A. Flashing the TL-WR703N from original firmware
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The device can be reflashed using the web interface of the device.
As shipped from the factory, the web user interface is in Chinese language, but it is fairly easy to find the
firmware up load page. See screenshot file.

The SECN alpha firmware image to use to flash from factory firmware is:

openwrt-ar71xx-generic-tl-wr703n-v1-SN1_2-squashfs-factory.bin


1. Power the device up and connect a PC configured so it can see the device on its default IP address on 192.168.1.1
2. Point your web browser to this address to get the login page. Credentials are 'admin' and 'admin'
3. When you are logged in, select the last item from the menu on the left.
4. Select from the sub-menu items till you find the page for firmware upload.
   The URL is http://192.168.1.1/userRpm/SoftwareUpgradeRpm.htm  This is visible bottom left of screen.
   It will show a text box to specify the file to be uploaded. A screen shot is attached.
   Be careful as there is a similar page that is for uploading a saved configuration page.
5. Click on the button to the right of the text box to start the upgrade process and confirm when prompted.
6. The process takes a few minutes, then the device will restart (blue LED flashes).
7. After the device has restarted (the blue LED stops flashing and is steady on) you should be able to telnet to 192.168.1.1

B. Getting started
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1. Telnet to default address of 192.168.1.1
2. Set the root password and exit
3. SSH to 192.168.1.1
4. Edit /etc/config/network to set IP, gateway and dns so it can get to the internet through your LAN. 
Example file below.
5. Restart the box and ssh back in.
6. Run the following commands:
  # opkg update
  # opkg install webif
  # openssh-sftp-server
7. Point your browser to the device address to get the config page.
8. To browse to the file system from Nautilus (in Ubuntu)
    Select   Places/Connect to Server/
    Select SSH
    Enter IP of the TPLink device
    Enter Username 'root'
    Click Connect and enter root password when prompted

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# /etc/config/network

config 'interface' 'loopback'
    option 'ifname' 'lo'
    option 'proto' 'static'
    option 'ipaddr' '127.0.0.1'
    option 'netmask' '255.0.0.0'

config 'interface' 'lan'
    option 'ifname' 'eth0'
    option 'type' 'bridge'
    option 'proto' 'static'
    option 'ipaddr' '192.168.1.201'
    option 'netmask' '255.255.255.0'
    option 'dns' '8.8.8.8'
    option 'gateway' '192.168.1.254'