Network

sudo update-alternatives --list iptables

sudo update-alternatives --config iptables

sudo mv /usr/sbin/iptables /root/scripts

sudo ln -s /usr/sbin/iptables-legacy /usr/sbin/iptables

iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

iptables -A FORWARD -i eth1 -o eth0 -m state --state RELATED,ESTABLISHED -j ACCEPT

iptables -A FORWARD -i eth1 -o eth0 -j ACCEPT

vi /etc/dhcpd.conf

interface eth1

static ip_address=172.16.12.100 /24

apt-get install -y dnsmasq

vi /etc/dnsmasq.conf

interface=eth1

dhcp-range=172.16.12.10,172.16.12.50,255.255.255.0,24h

dhcp-option=option:router,172.16.12.100

service dnsmasq restart