echo 1 > /proc/sys/net/ipv4/ip_forward
iptables -t nat -A POSTROUTING -o wlan0 -j MASQUERADE
#iptables -t nat -A POSTROUTING -o eth1 -j MASQUERADE
iptables -A FORWARD -i eth0 -j ACCEPT
ifconfig eth0 192.168.3.1

##eth0 - wired, eth1 or wlan0 or ath0 - wireless in gateway
##set client 192.168.3.2 etc.