ubuntu12.04设置wifi热点给Android设备

浅浅的花香味﹌ 2022-09-24 10:27 180阅读 0赞

Original Article Link: [http://forum.xda-developers.com/showthread.php?t=2009381][http_forum.xda-developers.com_showthread.php_t_2009381]

As many of you know, most of our android(not only android) devices can't connect to ad hoc hotspots. There's a solution for win7/8 users to set up infrastructure hotspot on their laptop using software like connectify and so on. Ubuntu also allows to create wifi hotspot to share internet, but it will be ad hoc one.

So here's the guide how to set up infrastructure hotspot on ubuntu 12.04/12.10. Unlike some other methods described on the internet, this one will not break default network manager.  
  
1. First of all you should make sure, that your wifi adapter supports infrastructure hotspots. If you used connectify on your windows system and it worked, skip this step.  
  
open terminal and type:  sudo lshw | less  
  
find -network section and make sure that driver is ath5k or ath9k, this solution will only work for those drivers, but should fit the needs for the most laptop users.  
  
  
  
2. We now need to install 2 additional tools to make out hotspot, 1st one is hostapd(hotspot server), 2nd one is dnsmasq(dns dhcp server)  
  
in terminal type:  sudo apt-get install hostapd dnsmasq  
  
3. stop those services if started already, and prevent them from starting on system start up.  
  
in terminal type:   
sudo service hostapd stop  
sudo service dnsmasq stop  
sudo update-rc.d hostapd disable  
sudo update-rc.d dnsmasq disable  
  
4. Now we need to set up config files.   
in terminal type:  sudo gedit /etc/dnsmasq.conf  
or  sudo kate /etc/dnsmasq.conf  if you use kde  
  
add those lines to the config file

Code:

# Bind to only one interface
    bind-interfaces
    # Choose interface for binding
    interface=wlan0
    # Specify range of IP addresses for DHCP leasses
    dhcp-range=192.168.150.2,192.168.150.10

5. hostapd config  
  
in terminal type:  sudo gedit /etc/hostapd.conf  
  
and add those lines

Code:

# Define interface
    interface=wlan0
    # Select driver
    driver=nl80211
    # Set access point name
    ssid=myhotspot
    # Set access point harware mode to 802.11g
    hw_mode=g
    # Set WIFI channel (can be easily changed)
    channel=6
    # Enable WPA2 only (1 for WPA, 2 for WPA2, 3 for WPA + WPA2)
    wpa=2
    wpa_passphrase=mypassword

You can change ssid name and password for anything you want here. Current config will create hotspot named myhotspot with mypassword password.  
  
6. Now create anywhere you want a file named start.sh  
edit it with any text editor like this:

Code:

#!/bin/bash
    # Start
    # Configure IP address for WLAN
    sudo ifconfig wlan0 192.168.150.1
    # Start DHCP/DNS server
    sudo service dnsmasq restart
    # Enable routing
    sudo sysctl net.ipv4.ip_forward=1
    # Enable NAT
    sudo iptables -t nat -A POSTROUTING -o ppp0 -j MASQUERADE
    # Run access point daemon
    sudo hostapd /etc/hostapd.conf
    # Stop
    # Disable NAT
    sudo iptables -D POSTROUTING -t nat -o ppp0 -j MASQUERADE
    # Disable routing
    sudo sysctl net.ipv4.ip_forward=0
    # Disable DHCP/DNS server
    sudo service dnsmasq stop
    sudo service hostapd stop

You will probably need to change ppp0 in this to eth0 (or any other number which refers to your wired connection.  
  
7. Last step. Now you can start your hotspot by starting our script. just run it using  sudo sh  
for me it looks like this  sudo sh /home/ogyct/Desktop/start.sh  because I have it on my desktop

[http_forum.xda-developers.com_showthread.php_t_2009381]: http://forum.xda-developers.com/showthread.php?t=2009381