//Install dhcp server [root@localhost ~]#yum install dhcp //We shoule copy /usr/share/doc/dhcp-4.2.0/dhcpd.conf.sample to /etc/dhcp/dhcpd.conf //and modifiy /etc/dhcp/dhcpd.conf as the following [root@localhost ~]#cat /etc/dhcp/dhcpd.conf # dhcpd.conf # # Sample configuration file for ISC dhcpd # # option definitions common to all supported networks... option domain-name "example.org"; option domain-name-servers ns1.example.org, ns2.example.org; default-lease-time 600; max-lease-time 7200; # Use this to enble / disable dynamic dns updates globally. #ddns-update-style none; # 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. subnet 10.152.187.0 netmask 255.255.255.0 { } # This is a very basic subnet declaration. subnet 10.254.239.0 netmask 255.255.255.224 { range 10.254.239.10 10.254.239.20; option routers rtr-239-0-1.example.org, rtr-239-0-2.example.org; } # 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 192.168.1.0 netmask 255.255.255.0 { range 192.168.1.30 192.168.1.150; option domain-name-servers 192.168.1.254; option domain-name "internal.org"; option routers 192.168.1.254; option broadcast-address 192.168.1.255; default-lease-time 6000; max-lease-time 7200; } subnet 172.21.69.0 netmask 255.255.255.0 { } # 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; } } [root@localhost ~]# //Depends on the above setting, wlan interface IP would be 192.168.1.254 [root@localhost ~]#ifconfig wlan14 192.168.1.254 //Set only one interface as dhcp server [root@localhost ~]#cat /etc/sysconfig/dhcpd # Command line options here DHCPDARGS=wlan0 //If /var/lib/dhcpd/dhcpd.leases doesn't exist, //we should establish it //This file is used to record clients information. [root@localhost ~]#touch /var/lib/dhcpd/dhcpd.leases //Execute [root@localhost ~]#/etc/rc.d/init.d/dhcpd start