| 摘要 |
The present invention relates to an access permission method of a security device by using a virtual private network (VPN). The access permission method of a security device comprises the steps of: inputting a packet through a network; forwarding the received packet if the inputted packet is not a server packet; decoding the inputted packet and including marking data to re-input a packet with the marking data, if the inputted packet is a server packet and a VPN packet; checking if the marking data is included if the inputted packet is a server packet; processing the packet with the marking data and disposing of a packet which does not include the marking data; and transmitting the processed packet to an application program. Therefore, provided are the security device capable of minimizing the exposure of a packet to the outside when a device has an access through a network and preventing an access of a device which has not been permitted to have an access, and the access permission method thereof. |
