Abstract:
An apparatus for displaying a network state by using a flow-n-rectangular and a method thereof are provided to determine an abnormal state of the network which degrades its performance and to detect harmful or abnormal traffic causing the abnormal state of the network by using simple data which can show abnormal features of the traffic like flow rates of each port section in accordance with connected time, octet rates, or packet rates. An apparatus for displaying a network state by using a flow-n-rectangular comprises a traffic feature extractor(110), a traffic state displayer(120) and a traffic abnormality checker(130). The traffic feature extractor(110) calculates an occupation rate in accordance with traffic features generated according to a certain reference port and time by referring to traffic information collected by an external traffic information collector, and stores the calculated result. The traffic state displayer(120) expresses an abnormal state of the current network through one and more regular tetragons displayed by using the occupation rate in accordance with traffic features of a port under a reference port, a port over the reference port, a flow over a reference time, and a flow under the reference time on an occupation rate coordinate plane by referring to the calculated result stored in the traffic feature extractor(110). The traffic abnormality checker(130) determines an abnormal state of the network according to the position or size of a regular tetragon drawn on the occupation rate coordinate plane, detects and reports the type of an abnormal state and harmful or abnormal traffic if the abnormal state occurs.
Abstract:
A method for displaying event information related to network security is provided to enable a user to visually analyze change of a quantity and connectivity of events of a specific attribute among the events related to the network security, and intuitively recognize a current security situation. The network-related events generated in a managed domain of the network are collected(110). Information including a generation quantity of each application port, the connectivity between a source and destination address, a source and destination address, and an event type to be expressed as a graphic is extracted from the collected event(151,161). The extracted information is displayed as the graphic according to the source and destination address, and interconnectivity among the event types(152,162). An abnormal security state of the managed domain is determined according to a pattern of the displayed graph(170).
Abstract:
본 발명에 의한 네트워크 공격상황 탐지 장치는 접속하고 있는 네트워크의 경보를 수신한 후 소정의 경보 데이터로 가공하여 출력하는 경보수신부; 상기 가공된 경보 데이터의 속성 및 발생 빈도를 기초로 상기 네트워크의 공격상황을 분석하는 경보처리부; 상기 네트워크의 상황을 분석할 수 있는 기본 데이터를 유지하며 상기 경보처리부에 제공하는 메모리부; 및 외부 장치로 상기 분석 결과를 송신하고 상기 공격상황의 판단시 기초가 되는 소정의 임계치를 수신한 후 상기 경보처리부로 출력하여 상기 메모리부에 저장하도록 하는 인터페이스부;를 포함하는 것을 특징으로 하며, 네트워크의 경보를 처리하기 위한 해쉬 엔진과 탐지 엔진을 네트워크 공격 상황으로 분류한 데이터 집합과 동일한 수로 병렬 구성함으로써, 네트워크의 공격 상황을 방대한 양의 침입 탐지 경보로부터 실시간으로 탐지해낼 수 있다. 네트워크 공격상황 분석, 침입탐지 경보 연관성 분석, 고성능 공격상황 탐지
Abstract:
PURPOSE: A method for blocking a cracker of an ISP(Internet Service Provider) border router by packet filtering and a system therefor are provided to disconnect an unlawful trespass traffic inputted through the border router of an ISP network by analyzing pattern and isolate the cracker from the network. CONSTITUTION: If packet data are inputted through a network, a sampling unit samples the packet data(S1). A traffic pattern analyzing unit judges whether many packet data are generated within a short time(S2). If many packet data are generated within the short time, the traffic pattern analyzing unit analyzes a traffic pattern(S3). An unlawful packet judging unit judges whether the corresponding packet data go toward an unlawful source IP(Internet Protocol) address or the same destination IP address(S4). If the corresponding packet data go toward the unlawful source IP address or the same destination IP address, the unlawful packet judging unit decides the corresponding packet data as unlawful packet data(S5). A packet filter filters the unlawful packet data(S6). The packet filter forwards lawful packet data except for the unlawful packet data to a destination IP address(S7).
Abstract:
네트워크의 변동성과 참여자의 중요도를 반영하여 도메인 참여자 발견 메시지의 주기를 조절하도록 하는 참여자 발견 메시지 주기 결정 방법 및 장치를 제시한다. 제시된 장치는 참여자의 도메인 탈퇴율을 근거로 네트워크 안정율을 계산하는 네트워크 안정율 계산부, 네트워크 안정율을 근거로 네트워크 상태 변화에 따른 참여자 발견 메시지 주기를 계산하는 ANPP(Adapted_Network_PDP_Period) 계산부, 기설정된 참여자 우선순위를 해석하는 우선순위 해석부, 및 네트워크 상태 변화에 따른 참여자 발견 메시지 주기 및 참여자 우선순위를 근거로 참여자 발견 메시지 주기를 결정하는 참여자 발견 메시지 주기 결정부를 포함한다.