Create a Wifi Access Point

Source: https://thepi.io/how-to-use-your-raspberry-pi-as-a-wireless-access-point/

• First install hostapd and dnsmasq

  sudo apt-get install hostapd
  sudo apt-get install dnsmasq
  

• Stop both services

sudo systemctl stop hostapd
sudo systemctl stop dnsmasq

• Configure Statis IP for Wlan0 interface

  sudo nano /etc/dhcpcd.conf
  

• Write the following at the end of the file

  interface wlan0
  static ip_address=192.168.0.10/24
  denyinterfaces eth0
  denyinterfaces wlan0
  

• Configure DHCP Server

  sudo mv /etc/dnsmasq.conf /etc/dnsmasq.conf.orig
  sudo nano /etc/dnsmasq.conf
  

• Write the following in the file

  interface=wlan0
  dhcp-range=192.168.0.11,192.168.0.30,255.255.255.0,24h
  

• Configure the access point host software (hostapd)

  sudo nano /etc/hostapd/hostapd.conf
  

• Write the following in the file

  interface=wlan0
  hw_mode=g
  channel=7
  wmm_enabled=0
  macaddr_acl=0
  auth_algs=1
  ignore_broadcast_ssid=0
  wpa=2
  wpa_key_mgmt=WPA-PSK
  wpa_pairwise=TKIP
  rsn_pairwise=CCMP
  ssid=NETWORK
  wpa_passphrase=PASSWORD
  

• Show the system the location of the file

  sudo nano /etc/default/hostapd
  

• Write the following to the file

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

• I had problems starting the services hostapd and I follow the instructions of this link running the following commands it worked… I also run something of the ip_tables but I do not know if it was related.

  sudo systemctl unmask hostapd
  sudo systemctl enable hostapd
  sudo systemctl start hostapd