Press the [Menu] key.
Press the [][] keys to select [Host Interface], and then press the [OK] key.
Press the [][] keys to select [Network Setting], and then press the [OK] key.
Press the [][] keys to select [IPsec], and then press the [OK] key.
Press the [][] keys to select [On] or [Off], and then press the [OK] key.
Press the [Menu] key to return to the initial screen.
You can press the [Escape] key to exit to the previous level of the menu tree.