SYSTEM AND METHOD FOR NGS USING DYNAMIC TELNET PORT

摘要

PURPOSE: A system and a method for an NGS(Network Guard System) using a dynamic Telnet port are provided to interrupt an access to a server from the outside at a network by using an ephemeral port allocated by a kernel as the Telnet port and to effectively confront the system recovery in the shortest time when a fatal trouble due to a mistake of a user is occurred. CONSTITUTION: Permission is decided by receiving an access request from an external terminal(501,502). If the permission is refused, the connection is rejected. If the permission process is terminated, a certification password is allotted(504). The certification password is inputted(505), and logging is started(509). The external terminal logs in to a target host(508) and logging is terminated(510).