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Debian DHCP-Server

Ziel

Den Computern des lokalen Netzwerkes soll automatisch eine IP-Adresse zuzgewiesen werden. Diese Funktion spiegelt sich auch im Namen wider. DHCP bedeutet: 'Dynamic Host Configuration Protocol'.

Installation

# apt-get install dhcp

Es gibt noch keine gültigen Konfigurationseinstellungen. Deswegen erscheint nach der Installation folgende Meldung:

Starting DHCP server: dhcpd failed to start - check syslog for diagnostics
Starte DHCP-Server: dhcpd Start fehlgeschlagen - sehen Sie in syslog nach, um den Fehler zu finden.

Unter /etc/syslog steht dann:

No subnet declaration for eth0. Please write a subnet declaration in your dhcpd.conf file for the network segment to which interface eth is attached.
Keine Subnetbeschreibung für eth0. Bitte schreiben Sie eine Subnetzbeschreibung in Ihre dhcpd.conf-Datei für das Netzwerksegment, an welches die Schnittstelle eth0 angeschlossen ist.

Konfiguration

Bearbeitet wird: /etc/dhcpd.conf

#
# Sample configuration file for ISC dhcpd for Debian
#
# $Id: dhcpd.conf,v 1.4.2.2 2002/07/10 03:50:33 peloy Exp $
#

# option definitions common to all supported networks...
# option domain-name "fugue.com";
# option domain-name-servers toccata.fugue.com;

#option subnet-mask 255.255.255.224;
#default-lease-time 600;
#max-lease-time 7200;

#subnet 204.254.239.0 netmask 255.255.255.224 {
# range 204.254.239.10 204.254.239.20;
# option broadcast-address 204.254.239.31;
# option routers prelude.fugue.com;
#}
# Eigene Einstellungen Anfang
subnet 192.168.0.0 netmask 255.255.255.0 {
option domain-name "domainname.de";
option domain-name-servers 192.168.0.10;
option subnet-mask 255.255.255.0;
range 192.168.0.20 192.168.0.30;
option routers 192.168.0.11;
default-lease-time 600;
max-lease-time 7200;
}
# Eigene Einstellungen Ende
# The other subnet that shares this physical network
#subnet 204.254.239.32 netmask 255.255.255.224 {
# range dynamic-bootp 204.254.239.10 204.254.239.20;
# option broadcast-address 204.254.239.31;
# option routers snarg.fugue.com;
#}

#subnet 192.5.5.0 netmask 255.255.255.224 {
# range 192.5.5.26 192.5.5.30;
# option name-servers bb.home.vix.com, gw.home.vix.com;
# option domain-name "vix.com";
# option routers 192.5.5.1;
# option subnet-mask 255.255.255.224;
# option broadcast-address 192.5.5.31;
# default-lease-time 600;
# max-lease-time 7200;
#}

# Hosts which require special configuration options can
# be listed in host statements. If no address is
# specified, the address will be allocated dynamically
# (if possible), but the host-specific information
# will still come from the host declaration.

#host passacaglia {
# hardware ethernet 0:0:c0:5d:bd:95;
# filename "vmunix.passacaglia";
# server-name "toccata.fugue.com";
#}

# Fixed IP addresses can also be specified for hosts.
# These addresses should not also be listed as being
# available for dynamic assignment. Hosts for which
# fixed IP addresses have been specified can boot using
# BOOTP or DHCP. Hosts for which no fixed address is
# specified can only be booted with DHCP, unless there
# is an address range on the subnetto which a BOOTP
# client is connected which has the dynamic-bootp flag
# set.

#host fantasia {
# hardware ethernet 08:00:07:26:c0:a5;
# fixed-address fantasia.fugue.com;
#}

# If a DHCP or BOOTP client is mobile and might be
# connected to a variety of networks, more than one fixed
# address for that host can be specified. Hosts can have
# fixed addresses on some networks, but receive dynamically
# allocated address on other subnets; in order to support
# this, a host declaration for that client must be given
# which does not have a fixed address. If a client should
# get different parameters depending on what subnet it boots
# on, host declarations for each such network shouldbe given.
# Finally, if a domain name is given for a host's fixed
# address and that domain name evaluates to more than one
#address, the address corresponding to the network to which
# the client is attached, if any,will be assigned.

#host confusia {
# hardware ethernet 02:03:04:05:06:07;
# fixed-address confusia-1.fugue.com, confusia-2.fugue.com;
# filename "vmunix.confusia";
# server-name "toccata.fugue.com";
#}

#host confusia {
# hardware ethernet 02:03:04:05:06:07;
# fixed-address confusia-3.fugue.com;
# filename "vmunix.confusia";
# server-name "snarg.fugue.com";
#}

#host confusia {
# hardware ethernet 02:03:04:05:06:07;
# filename "vmunix.confusia";
# server-name "bb.home.vix.com";
#}

Dienst starten

# /etc/init.d/dhcp start

Erfolgskontrolle unter /var/log/syslog

Sep 15 11:44:58 dhcpserver dhcpd: DHCPREQUEST for ...
Sep 15 11:44:58 dhcpserver dhcpd: DHCPACK on ...

Laufende Kontrolle des Protokolles von der Konsole aus mit:

# tail -f /var/log/syslog
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