Sharing internet

Creating a WiFi ad-hoc and routing through 3g modem

#/bin/bash

ifconfig wlan0 up

iwconfig wlan0 essid "PePeNeTe"

iwconfig wlan0 key "0123456789"

iwconfig wlan0 channel 11

ifconfig wlan0 192.168.1.1 netmask 255.255.255.0

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

iptables -A FORWARD -i wlan0 -o ppp0 -j ACCEPT

iptables -t nat -A POSTROUTING -s 192.168.1.0/24 -d 0.0.0.0/0 -j MASQUERADE

Creating a WiFi ad-hoc and routing through wired LAN

#!/bin/bash

iwconfig eth1 mode ad-hoc

iwconfig eth1 essid "PePeNeTe"

ifconfig eth1 up

ifconfig eth1 10.11.1.1 netmask 255.255.255.0

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

iptables -A FORWARD -i eth1 -o eth0 -j ACCEPT

iptables -t nat -A POSTROUTING -s 10.11.1.0/24 -d 0.0.0.0/0 -j MASQUERADE