Setup linux dhcp serveur (debian)

1README.md

file location :

• /etc/dhcp/dhcpd.conf
• /etc/default/isc-dhcp-server
• /etc/rsyslog.d/50-default.conf

Administation tool

dhcp-admin

Documentation :

https://kb.isc.org/docs/aa-00333

50-default.conf

# Restart resyslog service to consider modification
local7.*          /var/log/dhcpd.log

dhcpd.conf

# dhcpd.conf
#
# Sample configuration file for ISC dhcpd
#

# option definitions common to all supported networks...
# option domain-name "callmarl";
# option domain-name-servers dns1.callmarl

default-lease-time 600;
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 none;

# If this DHCP server is the official DHCP server for the local
# network, the authoritative directive should be uncommented.
#authoritative;

# No service will be given on this subnet, but declaring it helps the
# DHCP server to understand the network topology.

# eth1 interface
subnet 172.16.1.0 netmask 255.255.255.0 {
        range 172.16.1.50 172.16.1.100;

        # option definitions common to local subnet...
        option domain-name "callmarl";
        option domain-name-servers dns1.callmarl;

        option subnet-mask 255.255.255.0;
        option broadcast-address 172.16.1.254;
        option routers 172.16.1.1;
}

# 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";
#}

# 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;

install.sh

# Download paquage
apt-get update && apt-get upgrade -y
apt-get install isc-dhcp-server

# Create log file
touch /var/log/dhcpd.log

# Start service
service rsyslog restart
service isc-dhcp-server start

# Check service is running
service isc-dhcp-server status
netstat -unlp

# Extends firewall rules
iptables -t filter -A INPUT -i eth1 -p udp --dport 59 -j ACCEPT
iptables -t filter -A OUTPUT -o eth1 -p udp --sport 59 -j ACCEPT

# display current lease
dhcp-lease-list

isc-dhcp-server

# 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="eth1"
INTERFACESv6=""