June 2016
Beginner to intermediate
376 pages
8h 58m
Japanese
Content preview from データ分析によるネットワークセキュリティ
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5.3
出力フィールドの選択およびフォーマット操作：
rwcut
75
README-S0.txt in out silk.conf
README-S1.txt inweb outweb
$ ls in/2005/01/07/*.01
in/2005/01/07/in-S0_20050107.01 in/2005/01/07/in-S1_20050107.01
データ収集時には、SiLK はデータをサブディレクトリに分割し、トラフィックの種類とイベント
発生時間でトラフィックを分割する。これによりスケーラブルになり分析が高速化する。しかしこの
方法だとブラックボックスになってしまうので、ここでは取り扱うファイルを明示する。以下の4 つ
の具体的なファイルを扱う。
●
inweb/2005/01/06/iw-S0_20050106.20
●
inweb/2005/01/06/iw-S0_20050106.21
●
in/2005/01/07/in-S0_20050107.01
●
in/2005/01/07/in-S1_20050107.01
上記のファイルは特に意味があって選んだわけではない。スキャンと非スキャントラフィックの例
を提示するためだけのものだ。以下では、データの分割方法とファイル名の意味を説明する。
5.3
出力フィールドの選択およびフォーマット操作：
rwcut
SiLKレコードは、コンパクトなバイナリフォーマットで格納される。直接読むことはできないた
め、
rwcut
ツール（例 5-3を参
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.