eth1 - internet
wlan1 - internal network
Install programs:
apt-get install dhcp3-server hostapd iptables
Set wlan1 IP
ip link set dev wlan1 up
ip addr add 10.10.0.1/24 brd + dev wlan1
/etc/hostapd/hostapd.conf
interface=wlan1
bridge=br0
driver=nl80211
ssid=APname
hw_mode=b
channel=1
wpa=2
wpa_passphrase=password
wpa_key_mgmt=WPA-PSK
wpa_pairwise=TKIP CCMP
wpa_ptk_rekey=600
/etc/default/dhcp3-server