Automic VaultAutomic Vault

brew

telnet を Homebrew, chocolatey, apt, dnf, zypper, scoop でインストール

telnet 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。

インストールコマンドセキュリティノート

インストール

追加のインストールコマンド

macOS

Homebrew確認済み · 100%
brew install telnet

local Homebrew formula metadata

概要

パッケージ概要

User interface to the TELNET protocol

コマンドとエイリアス

  • telnet

履歴

プロジェクトの歴史と使われ方

telnet is the classic command-line user interface to the TELNET protocol. The protocol was standardized for the ARPA Internet in RFC 854 in May 1983 as a general bidirectional byte-oriented terminal communications facility.

プロジェクトの歴史

The BSD-derived Apple manpage carries University of California copyright dates beginning in 1983 and describes `telnet` as a user interface to the TELNET protocol. This places the packaged client in the long Unix lineage of TCP/IP remote-login tools distributed with BSD systems and later carried by operating-system vendors.

RFC 854 defines the protocol around a Network Virtual Terminal and negotiated options, with the goal of connecting terminal devices and terminal-oriented processes across heterogeneous hosts. The companion RFC 855 documents how TELNET options were to be assigned and specified.

採用の歴史

TELNET was once a standard remote-login mechanism on Internet and Unix systems, but its cleartext nature caused SSH to replace it for administration. The client persisted in package repositories because it remained useful for protocol debugging, legacy devices, embedded systems, MUDs, BBS-style services, and quick TCP service inspection.

Homebrew's package exists because modern macOS no longer treats telnet as a default userland tool, while Debian, Ubuntu, Fedora/DNF, openSUSE/Zypper, Chocolatey, and Scoop coverage reflects ongoing cross-platform demand for the small diagnostic client.

使われ方

The manpage describes invoking `telnet` with a host and optional port, or without a host to enter an interactive `telnet>` command mode. Options cover IPv4/IPv6 selection, trace files, source address selection, escape characters, `.telnetrc` handling, rlogin-like behavior, Kerberos-related authentication controls, binary mode, and optional encryption support where compiled in.

In package-manager culture, `telnet host port` became shorthand for testing whether a TCP service accepts connections, even when the remote service is not a TELNET server. That usage survives because the client is tiny, scriptable enough for manual diagnostics, and familiar across Unix-like systems.

パッケージ好きにとっての重要性

telnet is historically significant because it is both a protocol tool and a fossil of early Internet userland. Package nerds care about it as a removed-default utility that keeps reappearing in bootstrap scripts, debugging recipes, and compatibility packages despite being inappropriate for secure login.

Its package metadata also illustrates how old network clients move from base operating systems into optional package-manager formulae as security expectations and default installs change.

タイムライン

  • 1983: RFC 854 standardized TELNET for the ARPA Internet.
  • 1983: RFC 855 standardized TELNET option specification procedures.
  • 1983-1994: BSD telnet manpage lineage records University of California copyrights and Berkeley manual revisions.
  • 2000: Apple-distributed telnet manpage date reflects later operating-system packaging of the BSD-derived client.

Related projects

  • telnetd is the companion server for the same protocol.
  • ssh replaced TELNET for secure remote login, while tools such as nc, socat, curl, and openssl s_client cover many modern diagnostic use cases.

セキュリティ状態

リスクレベル: グリーン

narrow executable package without higher-risk signals.

リスク分類器

リスク グリーン · 信頼度 低 · appliance

理由

  • narrow executable package without higher-risk signals

信号

  • metadata:no-higher-risk-signals

インストール挙動

  • formula メタデータに Homebrew post-install フックは記録されていません。
  • Homebrew bottle メタデータは 4 個のプラットフォームターゲットで利用できます。

推奨レビュー

エージェントに無人実行させる前に、このツールが平文の認証情報を読むか、リモート状態を書き込むか、成果物を公開するか、プラグインを起動するかを確認してください。

local files

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

Config paths the tool may read or write during local use.

Unix
~/.telnetrc

実行可能ファイル

インストールされる実行可能ファイル

コマンド種類公開範囲メモ
telnetcliグローバル実行可能ファイル

鮮度

バージョンと鮮度

これらの信号は、ページ生成時期、パッケージマネージャの活動、上流リリース比較を分けて示します。バージョン遅れは、証拠 URL と比較可能なバージョンがある場合だけ警告されます。

ページ生成日2026-07-25
マネージャ版308
マネージャ更新日
ローカルデータOK
上流not checked
検出された最新未検出

https://github.com/apple-oss-distributions/remote_cmds

インストールメタデータ

パッケージメタデータ

パッケージキーbrew:telnet
バージョン308
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/telnet
ホームページhttps://opensource.apple.com/
リポジトリhttps://github.com/apple-oss-distributions/remote_cmds
上流ドキュメントhttps://github.com/apple-oss-distributions/remote_cmds/blob/main/telnet/telnet.1
ライセンスBSD-4-Clause-UC AND APSL-1.0
ソースアーカイブhttps://github.com/apple-oss-distributions/remote_cmds/archive/refs/tags/remote_cmds-308.tar.gz
Bottle利用可能 (対象 arm64_sequoia, arm64_sonoma, arm64_tahoe, sonoma)
Homebrew post-install未定義
サービス宣言なし

レジストリ情報

ソースデータベース詳細

Source DatabaseHomebrew formula API
Taphomebrew/core
Full Nametelnet
Version Scheme0
Revision0
Conflicts With
  • inetutils
Requirements
  • macos
  • xcode
Bottle Stable Root URLhttps://ghcr.io/v2/homebrew/core
Deprecatedno
Disabledno
Keg Onlyno
URL Keys
  • stable

ソースデータベース一致

他のパッケージマネージャ記録

一致は外部パッケージマネージャインデックスから取得され、ローカルの Automic Vault パッケージリンクとは分けて表示されます。

Debian apt95%

telnet 0.17+2.6-3+deb13u3

transitional dummy package for inetutils-telnet default switch

https://www.gnu.org/software/inetutils/

sudo apt install telnet
  • Section: oldlibs
  • Architecture: all
  • Source Package: inetutils
  • 1 依存関係
  • normalized package name match
  • 一致条件: Telnet
Debian stable package indexes · deb.debian.org · Debian stable package indexes: telnet from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz
Ubuntu apt95%

telnet 0.17+2.5-3ubuntu4

transitional dummy package for inetutils-telnet default switch

https://www.gnu.org/software/inetutils/

sudo apt install telnet
  • Section: net
  • Architecture: all
  • Source Package: inetutils
  • 1 依存関係
  • normalized package name match
  • 一致条件: Telnet
Ubuntu 24.04 LTS package indexes · archive.ubuntu.com · Ubuntu 24.04 LTS package indexes: telnet from https://archive.ubuntu.com/ubuntu/dists/noble/main/binary-amd64/Packages.gz
dnf95%

telnet 0.17-96.fc44

The client program for the Telnet remote login protocol

http://web.archive.org/web/20070819111735/www.hcs.harvard.edu/~dholland/computers/old-netkit.html

sudo dnf install telnet
  • License: BSD-3-Clause AND BSD-4-Clause AND BSD-4-Clause-UC
  • Category: Unspecified
  • Architecture: x86_64
  • Source Package: telnet
  • 3 依存関係
  • 1 提供
  • normalized package name match
  • 一致条件: Telnet
Fedora Rawhide package metadata · dl.fedoraproject.org · Fedora Rawhide package metadata: telnet from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/e5ca8ce900cd68f5419e1c39ae517343100b306336cbaeb70a3c153121d95094-primary.xml.zst
dnf95%

telnet-server 0.17-96.fc44

The server program for the Telnet remote login protocol

http://web.archive.org/web/20070819111735/www.hcs.harvard.edu/~dholland/computers/old-netkit.html

sudo dnf install telnet-server
  • License: BSD-3-Clause AND BSD-4-Clause AND BSD-4-Clause-UC
  • Category: Unspecified
  • Architecture: x86_64
  • Source Package: telnet
  • 5 依存関係
  • 1 提供
  • normalized package name match
  • 一致条件: Telnet
Fedora Rawhide package metadata · dl.fedoraproject.org · Fedora Rawhide package metadata: telnet-server from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/e5ca8ce900cd68f5419e1c39ae517343100b306336cbaeb70a3c153121d95094-primary.xml.zst
zypper95%

telnet 1.2-177.7

A client program for the telnet remote login protocol

https://svnweb.freebsd.org/base/head/contrib/telnet/

sudo zypper install telnet
  • License: BSD-3-Clause
  • Category: Productivity/Networking/Other
  • Architecture: x86_64
  • Source Package: telnet
  • 2 依存関係
  • 2 提供
  • normalized package name match
  • 一致条件: Telnet
openSUSE Tumbleweed package metadata · download.opensuse.org · openSUSE Tumbleweed package metadata: telnet from https://download.opensuse.org/tumbleweed/repo/oss/repodata/be8d3611d25469107f32075a1697e69ec57a2b850b42348a658cc671ad5ec2b50760d02c3e59524d50da9a11d5be799bdaffba2e166e8ca8858512e3c0bd665d-primary.xml.zst
zypper95%

telnet-server 1.2-177.7

A Server Program for the Telnet Remote Login Protocol

https://svnweb.freebsd.org/base/head/contrib/telnet/

sudo zypper install telnet-server
  • License: BSD-3-Clause
  • Category: Productivity/Networking/Other
  • Architecture: x86_64
  • Source Package: telnet
  • 6 依存関係
  • 2 提供
  • normalized package name match
  • 一致条件: Telnet
openSUSE Tumbleweed package metadata · download.opensuse.org · openSUSE Tumbleweed package metadata: telnet-server from https://download.opensuse.org/tumbleweed/repo/oss/repodata/be8d3611d25469107f32075a1697e69ec57a2b850b42348a658cc671ad5ec2b50760d02c3e59524d50da9a11d5be799bdaffba2e166e8ca8858512e3c0bd665d-primary.xml.zst
Chocolatey95%

telnet

choco install telnet
  • normalized package name match
  • 一致条件: Telnet
Chocolatey community package catalog · community.chocolatey.org · Chocolatey community package catalog: telnet from http://community.chocolatey.org/api/v2/Packages?$filter=IsLatestVersion&$select=Id&$top=1000&$skiptoken='11','telegram.install'
Scoop95%

main/telnet

scoop install main/telnet
  • normalized package name match
  • 一致条件: Telnet
Scoop official bucket manifest trees · api.github.com · Scoop official bucket manifest trees: bucket/telnet.json from https://api.github.com/repos/ScoopInstaller/Main/git/trees/master?recursive=1

パッケージグラフ

リンクは、ローカルのパッケージ関係グラフ、補足データ、依存関係、エコシステム一致、パッケージハブ所属から来ています。

関連ツール

  • telnetdShares the same upstream source repository.
  • bsdmakeShares the same upstream homepage.
  • mtocShares the same upstream homepage.

同じワークフロー

  • c-kermitShares av.db curated category or tags: cli, networking, telnet, terminal.
  • puttyShares av.db curated category or tags: cli, networking, remote-access, telnet, terminal.
  • bandwhichShares av.db curated category or tags: cli, networking, terminal.
  • inetutilsShares av.db curated category or tags: cli, networking, telnet.
  • mabelShares av.db curated category or tags: cli, networking, terminal.
  • nghttp2Shares av.db curated category or tags: cli, networking, protocol.

エージェント安全ガイド

ソース経路

リポジトリデータから生成

このページは scripts/generate-pkg-sqlite.py が生成した非公開のパッケージ SQLite アーティファクトから av-web によって提供されます。

使用ソース

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