CONFIGURACION DHCP | CENTOS 7

Cambiar el hostname del servidor
$> hostnamectl set-hostname srvdhcp.dominio.local
$> exit

Configurar IP del host
$> vim /etc/hosts
127.0.0.1 localhost.localdomain localhost
192.168.2.20 srvdhcp.dominio.local srvdhcp

$> yum -y install dhcp

Restaurar contextos de SELinux.
$> restorecon /etc/dhcp/dhcpd.conf

Editar el archivo dhcpd.conf
$> vim /etc/dhcp/dhcpd.conf

-------------------------------------------------------------------------------
ddns-update-style interim;
ignore client-updates;
authoritative;
default-lease-time 28800;
max-lease-time 43200;
option ip-forwarding off;
option time-offset -18000; # Eastern Standard Time
option domain-name "midominio.local";
option domain-name-servers 10.1.1.2;
option ntp-servers 0.pool.ntp.org, 1.pool.ntp.org, 2.pool.ntp.org, 3.pool.ntp.org;

shared-network midominio { 

# Oficina Principal
    subnet 10.1.1.0 netmask 255.255.255.0 {
        option routers 10.1.1.1;
        option subnet-mask 255.255.255.0;
        option broadcast-address 10.1.1.255;
        range 10.1.1.11 10.1.1.200;
# Equipos con IP fija.
host impresora {
        option host-name "epson01.midominio.local";
        hardware ethernet 00:0C:29:46:90:DF;
        fixed-address 10.1.1.199;
        }
host pc14 {
        option host-name "pc14.midominio.local";
        hardware ethernet 00:50:BF:27:1C:1C;
        fixed-address 10.1.1.161;
        }
    }

# Oficina Sucursal
     subnet 10.1.2.0 netmask 255.255.255.0 {
        # option routers 10.1.2.1;
        option subnet-mask 255.255.255.0;
        option broadcast-address 10.1.2.255;
        range 10.1.2.20 10.1.2.30;
}
}
------------------------------------------------------------------------
Permitir el acceso a los puertos de DHCP en el firewall:
$> yum -y install firewalld
$> systemctl start firewalld
$> systemctl enable firewalld

$> firewall-cmd --add-port 67-68/udp --permanent
$> firewall-cmd --reload
$> iptables -S

Iniciar el servicio DHCP
$> systemctl start dhcpd
$> systemctl enable dhcpd

Verificar errores del servicio dhcpd:
$> dhcpd -t

Muestra ips y mac de clientes:
$> cat /var/lib/dhcpd/dhcpd.leases