TP-LINK TD-W8968 - Configuration as a router, secure the WIFI and change modem administration password

Configuration procédure, step by step, by video in less than 4 minutes, of the wireless modem TP-LINK TD-W8968 (v2, v3 and v4) as a Router, how to secure the wireless and  how to change default modem administrator password to protect your modem...

TP-LINK TD-W8968 v2 description:

TP-LINK’s 300Mbps Wireless N USB ADSL2+ Modem Router TD-W8968 is an incredibly robust all-in-one device allowing users to port and share it wirelessly at 300Mbps wireless 802.11n speeds.
With its multi-function USB port, users can share printers, files, 3G Modem, and play media across the local network or access files from attached USB storage across the internet using the access high-speed internet connection via ADSL, 3G Modem or Ethernet WAN (EWAN) using its interchangeable LAN/WAN TD-W8968’s FTP server function.
Moreover, it supports the latest Internet Protocol IPv6 to future-proof your network.

Features：

High speed DSL modem, NAT router and wireless access point in one device providing a one-stop networking solution.
Wireless N speed up to 300Mbps makes it ideal for heavy bandwidth consuming or interruption sensitive applications like online gaming, Internet calls and even the HD video streaming.
Guest Network Access provides secure Wi-Fi access for guests sharing your home or oce network.
USB Port for Storage Sharing, Printer Sharing, 3G Modem Sharing, FTP Server and Media Server.
Supports the latest Internet Protocol IPv6 to future-proof your network.
And more...