Create AP from any laptop with wifi and ethernet card

So, you have a laptop with wifi and enternet card and you want to make "real" AP from it. There are many ways to do this, but I like this one:

Install packages required: apt-get install dnsmasq configure /etc/dnsmasq.conf to be DHCP server for your wifi network: listen-address=192.168.42.1 dhcp-range=192.168.42.42,192.168.42.242,12h turn atheros card into master (AP) mode and configure new network 192.168.42.0/24 and setup masquarade: sudo sh -c "echo 1 > /proc/sys/net/ipv4/ip_forward" sudo wlanconfig ath0 destroy sudo wlanconfig ath0 create wlandev wifi0 wlanmode ap sudo iwconfig ath0 essid free4all sudo ifconfig ath0 192.168.42.1 sudo iwconfig sudo /etc/init.d/dnsmasq restart sudo iptables --flush sudo iptables --table nat --flush sudo iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE sudo iptables -A FORWARD -i eth0 -o ath0 -m state --state RELATED,ESTABLISHED -j ACCEPT sudo iptables -A FORWARD -i ath0 -o eth0 -j ACCEPT

And that's it. You have new 192.168.42.0/24 network on your wifi interface ath0 which is passed to eth0 (which you should configure beforehand using dhclient eth0 or someting similar). Bring wifi to every home in next year ;-)