Want to use Raspberry Pi as hotspot access point?
The following tested and verified on Raspbian Jessie.
1. Install dnsmasq and hostapd:
- sudo apt-get install dnsmasq hostapd
2. Ensure your wlan0 is enabled
- sudo nano /etc/network/interfaces
allow-hotplug wlan0
iface wlan0 inet manual
- sudo nano /etc/dhcpcd.conf
3. Give your wlan0 static IP.
- sudo nano /etc/dhcpcd.conf
interface wlan0
static ip_address=192.168.4.1/24
static routers=192.68.4.1
static domain_name_servers=192.168.1.1 8.8.8.8 #point it to your Internet router and use free Google DNS
4. Configure hostapd.
- sudo nano /etc/hostapd/hostapd.conf
- copy the following
driver=nl80211
ctrl_interface=/var/run/hostapd
ctrl_interface_group=0
auth_algs=1
wpa_key_mgmt=WPA-PSK
beacon_int=100
ssid=RPiHotSpot
channel=1
hw_mode=g
ieee80211n=1
wmm_enabled=1
ht_capab=[HT40][SHORT-GI-20][DSSS_CCK-40]
wpa_passphrase=susususu
interface=wlan0
wpa=2
wpa_pairwise=TKIP CCMP
country_code=AF
ignore_broadcast_ssid=0
5. Give your client appropriate IP addresses
- sudo nano /etc/dnsmasq.conf
interface=wlan0 # Use interface wlan0
bind-dynamic # Bind to the interface to make sure we aren’t sending things$
server=8.8.8.8 # Forward DNS requests to Google DNS
domain-needed # Don’t forward short names
bogus-priv # Never forward addresses in the non-routed address spaces$
dhcp-range=192.168.4.100,192.168.4.110,12h # Assign IP addresses between 172.24$
6. Now reboot. You should be able to connect to your new wifi hotspot: RPiHotSpot
password: susususu
7. Try ssh into it:
- ssh pi@192.168.4.1
Now you can share internet connection off your eth0 port.
8. Enable IP Forwarding.
- sudo nano /etc/sysctl
- uncomment this line: net.ipv4.ip_forward=1
9. Firewall and routing setup:
- sudo iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
- sudo iptables -A FORWARD -i eth0 -o wlan0 -m state –state RELATED, ESTABLISHED -j ACCEPT
- sudo iptables – A FORWARD -i wlan0 -o eth0 -j ACCEPT
- sudo sh -c “iptables-save > /etc/iptables.ipv4.nat”
- Enable after each boot, load it:
- sudo nano /etc/rc.local
- iptables-restore < /etc/iptables.ipv4.nat
10. Start evertyhing:
- sudo service dhcpd start
- sudo service hostapd start
- sudo service dnsmasq start
- sudo reboot now
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