Repeater, repeating method, repeating program, and network attack defending system
AssigneeNippon Telegraph and Telephone Corporation
InventorsKatsuhiro Sebayashi, Hiroshi Kurakami, Yuji Soejima, Eric Chen, Hitoshi Fuji
Life of this patent
Estimating the term…
Abstract
A repeater device receives from a first repeater device, which is adjacent to the repeater device on a network, a signature for controlling passage of a packet through the repeater device and determines whether to send the received signature to a second repeater device, which is adjacent to the repeater device on the network, based on contents of the received signature, and sends the received signature to the second repeater device when determining that the received signature is to be sent to the second repeater device.
Claims27
1-26. (canceled)
A repeater device that receives from a first repeater device, which is adjacent to the repeater device on a network, a signature for controlling passage of a packet through the repeater device and sends received signature to a second repeater device, which is adjacent to the repeater device on the network, wherein the repeater device
- determines whether to send the received signature to the second repeater device based on contents of the received signature;
- and
- sends the received signature to the second repeater device when determining that the received signature is to be sent to the second repeater device.
A network attack protection system including a plurality of repeater devices on a network, a repeater device from among the repeater devices receives from a first repeater device, which is adjacent to the repeater device on the network, a signature for controlling passage of a packet through the repeater device and sends received signature to a second repeater device, which is adjacent to the repeater device on the network, wherein the repeater device includes
- an attack determining unit that determines whether a packet passing through the repeater device satisfies a condition specified in the received signature to thereby determine whether there is an attack on the repeater device;
- and
- a signature sending unit that sends the received signature to the second repeater device upon the attack determining unit determining that there is an attack on the repeater device.
A relaying method performed by a repeater device from among a plurality of repeater devices on a network, the relaying method comprising:
- receiving from a first repeater device, which is adjacent to the repeater device on the network, a signature for controlling passage of a packet through the repeater device;
- determining whether a packet passing through the repeater device satisfies a condition specified in the signature received at the receiving to thereby determine whether there is an attack on the repeater device;
- and
- sending the signature received at the receiving to the second repeater device upon it is determined at the determining that there is an attack on the repeater device.
A computer-readable recording medium that stores therein a computer program that causes a computer to function as a repeater device from among a plurality of repeater devices on a network, the computer program causing the repeater device to execute:
- receiving from a first repeater device, which is adjacent to the repeater device on the network, a signature for controlling passage of a packet through the repeater device;
- determining whether a packet passing through the repeater device satisfies a condition specified in the signature received at the receiving to thereby determine whether there is an attack on the repeater device;
- and
- sending the signature received at the receiving to the second repeater device upon it is determined at the determining that there is an attack on the repeater device.
Dependencies are inferred from the claim text.