1. Buffallo WEX-733DHP
2. IO-Data WN-G300EXP

1. Find the MAC address of your extender.
   1. Use VPN Hotspot on an Android device and turn on Repeater mode.
   2. Connect the WiFi hotspot.
   3. You will find the MAC Address of the extender.
   4. Note: an extender has two MAC addresses; one as a server and the other as a client.
2. Open 192.168.11.100.
   1. Set up the extender SSID and its password.
   2. Make a connection to the 1st WiFi station.

1. WN-G300EXP-1 Ikyoku 36:76:c5:8e:16:a8
2. WN-G300EXP-2 Ikyoku 36:76:c5:5e:03:8e
IKYOKU-AP: ikyokukanri

1. connect to the Parent Wi-Fi. eg. Ikyoku

     #    SSID            BSSID                       encrypt               %
      ----------------------------------------------------------------------------
     13 ITW_WLAN 20:A6:CD:7B:4B:00 WPA2-PSK(AES) 91   <- strong!
   

2. change the SSID.
you need to find the assigned IP address of the WN-G300EXP.

The best way to do that;

0. boot ubuntu.
1. show ap mac address: $ iwconfig wlp2s0
2. Connect to wireless AP by MAC address: $ iwconfig wlp2s0 ap 34:76:c5:8e16:a8
   $ ip link set wlan0 down
   $ ip link set wlan0 up
   
3. nmap -sP 172.30.0.0/22 # 0, 1, 2, 3 are belonging to one network.

old:
  assume assinged address 172.16.1.199 with network address; 255.255.252.0.
0. boot ubuntu. use the small-dongle. nmap will be needed to install. 
0. the list of wifi ssid: $ nmcli dev wifi
1. bc
    obase=2
    252
    11111100
    40
    00101000
    41
    00101001
    42
    00101001
    43
    00101001

2. nmap -sP 172.31.40.0/24 ; nmap -sP 172.31.41.0/24 ; nmap -sp ; nmap -sP 172.31.42.0/24 ; nmap -sp ; arp -a | grep "34:76:c5:8e:16:a8*

    
2. nmap -sP 172.16.0.0/24 ; nmap -sP 172.16.1.0/24 ; nmap -sp ; nmap -sP 172.16.2.0/24 ; nmap -sp ; arp -a | grep "34:76:c5:5e:03:8e*
note: the target mac address 34:76:c5:5e:03:8e
3. http://172.16.1.169/   not https://
Note: try a couple of times of 2, if it does not work at the first time.

Do-NOTs:
1. change SSID first --> then NO DHCP works anymore.

How to Spoof MAC address by ubuntu. (if you need to login via a browser)

The extender can not show a login page, thus you need to complete a login via ubuntu by spoofing the MAC address.

Login for the two extenders:

• 36:76:C5:8E:16:A8(IO) / 34:76:C5:8E:16:A8(IO)
• 84:AF:EC:08:09:E6 (Bf) / 84:AF:EC:58:09:E6

Original Mac Address on wifi card on Ubuntu: 5C:E0:C5:28:EA:47.

1. GUI
   1. Top-Right -> Wifi Settings -> select ssid -> push "wheel" button.
   2. tap identity button -> clone id -> type the mac address.
   3. $ ifconfig to find it has been changed.
2. Command Line
   1. $ sudo ip link set wlp3s0 down
   2. $ sudo ip link set wlp3s0 address 36:76:C5:8E:16:A8(IO) / 84:AF:EC:08:09:E6 (Bf)
   3. $ sudo ip link set wlp3s0 up
   4. $ iwconfig # find the mac address has been changed.
   5. $ sudo ifconfig wlp3s0 172.30.2.254/22 # set the ip address
   6. $ sudo route add -net 172.30.0.0 netmask 255.255.252.0 wlp3s0
   7. $ sudo route add default gw 172.30.0.1

Now Spoof is done!

1. plug off the extender. (you have two devices with the same MAC address on a ssid network.)
2. login via ubuntu.
3. wifi off and reconnect your wifi extender again.