Linux简明系统维护手册(三)

　　# dhcpd.conf

　　#

　　# Sample configuration file for ISC dhcpd

　　#



　　# option definitions common to all supported networks...

　　option domain-name "rd.xxx.com";

　　option domain-name-servers compaq.rd.xxx.com;



　　default-lease-time 86400;

　　max-lease-time 172800;



　　ddns-update-style ad-hoc;



　　# If this DHCP server is the official DHCP server for the local

　　# network, the authoritative directive should be uncommented.

　　#authoritative;



　　# Use this to send dhcp log messages to a different log file (you also

　　# have to hack syslog.conf to complete the redirection).

　　log-facility local7;



　　# No service will be given on this subnet, but declaring it helps the

　　# DHCP server to understand the network topology.



　　# This is a very basic subnet declaration.



　　subnet 21.9.22.0 netmask 255.255.255.224 {

　　　　range 21.9.22.2 21.9.22.6;

　　　　option routers 21.9.22.1;

　　}



　　# This declaration allows BOOTP clients to get dynamic addresses,

　　# which we don't really recommend.



　　#subnet 10.254.239.32 netmask 255.255.255.224 　　{

　　　　#  range dynamic-bootp 10.254.239.40 10.254.239.60;

　　　　#  option broadcast-address 10.254.239.31;

　　　　#  option routers rtr-239-32-1.example.org;

　　#}



　　# A slightly different configuration for an internal subnet.

　　#subnet 10.5.5.0 netmask 255.255.255.224 {

　　#  range 10.5.5.26 10.5.5.30;

　　#  option domain-name-servers ns1.internal.example.org;

　　#  option domain-name "internal.example.org";

　　#  option routers 10.5.5.1;

　　#  option broadcast-address 10.5.5.31;

　　#  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 subnet

　　# to 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;

　　#}



　　# You can declare a class of clients and then do address allocation

　　# based on that.   The example below shows a case where all clients

　　# in a certain class get addresses on the 10.17.224/24 subnet, and all

　　# other clients get addresses on the 10.0.29/24 subnet.

　　

　　#class "foo" {

　　#  match if substring (option vendor-class-identifier, 0, 4) = "SUNW";

　　#}



　　#shared-network 224-29 {

　　#  subnet 10.17.224.0 netmask 255.255.255.0 {

　　#    option routers rtr-224.example.org;

　　#  }

　　#  subnet 10.0.29.0 netmask 255.255.255.0 {

　　#    option routers rtr-29.example.org;

　　#  }

　　#  pool {

　　#    allow members of "foo";

　　#    range 10.17.224.10 10.17.224.250;

　　#  }

　　#  pool {

　　#    deny members of "foo";

　　#    range 10.0.29.10 10.0.29.230;

　　#  }