# fail2ban を Homebrew, apk, apt, dnf, MacPorts, Nix, pacman, zypper でインストール

fail2ban のインストール経路、実行ファイル、メタデータ、AI エージェント向けセキュリティノートを確認します。

## インストール

```sh
sudo av install brew:fail2ban
```

追加のインストールコマンド:

### macOS

- Homebrew (100%):

```sh
brew install fail2ban
```

  証拠: local Homebrew formula metadata

- MacPorts (94%):

```sh
sudo port install fail2ban
```

  証拠: MacPorts ports tree: security/fail2ban/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1

### Linux

- apk (92%):

```sh
sudo apk add fail2ban
```

  証拠: Alpine Linux edge package indexes: fail2ban from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz

- Debian apt (92%):

```sh
sudo apt install fail2ban
```

  証拠: Debian stable package indexes: fail2ban from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz

- dnf (92%):

```sh
sudo dnf install fail2ban
```

  証拠: Fedora Rawhide package metadata: fail2ban from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/210a2053c8e007daf9ae39c2a21daaed9b2ddd07d63ecffa597050361e73650c-primary.xml.zst

- Nix (92%):

```sh
nix profile install nixpkgs#fail2ban
```

  証拠: nixpkgs package indexes: pkgs/by-name/fa/fail2ban/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1

- pacman (92%):

```sh
sudo pacman -S fail2ban
```

  証拠: Arch Linux sync databases: fail2ban from https://geo.mirror.pkgbuild.com/extra/os/x86_64/extra.db.tar.gz

- zypper (92%):

```sh
sudo zypper install fail2ban
```

  証拠: openSUSE Tumbleweed package metadata: fail2ban from https://download.opensuse.org/tumbleweed/repo/oss/repodata/50b07339cb64c8ed4091bdbabddadc1ff5737b090e478818a195b40d8a3292861a879139b4a3987c31109699fde9fbf4a716367ddf4eef77da75f96e3193d6ed-primary.xml.zst

## パッケージ情報

- **パッケージキー:** brew:fail2ban
- **パッケージマネージャ:** Homebrew
- **パッケージマネージャページ:** <https://formulae.brew.sh/formula/fail2ban>
- **バージョン:** 1.1.0
- **ソース概要:** Scan log files and ban IPs showing malicious signs
- **ホームページ:** <https://www.fail2ban.org/>
- **リポジトリ:** <https://github.com/fail2ban/fail2ban>
- **上流ドキュメント:** <https://www.fail2ban.org/>
- **ライセンス:** GPL-2.0-or-later
- **ソースアーカイブ:** <https://github.com/fail2ban/fail2ban/archive/refs/tags/1.1.0.tar.gz>
- **最終更新:** 2026-08-02T16:35:31+09:00
- **生成日時:** 2026-08-04T22:13:35+00:00

## 実行可能ファイル

- fail2ban-client (cli)
- fail2ban-python (cli)
- fail2ban-regex (cli)
- fail2ban-server (cli)
- fail2ban-testcases (cli)
- fail2ban-client (エイリアス)
- fail2ban-python (エイリアス)
- fail2ban-regex (エイリアス)
- fail2ban-server (エイリアス)
- fail2ban-testcases (エイリアス)

## 依存関係

- python@3.14

## ビルド依存関係

- sphinx-doc

## インストール挙動

- post-install フック: 未定義
- サービス: declared
- 注意点: You must enable any jails by editing: $HOMEBREW_PREFIX/etc/fail2ban/jail.conf Other configuration files are in $HOMEBREW_PREFIX/etc/fail2ban. See more instructions at https://github.com/fail2ban/fail2ban/wiki/Proper-fail2ban-configuration.
- Bottle: 利用可能 対象 arm64_linux, arm64_sequoia, arm64_sonoma, arm64_tahoe, sonoma, x86_64_linux

## バージョンと鮮度

- ページ生成日: 2026-08-04
- マネージャ版: 1.1.0
- マネージャ更新日: 2026-08-02
- ローカルデータ: OK
- 上流リポジトリ: https://github.com/fail2ban/fail2ban
- 検出された最新: 1.1.0 (最新)
## プロジェクトの歴史と使われ方

Fail2Ban is a long-running Python daemon and command-line toolkit for reacting to hostile log patterns by banning hosts through firewall actions. Its core appeal has stayed stable since the early releases: watch authentication and service logs, count repeated failures, and temporarily block the offending address.

### プロジェクトの歴史

The official changelog records Fail2Ban releases back to 0.1.0 in October 2004. Early 0.x releases moved quickly through alpha, beta, and stable lines, with 0.6.0 stable in 2005, the 0.7 branch in 2006, and 0.8.0 stable in 2007. The README still credits Cyril Jaquier as original author and describes the project as community-driven for years.

The 0.9 series, beginning in 2014, marked the modern service-management era by adding a systemd journal backend. The 0.10 line followed with IPv6 work, including an alpha labeled for IPv6 support in 2016 and a 0.10.0 release in 2017. Later releases continued to refine journald, iptables, nftables, firewalld, pf, and service-specific filters.

The 1.x line arrived with 1.0.1 and 1.0.2 releases in 2022 and 1.1.0 in 2024. These releases focused less on changing the basic model and more on compatibility, security, and operational maintenance: Python version support, CVE fixes, systemd backend stability, IPv6 auto-detection, newer service log formats, and additional filters and actions.

### 採用の歴史

Fail2Ban became part of the standard Linux server-security toolbox because it matched the common shape of internet-facing Unix services: SSH, mail, web, and database daemons emitting failed-authentication logs. The project README says it is likely already packaged for a user's Linux distribution, and the supplied package-manager facts show broad availability across Alpine, Debian, Fedora/DNF, Homebrew, MacPorts, Nix, Arch, Ubuntu, and openSUSE.

Its adoption has been helped by configuration conventions that distributions can ship and administrators can override. Stock jails, filters, actions, and path files let package maintainers encode distribution-specific log locations while users keep local policy in `/etc/fail2ban`, especially `jail.local` and `jail.d` snippets.

### 使われ方

A typical Fail2Ban deployment installs the daemon, enables selected jails such as `sshd`, and lets `fail2ban-server` monitor logs while administrators use `fail2ban-client` for status, reloads, and manual control. The README explicitly warns users to interact through `fail2ban-client` rather than calling the server directly.

The package also matters to operators because `fail2ban-regex` gives a local way to test filters against log samples before enabling bans. That workflow, plus filter and action directories, made Fail2Ban not just a daemon but a small domain-specific toolkit for converting service logs into firewall state.

### パッケージ好きにとっての重要性

Fail2Ban is significant in package-manager culture because it is both ordinary and sharp-edged: a tiny install command can place a privileged daemon, distro-specific defaults, init/systemd integration, and firewall actions on a host. Packagers must get paths, service units, Python dependencies, and default actions right or administrators either get no protection or accidental lockouts.

It is also a classic example of a package whose value comes from accumulated operational knowledge. The code is important, but the long tail of maintained filters for OpenSSH, Apache, nginx, Postfix, Dovecot, Exim, and many other services is why administrators keep installing it.

### タイムライン

- 2004: Fail2Ban 0.1.0 alpha released.
- 2005: 0.6.0 stable release published.
- 2007: 0.8.0 stable release published.
- 2014: 0.9.0 beta added systemd journal backend.
- 2016: 0.10.0 alpha introduced IPv6-support work.
- 2017: 0.10.0 released.
- 2020: 0.11.2 released.
- 2022: 1.0.1 and 1.0.2 released with compatibility and security fixes.
- 2024: 1.1.0 released with newer Python support and further backend/filter updates.

### Related projects

- OpenSSH, iptables, nftables, firewalld, pf, systemd-journald, DenyHosts, sshguard

### ソース

- <https://github.com/fail2ban/fail2ban>
- <https://raw.githubusercontent.com/fail2ban/fail2ban/master/README.md>
- <https://raw.githubusercontent.com/fail2ban/fail2ban/master/ChangeLog>
- <https://fail2ban.readthedocs.io/>
- <https://github.com/fail2ban/fail2ban/wiki/How-to-install-fail2ban-packages>


## セキュリティノート

broad file, network, media, or database tool signal. formula declares a Homebrew service.

- **Geiger リスク:** orange / 中
- broad file, network, media, or database tool signal
- formula declares a Homebrew service


## Configuration and credential file locations

These source-backed paths show where this package keeps local settings or durable credentials. Automic Vault can use them as review targets for secret scanning, migration, and command approval.


## Configuration files

- Unix: /etc/fail2ban/jail.conf, /etc/fail2ban/jail.local, /etc/fail2ban/jail.d/*.conf, /etc/fail2ban/filter.d/*.conf, /etc/fail2ban/action.d/*.conf
## ソースデータベース詳細

- **Source Database:** Homebrew formula API
- **Tap:** homebrew/core
- **Full Name:** fail2ban
- **Version Scheme:** 0
- **Revision:** 2
- **Head Version:** HEAD
- **Bottle Stable Root URL:** <https://ghcr.io/v2/homebrew/core>
- **Deprecated:** no
- **Disabled:** no
- **Keg Only:** no
- **URL Keys:** head, stable

## 他のパッケージマネージャ記録

- Debian apt - fail2ban - 1.1.0-8: normalized package name match | Debian stable package indexes: fail2ban from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | ban hosts that cause multiple authentication errors | https://www.fail2ban.org
- Nix - fail2ban: normalized package name match | nixpkgs package indexes: pkgs/by-name/fa/fail2ban/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1
- Ubuntu apt - fail2ban - 1.0.2-3: normalized package name match | Ubuntu 24.04 LTS package indexes: fail2ban from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | ban hosts that cause multiple authentication errors | https://www.fail2ban.org
- apk - fail2ban - 1.1.0-r3: normalized package name match | Alpine Linux edge package indexes: fail2ban from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | Scans log files for login failures then updates iptables to reject originating ip address | https://www.fail2ban.org/
- apk - fail2ban-doc - 1.1.0-r3: normalized package name match | Alpine Linux edge package indexes: fail2ban-doc from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | Scans log files for login failures then updates iptables to reject originating ip address (documentation) | https://www.fail2ban.org/
- apk - fail2ban-openrc - 1.1.0-r3: normalized package name match | Alpine Linux edge package indexes: fail2ban-openrc from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | Scans log files for login failures then updates iptables to reject originating ip address (OpenRC init scripts) | https://www.fail2ban.org/
- apk - fail2ban-pyc - 1.1.0-r3: normalized package name match | Alpine Linux edge package indexes: fail2ban-pyc from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | Precompiled Python bytecode for fail2ban | https://www.fail2ban.org/
- apk - fail2ban-tests - 1.1.0-r3: normalized package name match | Alpine Linux edge package indexes: fail2ban-tests from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | Fail2ban test cases | https://www.fail2ban.org/
- dnf - fail2ban - 1.1.0-19.fc45: normalized package name match | Fedora Rawhide package metadata: fail2ban from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/210a2053c8e007daf9ae39c2a21daaed9b2ddd07d63ecffa597050361e73650c-primary.xml.zst | Daemon to ban hosts that cause multiple authentication errors | https://www.fail2ban.org
- dnf - fail2ban-all - 1.1.0-19.fc45: normalized package name match | Fedora Rawhide package metadata: fail2ban-all from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/210a2053c8e007daf9ae39c2a21daaed9b2ddd07d63ecffa597050361e73650c-primary.xml.zst | Install all Fail2Ban packages and dependencies | https://www.fail2ban.org
- dnf - fail2ban-firewalld - 1.1.0-19.fc45: normalized package name match | Fedora Rawhide package metadata: fail2ban-firewalld from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/210a2053c8e007daf9ae39c2a21daaed9b2ddd07d63ecffa597050361e73650c-primary.xml.zst | Firewalld support for Fail2Ban | https://www.fail2ban.org
- dnf - fail2ban-hostsdeny - 1.1.0-19.fc45: normalized package name match | Fedora Rawhide package metadata: fail2ban-hostsdeny from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/210a2053c8e007daf9ae39c2a21daaed9b2ddd07d63ecffa597050361e73650c-primary.xml.zst | Hostsdeny (tcp_wrappers) support for Fail2Ban | https://www.fail2ban.org
- dnf - fail2ban-mail - 1.1.0-19.fc45: normalized package name match | Fedora Rawhide package metadata: fail2ban-mail from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/210a2053c8e007daf9ae39c2a21daaed9b2ddd07d63ecffa597050361e73650c-primary.xml.zst | Mail actions for Fail2Ban | https://www.fail2ban.org
- dnf - fail2ban-selinux - 1.1.0-19.fc45: normalized package name match | Fedora Rawhide package metadata: fail2ban-selinux from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/210a2053c8e007daf9ae39c2a21daaed9b2ddd07d63ecffa597050361e73650c-primary.xml.zst | SELinux policies for Fail2Ban | https://www.fail2ban.org
- dnf - fail2ban-sendmail - 1.1.0-19.fc45: normalized package name match | Fedora Rawhide package metadata: fail2ban-sendmail from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/210a2053c8e007daf9ae39c2a21daaed9b2ddd07d63ecffa597050361e73650c-primary.xml.zst | Sendmail actions for Fail2Ban | https://www.fail2ban.org
- dnf - fail2ban-server - 1.1.0-19.fc45: normalized package name match | Fedora Rawhide package metadata: fail2ban-server from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/210a2053c8e007daf9ae39c2a21daaed9b2ddd07d63ecffa597050361e73650c-primary.xml.zst | Core server component for Fail2Ban | https://www.fail2ban.org


## 関連リンク

- [Secret-risk packages](https://pkg.so/ja/secret-risk-packages/) - Has protected-tool coverage, approval-gate, or non-low Geiger security signals.
- [Terminal utility packages](https://pkg.so/ja/terminal-utilities/) - Matched terminal and command-line workflow metadata.
- [Networking and protocol packages](https://pkg.so/ja/networking-protocol-tools/) - Matched network, protocol, or remote-service metadata.
- [Security and crypto packages](https://pkg.so/ja/security-crypto-tools/) - Matched security, identity, cryptography, password, signing, or certificate metadata.
- [python@3.14](https://pkg.so/ja/brew/python-3-14/) - Runtime dependency declared by Homebrew.
- [sphinx-doc](https://pkg.so/ja/brew/sphinx-doc/) - Build dependency declared by Homebrew.
- [sshguard](https://pkg.so/ja/brew/sshguard/) - Shares pkgdb curated category or tags: cli, firewall, intrusion-prevention, security.
- [knock](https://pkg.so/ja/brew/knock/) - Shares pkgdb curated category or tags: cli, firewall, security.
- [logcheck](https://pkg.so/ja/brew/logcheck/) - Shares pkgdb curated category or tags: cli, log-analysis, security.
- [gnutls](https://pkg.so/ja/brew/gnutls/) - Shares pkgdb curated category or tags: cli, security.
- [krb5](https://pkg.so/ja/brew/krb5/) - Shares pkgdb curated category or tags: cli, security.
- [nettle](https://pkg.so/ja/brew/nettle/) - Shares pkgdb curated category or tags: cli, security.
- [libcap](https://pkg.so/ja/brew/libcap/) - Shares pkgdb curated category or tags: cli, security.
- [nss](https://pkg.so/ja/brew/nss/) - Shares pkgdb curated category or tags: cli, security.
- [bandit](https://pkg.so/ja/brew/bandit/) - Both packages touch the same language runtime or ecosystem. Shared terms: analysis, cli, python, python-3-14, security.
- [flawfinder](https://pkg.so/ja/brew/flawfinder/) - Both packages touch the same language runtime or ecosystem. Shared terms: analysis, cli, python, python-3-14, security.
- [gimmecert](https://pkg.so/ja/brew/gimmecert/) - Both packages touch the same language runtime or ecosystem. Shared terms: cli, client, python, python-3-14, security.

## Combined YAML source

View the package source record on GitHub. [combined/fail2ban.yml](https://github.com/mxcl/pkgdb/blob/main/combined/fail2ban.yml)


## ソース

- pkg.so package database
- Geiger risk classifier
- package-page enrichment
- curated configuration and credential file locations
- curated package history
- package version freshness
- pkgdb category and tag curation
- package relationship graph
- external package-manager database matches
- cross-ecosystem install command graph