Difference between revisions of "How to configure a wlan interface on hotspot mode"

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1 Configure a wlan interface on hotspot mode[edit]

  • Configure the wlan interface for systemd/netword

Add the following rule on /lib/systemd/network/ 

 cat /lib/systemd/network/hostapd.network
[Match]
Name=wlan0

[Network]
Address=192.168.72.1/24
DHCPServer=yes
IPForward=ipv4
IPMasquerade=yes

192.168.72.1/24: ip address affected to the hotspot device.

This configuration supports dhcpserver, ip forward and ip masquerade for this wlan interface: wlan0.

  • Create the hotspot configuration by replacing /etc/hostapd.config content by the following lines
 cat /etc/hostapd.conf
interface=wlan0
driver=nl80211
# mode Wi-Fi (a = IEEE 802.11a, b = IEEE 802.11b, g = IEEE 802.11g)
hw_mode=g
ssid=STExampleNetwork
channel=7
wmm_enabled=0
macaddr_acl=0
# Wi-Fi closed, need an authentication
auth_algs=1
ignore_broadcast_ssid=0
wpa=2
wpa_passphrase=ExamplePassphareNetwork
wpa_key_mgmt=WPA-PSK
wpa_pairwise=TKIP
rsn_pairwise=CCMP

STExampleNetwork is the visible name of the new wlan hotspot (SSID).

ExamplePassphareNetwork is the passphare associated to the wlan hotspot (SSID).

  • Correct one issue with systemd-networkd.service which does not enable the wifi link by default

Add the highlighted line in /lib/systemd/system/hostapd.service file 

 cat /lib/systemd/system/hostapd.service
[Service]
ExecStartPre=/sbin/ip link set wlan0 up
ExecStart=/usr/sbin/hostapd /etc/hostapd.conf -P /run/hostapd.pid -B
  • Enable systemd service
 systemctl enable  hostapd

2 How to configure a gateway configuration[edit]

For this example of configuration, the setup is:

  • wlan0: wireless interface connected to SSID_NETWORK with DHCP
  • eth0: ethernet interface with static IP which also have a DHCPserver on it
  • forward of packet are activated between the two network interfaces.

2.1 Configure wireless interface[edit] 

 cat /lib/systemd/network/wlan0.network
 [Match]
 Name=wlan0
  
 [Network]
 DHCP=ipv4
 IPForward=ipv4
IPForward
permit to forward all network packet from wireless network to other network.


Configure wireless interface for SSID_NETWORK network: 

 mkdir -p /etc/wpa_supplicant/
 echo "ctrl_interface=/var/run/wpa_supplicant" > /etc/wpa_supplicant/wpa_supplicant-wlan0.conf
 echo "eapol_version=1" >> /etc/wpa_supplicant/wpa_supplicant-wlan0.conf
 echo "ap_scan=1" >> /etc/wpa_supplicant/wpa_supplicant-wlan0.conf
 echo "fast_reauth=1" >> /etc/wpa_supplicant/wpa_supplicant-wlan0.conf
 echo "" >> /etc/wpa_supplicant/wpa_supplicant-wlan0.conf
 wpa_passphrase SSID_NETWORK PASSWORD_NETWORK >> /etc/wpa_supplicant/wpa_supplicant-wlan0.conf
 or
 wpa_passphrase SSID_NETWORK  >> /etc/wpa_supplicant/wpa_supplicant-wlan0.conf

Where SSID_NETWORK PASSWORD_NETWORK correspond to the SSID and password of wireless network.

Enable the wireless configuration (to be take into account after reboot): 

 systemctl enable wpa_supplicant@wlan0.service
         systemctl restart systemd-networkd.service
         systemctl restart wpa_supplicant@wlan0.service



<noinclude>

{{ArticleMainWriter | ChristopheR}}
{{ArticleApprovedVersion | ChristopheR | AlexandreT, GeraldB, LudovicB, LoicP | No previous approved version | AlainF - 07Jan'19 - 10176 | 21Jan'19}}
[[Category:WLAN]]</noinclude>

== Configure a wlan interface on hotspot mode ==
* Configure the wlan interface for systemd/netword
Add the following rule on /lib/systemd/network/
 {{Board$}} cat /lib/systemd/network/hostapd.network
 [Match]
 Name=wlan0

 [Network]
 Address='''192.168.72.1/24'''
 DHCPServer=yes
 IPForward=ipv4
 IPMasquerade=yes
'''192.168.72.1/24''': ip address affected to the hotspot device.

This configuration supports dhcpserver, ip forward and ip masquerade for this wlan interface: wlan0.

* Create the hotspot configuration by replacing /etc/hostapd.config content by the following lines
 {{Board$}} cat /etc/hostapd.conf
 interface=wlan0
 driver=nl80211
 # mode Wi-Fi (a = IEEE 802.11a, b = IEEE 802.11b, g = IEEE 802.11g)
 hw_mode=g
 ssid='''STExampleNetwork'''
 channel=7
 wmm_enabled=0
 macaddr_acl=0
 # Wi-Fi closed, need an authentication
 auth_algs=1
 ignore_broadcast_ssid=0
 wpa=2
 wpa_passphrase='''ExamplePassphareNetwork'''
 wpa_key_mgmt=WPA-PSK
 wpa_pairwise=TKIP
 rsn_pairwise=CCMP
'''STExampleNetwork''' is the visible name of the new wlan hotspot (SSID).<br />


'''ExamplePassphareNetwork''' is the passphare associated to the wlan hotspot (SSID).

* Correct one issue with systemd-networkd.service which does not enable the wifi link by default
Add the highlighted line in /lib/systemd/system/hostapd.service file
 {{Board$}} cat /lib/systemd/system/hostapd.service
 [Service]
 '''ExecStartPre=/sbin/ip link set wlan0 up'''
 ExecStart=/usr/sbin/hostapd /etc/hostapd.conf -P /run/hostapd.pid -B

* Enable systemd service
 {{Board$}} systemctl enable  hostapd

==How to configure a gateway configuration==

For this example of configuration, the setup is:
* wlan0: wireless interface connected to SSID_NETWORK with DHCP
* eth0: ethernet interface with static IP which also have a DHCPserver on it
* forward of packet are activated between the two network interfaces.

===Configure wireless interface===

 {{Board$}} cat /lib/systemd/network/wlan0.network
  [Match]
  Name=wlan0

  [Network]
  DHCP=ipv4
  IPForward=ipv4

;IPForward
: permit to forward all network packet from wireless network to other network.
<br/>

Configure wireless interface for SSID_NETWORK network:

 {{Board$}} mkdir -p /etc/wpa_supplicant/
  echo "ctrl_interface=/var/run/wpa_supplicant" > /etc/wpa_supplicant/wpa_supplicant-wlan0.conf
  echo "eapol_version=1" >> /etc/wpa_supplicant/wpa_supplicant-wlan0.conf
  echo "ap_scan=1" >> /etc/wpa_supplicant/wpa_supplicant-wlan0.conf
  echo "fast_reauth=1" >> /etc/wpa_supplicant/wpa_supplicant-wlan0.conf
  echo "" >> /etc/wpa_supplicant/wpa_supplicant-wlan0.conf
  wpa_passphrase SSID_NETWORK PASSWORD_NETWORK >> /etc/wpa_supplicant/wpa_supplicant-wlan0.conf
  or
  wpa_passphrase SSID_NETWORK  >> /etc/wpa_supplicant/wpa_supplicant-wlan0.conf

Where '''SSID_NETWORK''' '''PASSWORD_NETWORK''' correspond to the SSID and password of wireless network.<br/>
<br/>

Enable the wireless configuration (to be take into account after reboot):

 {{Board$}} systemctl enable wpa_supplicant@wlan0.service
          systemctl restart systemd-networkd.service
          systemctl restart wpa_supplicant@wlan0.service

<noinclude>

[[Category:WLAN]]
{{PublicationRequestId | 10176 | 2019-01-07 | AlainF}}</noinclude>
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{{ArticleMainWriter | ChristopheR}}
  
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{{ArticleApprovedVersion | ChristopheR | AlexandreT, GeraldB, LudovicB, LoicP | No previous approved version | AlainF - 07Jan'19 - 10176 | 21Jan'19}}
  
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[[Category:WLAN]]
  
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== Configure a wlan interface on hotspot mode ==
  
== Configure a wlan interface on hotspot mode ==
 
* Configure the wlan interface for systemd/netword
  
* Configure the wlan interface for systemd/netword
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           systemctl restart systemd-networkd.service
  
           systemctl restart systemd-networkd.service
 
           systemctl restart wpa_supplicant@wlan0.service
  
           systemctl restart wpa_supplicant@wlan0.service
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<noinclude>
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[[Category:WLAN]]
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{{PublicationRequestId | 10176 | 2019-01-07 | AlainF}}
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