SRV_COS_07_DHCP.sh

#!/bin/bash
echo
echo ##########################
echo # Creado por:  gomgardav #
echo # [ David Gómez García ] #
echo ##########################
echo

log=./srv_cos_07_salida.sal
cd ~/samba || exit
source ./00_00_VAR.sh

Menu () {
   SalidaMenu=$(whiptail    --title "Script 07"                         \
                            --menu "Selecciona una Opción" 13 35 5      \
                                    1       "Actualizar"                \
                                    2       "Generar History"           \
                                    3       "Ejecutar Script"           \
                                    4       "Reiniciar"                 \
                                    0       "Salir" 3>&1 1>&2 2>&3)
    EstadoSalidaMenu=$?
}

EstadoSalidaMenu=0
while [ "$EstadoSalidaMenu" = 0 ]; do

    Menu
    Exit=no

    case "$SalidaMenu" in

        1 ) yum update -y && ym upgrade -y;;

        2 ) HISTFILE=~/.bash_history && set -o history && history > ./srv_cos_07-history_"$(date +%F_%H-%M-%S)".his && history -c && set +o history && HISTFILE="";;

        3 ) 
            rm "$log"
			dnf -y update
			dnf -y install dhcp dhcp-devel dhcp-libs
            systemctl enable dhcpd
			systemctl stop dhcpd

				Destino=/etc/dhcp/dhcpd.conf
			cat << EOF > $Destino
# dhcpd.conf
#
# Sample configuration file for ISC dhcpd
#

# option definitions common to all supported networks...
option domain-name "$dominio.$extension";
option domain-name-servers $Dns;
option routers $IpGatewayDhcp;

default-lease-time 3600;
max-lease-time 7200;

# The ddns-updates-style parameter controls whether or not the server will
# attempt to do a DNS update when a lease is confirmed. We default to the
# behavior of the version 2 packages ('none', since DHCP v2 didn't
# have support for DDNS.)
ddns-update-style interim;
ddns-domainname "$dominio.$extension";
update-static-leases on;

# 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 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.example.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.example.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;
#  }
#}

## Rangos de IPs:

subnet $IpNetworkDhcp netmask $NetmaskDhcp {
	range $IpDhcpIni $IpDhcpFin;
}

## Reservas de IPs:

host $HostnameClie {
	hardware ethernet $MacClie;
	fixed-address $IpClie;
	option host-name "$HostnameClie";
	ddns-hostname "$HostnameClie";
}


zone $dominio.$extension. {
        primary 127.0.0.1;
}

zone $PrefIpServInve.in-addr.arpa. {
        primary 127.0.0.1;
}

EOF

# 				Destino=/etc/default/isc-dhcp-server
# 			cat << EOF > $Destino 
# # Defaults for isc-dhcp-server (sourced by /etc/init.d/isc-dhcp-server)

# # Path to dhcpd's config file (default: /etc/dhcp/dhcpd.conf).
# #DHCPDv4_CONF=/etc/dhcp/dhcpd.conf
# #DHCPDv6_CONF=/etc/dhcp/dhcpd6.conf

# # Path to dhcpd's PID file (default: /var/run/dhcpd.pid).
# #DHCPDv4_PID=/var/run/dhcpd.pid
# #DHCPDv6_PID=/var/run/dhcpd6.pid

# # Additional options to start dhcpd with.
# #	Don't use options -cf or -pf here; use DHCPD_CONF/ DHCPD_PID instead
# #OPTIONS=""

# # On what interfaces should the DHCP server (dhcpd) serve DHCP requests?
# #	Separate multiple interfaces with spaces, e.g. "eth0 eth1".
# INTERFACESv4="enp0s3"
# INTERFACESv6=""

# EOF

			systemctl restart dhcpd

			Enter="Enter"
            while [ -n "$Enter" ]; do
                echo
                read -p "Pulsa Enter para Continuar..." Enter
            done

            HISTFILE=~/.bash_history && set -o history && history > ./srv_cos_07-history_"$(date +%F_%H-%M-%S)".his && history -c && set +o history && HISTFILE="";;

        4 ) reboot; exit;;
        
        0 ) Exit=yes; break;;

        * ) echo "Error en el Script !!!";;

    esac

done

clear
if [ "$Exit" = "yes" ] && [ "$EstadoSalidaMenu" = "0" ]; then
    echo "Has Salido Correctamente !"

elif [ "$EstadoSalidaMenu" = "1" ]; then
    echo "Has seleccionado Cancelar !"

else
    echo "Ha habido un Error !!!"

fi