ファイアウォール
ファイアウォールとは、組織内部のローカルなネットワーク（イントラネット）と、その外部に広がるインターネットとの間に、外部からの不正なアクセスを防ぐ目的で設置されるルータやホスト、またはその機能的役割のことです。名前の由来は、火の手を防いで延焼を食い止める「防火壁（firewall）」に因んでいます。
BorderWare
- NTTヴィジュアル通信開発のファイアーウォール・アプリケーションサーバーを一体化させたネットワークセキュリティ構築ソフトウェア。http://www3.nttvics.co.jp/
Firewallと森で遊ぼう
- 基礎的な知識と概要、製品・各種ツール紹介、掲示板。http://eazyfox.homelinux.org/
ShapeIP
- ファイアウォールを構築するソフトウェア。i386アーキテクチャのPC用ライセンスウェア。http://www.3bit.co.jp/shapeip/
セキュリティについて説明するページ
- 個人向けファイアウォールソフトウェアのレビュー及び使用方法の解説。http://www.geocities.jp/bruce_teller/security/
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