PROBLEM TO BE SOLVED: To protect a relay device from DoS attacks while reducing a communication load on a transfer unit even if the relay device suffers the DoS attacks.SOLUTION: When a router included in a relay device receives a frame at its respective ports, it determines whether the frame is a session request (S110). If the received frame is a session request, the router determines whether the router is in a prohibition state (S130). If it is in the prohibition state, it discards the frame (S140). If it is not in the prohibition state, it determines whether it is in a determination state (S150), moves to the prohibition state (S170) only for a prohibition time set by a setting unit if it is in the determination state, and discards the frame.SELECTED DRAWING: Figure 2

    【課題】中継装置がDoS攻撃を受けた場合にも、転送部に係る通信負荷を軽減しつつ、DoS攻撃を防ぐ。【解決手段】中継装置を構成するルータは、それぞれのポートでフレームを受信した場合に、そのフレームがセッション要求であるか否か判断(S110)する。受信したフレームがセッション要求であった場合には、禁止状態であるか否かを判定する(S130)。禁止状態であった場合には、フレームを破棄する(S140)。禁止状態でなかった場合には、判定状態であるか否かを判定(S150)し、判定状態であった場合には設定部により設定された禁止時間だけ、禁止状態に移行(S170)し、フレームの破棄を行う。【選択図】図2


    Access

    Download


    Export, share and cite



    Title :

    COMMUNICATION SYSTEM AND RELAY DEVICE


    Additional title:

    通信システム及び中継装置


    Contributors:

    Publication date :

    2018-08-30


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION , Übertragung digitaler Information, z.B. Telegrafieverkehr / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR



    RELAY COMMUNICATION DEVICE, HANGAR, CONTROL SYSTEM AND RELAY COMMUNICATION METHOD

    RAO XIONGBIN / YIN XIAOJUN / WANG NAIBO | European Patent Office | 2021

    Free access

    RELAY DEVICE AND COMMUNICATION SYSTEM

    KANAMORI TSUBASA | European Patent Office | 2016

    Free access

    VEHICLE-MOUNTED COMMUNICATION SYSTEM, RELAY DEVICE, AND RELAY METHOD

    OTSU TOMOHIRO / HAGIHARA TAKESHI / URAYAMA HIROFUMI et al. | European Patent Office | 2024

    Free access

    COMMUNICATION RELAY DEVICE

    KANEKO HISAFUMI / NAKAO NOBUHIKO / SHIDA HIRONORI | European Patent Office | 2019

    Free access

    VEHICLE-MOUNTED COMMUNICATION SYSTEM, RELAY DEVICE, AND RELAY METHOD

    OTSU TOMOHIRO / HAGIHARA TAKESHI / URAYAMA HIROFUMI et al. | European Patent Office | 2022

    Free access