Dhcpd
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dhpcd (Dynamic Host Configuration Protocol Daemon) is a DHCP-daemon which manages dynamic IP addresses. It reads its configuration from /etc/dhcpd.conf. dhcpd keeps track of the current leases in dhcpd.leases, usually located in /var/db. You can usually install dhcpd from your distribution as described under installing software. If this is not possible, download it from www.isc.org.
# Sample /etc/dhcpd.conf
ddns-update-style interim;
authoritative;
default-lease-time 600;
max-lease-time 3600;
option broadcast-address 192.168.1.255;
option routers 192.168.1.254;
option domain-name-servers 192.168.1.1, 192.168.1.2;
option domain-name "mydomain.net";
subnet 192.168.1.0 netmask 255.255.255.0 {
range 192.168.1.10 192.168.1.100;
range 192.168.1.150 192.168.1.200;
}
Start your dhcp-server using
/etc/init.d/dhcpd
add a static host
If you want one of your hosts to always get the same IP address, add something like this inside the subnet definition:
host somecomputer { hardware ethernet 0:a1:a1:0:b4:56; fixed-address 10.0.0.1; }
somecomputer is the hostname, the 0:a1 stuff is the MAC address, and 10.0.0.1 is the IP that will always get assigned to it.