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Ingress filtering : ウィキペディア英語版 | Ingress filtering
In computer networking, ingress filtering is a technique used to ensure that incoming packets are actually from the networks from which they claim to originate. == Problem ==
Networks receive packets from other networks. Normally a packet will contain the IP address of the computer that originally sent it. This allows devices in the receiving network to know where it came from, allowing a reply to be routed back (amongst other things), except when IP addresses are used through a proxy or a spoofed IP address, which does not pinpoint a specific user within that pool of users. A sender IP address can be faked ('spoofed'), characterising a spoofing attack. This disguises the origin of packets sent, for example in a denial-of-service attack. The same holds true for proxies, although in a different manner than "IP Spoofing."
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Ingress filtering」の詳細全文を読む
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