Network filtering device, network filtering method and computer-readable recording medium having stored therein a program
AssigneeFujitsu Limited
InventorsHisashi Kojima, Masahiro Nakada
Life of this patent
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Abstract
Provided is effective protection of a machine which is connected to a network by including a monitoring unit configured to monitor an apparatus which receives a data packet through a network, a storage unit configured, when abnormality of the apparatus is detected, to store a first data packet which causes the abnormality, a comparison unit configured to compare a second data packet received by the apparatus and the first data packet, a specification unit configured to specify a portion in the first data packet which is changed by a threshold or more from the second data packet, and a registration unit configured to register data of the specified portion.
Claims6
A network filtering device comprising:
- a monitoring unit configured to monitor an apparatus which receives a data packet through a network;
- a storage unit configured, when abnormality of the apparatus is detected, to store a first data packet which causes the abnormality;
- a comparison unit configured to compare a second data packet received by the apparatus and the first data packet;
- a specification unit configured to specify a portion in the first data packet which is changed by a threshold or more from the second data packet;
- and
- a registration unit configured to register data of the specified portion.
A network filtering method comprising:
- monitoring an apparatus which receives a data packet through a network;
- storing, when abnormality of the apparatus is detected, a first data packet which causes the abnormality;
- comparing a second data packet received by the apparatus and the first data packet;
- specifying a portion in the first data packet which is changed by a threshold or more from the second data packet;
- and
- registering data of the specified portion.
A computer-readable recording medium having stored therein a program for causing a computer to execute a network filtering process comprising:
- monitoring an apparatus which receives a data packet through a network;
- storing, when abnormality of the apparatus is detected, a first data packet which causes the abnormality;
- comparing a second data packet received by the apparatus and the first data packet;
- specifying a portion in the first data packet which is changed by a threshold or more from the second data packet;
- and
- registering data of the specified portion.
Dependencies are inferred from the claim text.