share internet via WiFi

3g-wifi.sh

# Share ppp0 to wlan0

ifconfig wlan0 down

iptables --flush
iptables --table nat --flush
iptables --delete-chain
iptables --table nat --delete-chain

iwconfig wlan0 mode Ad-Hoc
iwconfig wlan0 essid 3g-WiFi
iwconfig wlan0 channel auto
iwconfig wlan0 key restricted 1234-5678-90
iwconfig wlan0 key on

ifconfig wlan0 up 192.168.0.254 netmask 255.255.255.0

echo 1 > /proc/sys/net/ipv4/ip_forward

################################################
# /etc/dnsmasq.conf

# domain-needed
# bogus-priv
# interface=wlan0
# dhcp-range=192.168.0.1,192.168.0.100,12h
#################################################

/etc/rc.d/dnsmasq restart

iptables -t nat -A POSTROUTING -o ppp0 -j MASQUERADE