February 2024
Beginner to intermediate
304 pages
9h 13m
Japanese
Content preview from 実務で使える メール技術の教科書 基本のしくみからプロトコル・サーバー構築・送信ドメイン認証・添付ファイル・暗号化・セキュリティ対策まで
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Let's learn about email technology!
あり、そのドメインの権威 DNS サーバーに対して設定が正しいかを確認し、
結果を表示します。正しく設定して、運用できていると思っていても、このよ
うなサイトを使えば、思わぬ設定ミスが見つかることもあります。
構築した DNS サーバーの設定を確認するだけでなく、DNS に関する情報
を変更したときには、必ず確認するとよいでしょう。
■ DNS サーバーの構築
VPS やレンタルサーバーを使用すれば簡単ですが、VPS 以外を使用する場
合や、自宅で試しに DNS サーバーを運用したい場合は、DNS サーバーを自
分で構築しなければなりません。
DNS サ ー バ ー と し て、BIND（Berkeley Internet Name Daemon）や
PowerDNS、NSD、Knot DNS 、Unbound、Dnsmasq などの ソ フト ウ ェ
アがよく使われます。BIND は高機能で、フルサービスリゾルバーにも権威
DNS サーバーにも使えるため、デファクトスタンダードのような存在になっ
ています。ただし、設定の記述が複雑なため、社内など小規模なネットワーク
では他の製品が使われることもあります。
ここでは BIND をインストールすることにします。インストールはこれまで
の Postfix や Dovecot と同様に、次のコマンドを実行します。
続いて、BIND を設定します。BIND の設定ファイルは「named.conf」と ...
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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.