Alternate way to setup a WiFi hotspot

1. install OS, setup basic configurations, update

2. install DHCP
CMD: sudo apt-get install hostapd isc-dhcp-server

3. configure DHCP
CMD: sudo nano /etc/dhcp/dhcpd.conf

*place a # in front of the two option domain-name entries and remove the # in front of authoritive

*at the end of the file enter the below

subnet 192.168.42.0 netmask 255.255.255.0 {
range 192.168.42.10 192.168.42.50;
option broadcast-address 192.168.42.255;
option routers 192.168.42.1;
default-lease-time 600;
max-lease-time 7200;
option domain-name "local";
option domain-name-servers 8.8.8.8,8.8.4.4;
}

*save and exit

4. edit server to work with wireless
CMD: sudo nano /etc/default/isc-dhcp-server

*find INTERFACES and change to:
INTERFACES="wlan0"

*save and exit

5. setup static ip for wireless
CMD: sudo nano /etc/network/interfaces

*edit code after allow-hotplug wlan0
iface wlan0 inet static
address 192.168.42.1
netmask 255.255.255.0

*put # in front of wpa roam after "iface wlan0 inet manual"

**you can also put a # in front of allow-hotplug wlan1 and lines associated to wlan1

*save and exit

6. set IP address for wlan0
CMD: sudo ifconfig wlan0 192.168.42.1

7. create WLAN
CMD: sudo nano /etc/hostapd/hostapd.conf

*enter code below

interface=wlan0
driver=nl80211
ssid="your ssid"
hw_mode=g
channel=1
macaddr_acl=0
auth_algs=1
ignore_broadcast_ssid=0
wpa=2
wpa_passphrase="your password"
wpa_key_mgmt=WPA-PSK
wpa_pairwise=TKIP
rsn_pairwise=CCMP

*save and exit

8. point hostapd to new file
CMD: sudo nano /etc/default/hostapd

*find line #DAEMON_CONF="" and edit as such and remove the #

DAEMON_CONF="/etc/hostapd/hostapd.conf"

*save ane exit

9. setup nat for multiple users
CMD: sudo nano /etc/sysctl.conf

*add to bottom of file

net.ipv4.ip_forward=1

*save and exit, then run by entering below

CMD: sudo sh -c "echo 1 > /proc/sys/net/ipv4/ip_forward"

10. nat between eth0 and wlan0
CMD: sudo iptables –t nat –A POSTROUTING –o eth0 –j MASQUERADE
CMD: sudo iptables –A FORWARD –i eth0 –o wlan0 –m state --state RELATED,ESTABLISHED –j ACCEPT
CMD: sudo iptables –A FORWARD -i wlan0 –o eth0 –j ACCEPT

*now to have them applied every reboot
CMD: sudo sh –c “iptables-save > /etc/iptables.ipv4.nat”

11. now go back to interfaces and add to the end of the file
CMD: sudo nano /etc/network/interfaces

up iptables-restore < /etc/iptables.ipv4.nat

*save and exit

12. setup daemon to run at boot

CMD: sudo service hostapd start
CMD: sudo service isc-dhcp-server start
CMD: sudo update-rc.d hostapd enable
CMD: sudo update-rc.d isc-dhcp-server enable

13. reboot and your done