Author
Christopher Marshall (christopherlmarshall@yahoo.com)
A DHCP Example Script
#!/bin/bash
#
# suppose you have one ethernet interface that connects you to the internet
# and another on which you want to allow other computers to share the internet
# connection. A common scenario might be a laptop plugged into a DSL
# router through one interface and running a wireless ad-hoc network on
# another.
#
# This script shows how to do that, although you really have to know a lot
# about linux networking to use it, so be warned.
eth_dev=eth1
eth_internet=eth0
(
echo "ddns-update-style none;"
echo "subnet 10.0.1.0 netmask 255.255.255.0 {"
echo " range 10.0.1.10 10.0.1.20;"
echo " option routers 10.0.1.1;"
echo " option domain-name \"example.net\";"
echo " option domain-name-servers 192.168.1.1;"
echo "}"
) > dhcpd.conf
touch dhcpd.lease
ifconfig $eth_dev 10.0.1.1 netmask 255.255.255.0 up
iptables -t nat -F
iptables -t nat -A POSTROUTING -o $eth_internet -s 10.0.1.0/24 -j MASQUERADE
dhcpd -cf ./dhcpd.conf -lf ./dhcpd.lease -d -f $eth_dev