April 2020
Intermediate to advanced
352 pages
4h 11m
Japanese
Content preview from 実践 bashによるサイバーセキュリティ対策 ―セキュリティ技術者のためのシェルスクリプト活用術
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.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.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.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.
8章リアルタイムのログ監視
問題の発生後にログを解析する技術は重要なスキルである。しかし、ログファイルから情報をリアルタイムに抜き出して、悪意を持った、あるいは疑わしい活動がないかを確認することも同様に重要である。本章では、生成されたばかりのログのエントリを読み取り、アナリストに出力を渡すために整形し、既知のIOC（Indicator Of Compromise）に基づきアラートを生成するための一連の方法について見ていこう。
![[Tip]](/api/v2/epubs/urn:orm:book:9784873119052/files/images/tip.png) |
|
監査ログの維持、監視、分析（Maintenance、Monitoring、Analysis）は、CIS（Center for Internet Security）によるトップ20のセキュリティ対策として定義されている。詳細については、CISコントロールのWebページ（https://www.cisecurity.org/controls/）を参照のこと。 |
8.1 テキストログの監視
ログをリアルタイムに監視する最も基本的な方法は、tailコマンドの-fオプションである。これにより、ファイルが定常的に読み取られ、追加された内容が新規の行として標準出力に出力される。前章と同じく、Apacheのアクセスログを例として用いるが、ここで説明する技術自体は、どんなテキストログに対しても適用できるものである。Apacheのアクセスログをtailコマンドで監視するには次のようにする。
tail -f /var/logs/apache2/access.log
より高度な機能を適用させるために、コマンドを組み合わることもできる。 ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.