View source for Raspberry Pi as a Hotspot

= configure wlan =
Assign an IP address to NIC
<pre>
vi /etc/network/interfaces
</pre>

add
<pre>
auto wlan0
</pre>

Remark the following lines so the wlan never acts as a client
<pre>
#allow-hotplug wlan0
#wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf
#iface default inet manual
</pre>

Assin an IP address to wlan0
<pre>
iface wlan0 inet static
address 10.11.12.1
netmask 255.255.255.0
wireless-mode Master
</pre>

= dhcp =
Setup DHCP Scope
<pre>
apt-get install isc-dhcp-server
</pre>

<pre>
vi /etc/dhcp/dhcpd.conf
</pre>

The following is based on your requirements.
<pre>
# option definitions common to all supported networks...
#option domain-name "example.org";
#option domain-name-servers ns1.example.org, ns2.example.org;
</pre>

<pre>
subnet 10.11.12.0 netmask 255.255.255.0 {
    range 10.11.12.101 10.11.12.120;
    option broadcast-address 10.11.12.255;
}
</pre>


<pre>
vi /etc/dhcp/dhcpd.conf 
</pre>

Bind DHCP to wlan interface
<pre>
vi /etc/default/isc-dhcp-server
</pre>
Change
<pre>
INTERFACES=""
</pre>
to
<pre>
INTERFACES="wlan0"
</pre>

= hostapd = 
As I have the RTL8188CUS wireless chipset I needed to download a specific version of the hostapd application.  Other wireless network cards you could try using the distro package
<pre>
apt-get install hostapd 
</pre>

'''otherwise'''

<pre>
cd /usr/src
wget https://github.com/jenssegers/RTL8188-hostapd/archive/master.zip
unzip master.zip
cd RTL8188-hostapd-master/hostapd/
make
make install
</pre>

<pre>
vi /etc/hostapd/hostapd.conf
</pre>

Configure the following paramaters as required
<pre>
ssid=
channel=
wpa_passphrase=
</pre>

= NAT =
In my config I have not configured port forwarding and NAT.  For my application here I am using the Raspberry Pi with SMB shares so the kids can access TV shows and movies from their android tables in the car so NAT is not required.  This also why I have not configure a gateway or name servers in the DHCP server. I may add the NAT details at a later time.

[[Category : Raspberry Pi]] [[Category : Linux]]