0.1 localhost.localdomain localhost -127.0.1.1 <replaceable><FQDN></replaceable> <replaceable><HOSTNAME></replaceable> -<replaceable><192.168.1.1></replaceable> <replaceable><FQDN></replaceable> <replaceable><HOSTNAME></replaceable> <replaceable>[alias1] [alias2 ...]</replaceable> -::1 localhost ip6-localhost ip6-loopback -ff02::1 ip6-allnodes -ff02::2 ip6-allrouters - -# End /etc/hosts</literal> -EOF</userinput></screen> - - <para>The <replaceable><192.168.1.1></replaceable>, - <replaceable><FQDN></replaceable>, and - <replaceable><HOSTNAME></replaceable> values need to be - changed for specific uses or requirements (if assigned an IP address by a - network/system administrator and the machine will be connected to an - existing network). The optional alias name(s) can be omitted.</para> - -<!-- This is not very useful - - <para>If a network card is not going to be configured, create the - <filename>/etc/hosts</filename> file by running:</para> - -<screen role="nodump"><userinput>cat > /etc/hosts << "EOF" -<literal># Begin /etc/hosts (no network card version) - -127.0.0.1 localhost -127.0.1.1 <replaceable><FQDN></replaceable> <replaceable><HOSTNAME></replaceable> -::1 localhost ip6-localhost ip6-loopback -ff02::1 ip6-allnodes -ff02::2 ip6-allrouters - -# End /etc/hosts (no network card version)</literal> -EOF</userinput></screen> --> - - </sect2> - -</sect1> |