ifconfig eth0 down
/etc/rc.d/iptables stop
ifconfig eth0 20.1.0.1 netmask 255.255.255.0
ifconfig eth0 up
echo 1 > /proc/sys/net/ipv4/ip_forward
iptables -t nat -A POSTROUTING -o wlan0 -j MASQUERADE
/etc/rc.d/iptables save
/etc/rc.d/iptables start