| 摘要 |
<p>The invention relates to a device (10) for automatically controlling access between a local area network (14, 40, 60) and a wide area network (18, 44), which device comprises a switch (20) which is positioned between the local area network and the wide area network to disconnect the local area network from the wide area network. The switch is further arranged to be automatically controlled based on a system-generated input signal, which signal indicates the expected need for access between the local area network and the wide area network the device being adapted to keep the switch disconnected when the input signal indicates that no need for access between the local area network and the wide area network is expected. Thus, the time during which the local area network is connected to the wide area network, and consequently the time during which the local area network is vulnerable to outside attacks, can be significantly reduced. The invention also relates to a method for automatically controlling access between a local area network and a wide area network.</p> |
