# 使用 Homebrew, apk, dnf, MacPorts, Nix, zypper, apt, pacman 安装 knock 查看 knock 的安装路径、可执行文件、元数据以及面向 AI 代理工作流的安全说明。 ## 安装 ```sh sudo av install brew:knock ``` 其他安装命令: ### macOS - Homebrew (100%): ```sh brew install knock ``` 证据: local Homebrew formula metadata - MacPorts (94%): ```sh sudo port install knock ``` 证据: MacPorts ports tree: net/knock/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1 ### Linux - apk (92%): ```sh sudo apk add knock ``` 证据: Alpine Linux edge package indexes: knock from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz - dnf (92%): ```sh sudo dnf install knock ``` 证据: Fedora Rawhide package metadata: knock 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#knock ``` 证据: nixpkgs package indexes: pkgs/by-name/kn/knock/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 - zypper (92%): ```sh sudo zypper install knock ``` 证据: openSUSE Tumbleweed package metadata: knock from https://download.opensuse.org/tumbleweed/repo/oss/repodata/50b07339cb64c8ed4091bdbabddadc1ff5737b090e478818a195b40d8a3292861a879139b4a3987c31109699fde9fbf4a716367ddf4eef77da75f96e3193d6ed-primary.xml.zst - Debian apt (92%): ```sh sudo apt install knockd ``` 证据: Debian stable package indexes: knockd from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz - pacman (92%): ```sh sudo pacman -S knockd ``` 证据: Arch Linux sync databases: knockd from https://geo.mirror.pkgbuild.com/extra/os/x86_64/extra.db.tar.gz ## 软件包事实 - **软件包键:** brew:knock - **软件包管理器:** Homebrew - **软件包管理器页面:** - **版本:** 0.8 - **来源摘要:** Port-knock server - **主页:** - **仓库:** - **许可证:** GPL-2.0-or-later - **源码归档:** - **已生成:** 2026-08-04T22:13:35+00:00 ## 可执行文件 - knock (cli) - knock_helper_ipt.sh (cli) - knockd (cli) - knock (别名) - knock_helper_ipt.sh (别名) - knockd (别名) ## macOS 提供的库 - libpcap ## 安装行为 - post-install 钩子: 未定义 - Bottle: 可用 于 arm64_big_sur, arm64_linux, arm64_monterey, arm64_sequoia, arm64_sonoma, arm64_tahoe, arm64_ventura, big_sur, catalina, monterey, sonoma, ventura ## 版本和新鲜度 - 页面生成时间: 2026-08-04 - 管理器版本: 0.8 - 本地数据: OK - 上游仓库: https://github.com/jvinet/knock - 信息: No package-manager update timestamp was available. - 信息: No cached GitHub release or tag data was available. ## 项目历史与用法 knock is Judd Vinet's port-knocking server and client. It watches network traffic with libpcap for a configured sequence of port hits and runs commands, commonly firewall changes, when the sequence matches. ### 项目历史 The README carries a 2004 copyright notice and describes the core design that still defines the package: closed ports can receive a secret sequence because knockd sniffs link-layer traffic rather than listening on those ports. The bundled ChangeLog lists 0.1 as the initial release and shows later work adding TCP flag handling, reload behavior, timeouts, kernel-space BPF filtering, one-time sequences, interface selection, and IPv6 support. Version 0.8 was published on 2021-04-24 with multiple fixes and IPv6 support. The GitHub repository retained a small C codebase, an example `knockd.conf`, and manpage documentation rather than growing into a larger access-control framework. ### 采用历史 knock spread through Unix-like distributions because it solved a specific sysadmin problem with a small daemon and client. Package names vary between `knock`, `knockd`, and distribution-specific formula names, but the underlying model stayed close to the original README example: a knock sequence opens SSH, and another sequence closes it. ### 使用方式 A server runs `knockd` with a configuration file such as `/etc/knockd.conf`; a client runs `knock` to send TCP or UDP packets to the configured sequence. Commands usually add or remove firewall rules, so the tool is operationally simple but security-sensitive: the sequence should be treated like a shared secret and firewall commands must be written carefully. ### 为什么软件包爱好者会关心 knock is a memorable package because it embodies a whole security pattern in a tiny Unix daemon. It is also a reminder of the early-2000s sysadmin style: libpcap, iptables commands, config files, and a tiny client were enough to make a practical layer around SSH exposure. ### 时间线 - 2004: README copyright identifies Judd Vinet's original project era. - 0.1: ChangeLog records the initial release. - 0.3: ChangeLog added PPP support, command timeout directives, SIGHUP config reloads, and per-port protocols. - 0.5: ChangeLog added one-time sequences, interface selection, BPF filtering, and security fixes. - 0.7: ChangeLog documented the target directive and consolidated OS-specific networking code. - 2021-04-24: v0.8 release published with fixes and IPv6 support. ### Related projects - knock is related to other port-knocking and single-packet-authorization tools, firewall managers such as iptables, packet crafting tools such as sendip, and SSH hardening workflows. ### 来源 - - - - ## 安全说明 broad file, network, media, or database tool signal. - **Geiger 风险:** blue / 中 - broad file, network, media, or database tool signal ## 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/knockd.conf ## 源数据库详情 - **Source Database:** Homebrew formula API - **Tap:** homebrew/core - **Full Name:** knock - **Version Scheme:** 0 - **Revision:** 0 - **Head Version:** HEAD - **Bottle Stable Root URL:** - **Deprecated:** no - **Disabled:** no - **Keg Only:** no - **URL Keys:** head, stable ## 其他软件包管理器记录 - Nix - knock: normalized package name match | nixpkgs package indexes: pkgs/by-name/kn/knock/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 - apk - knock - 0.8.2-r2: normalized package name match | Alpine Linux edge package indexes: knock from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | A simple port-knocking daemon | https://github.com/TDFKAOlli/knock - apk - knock-doc - 0.8.2-r2: normalized package name match | Alpine Linux edge package indexes: knock-doc from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | A simple port-knocking daemon (documentation) | https://github.com/TDFKAOlli/knock - apk - knock-openrc - 0.8.2-r2: normalized package name match | Alpine Linux edge package indexes: knock-openrc from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | A simple port-knocking daemon (OpenRC init scripts) | https://github.com/TDFKAOlli/knock - dnf - knock - 0.8-14.fc45: normalized package name match | Fedora Rawhide package metadata: knock from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/210a2053c8e007daf9ae39c2a21daaed9b2ddd07d63ecffa597050361e73650c-primary.xml.zst | A port-knocking server/client | http://www.zeroflux.org/projects/knock - dnf - knock-server - 0.8-14.fc45: normalized package name match | Fedora Rawhide package metadata: knock-server from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/210a2053c8e007daf9ae39c2a21daaed9b2ddd07d63ecffa597050361e73650c-primary.xml.zst | A port-knocking server/client | http://www.zeroflux.org/projects/knock - zypper - knock - 0.8-4.6: normalized package name match | openSUSE Tumbleweed package metadata: knock from https://download.opensuse.org/tumbleweed/repo/oss/repodata/50b07339cb64c8ed4091bdbabddadc1ff5737b090e478818a195b40d8a3292861a879139b4a3987c31109699fde9fbf4a716367ddf4eef77da75f96e3193d6ed-primary.xml.zst | A Port-Knocking Client | http://www.zeroflux.org/knock/ - zypper - knockd - 0.8-4.6: normalized package name match | openSUSE Tumbleweed package metadata: knockd from https://download.opensuse.org/tumbleweed/repo/oss/repodata/50b07339cb64c8ed4091bdbabddadc1ff5737b090e478818a195b40d8a3292861a879139b4a3987c31109699fde9fbf4a716367ddf4eef77da75f96e3193d6ed-primary.xml.zst | A port-knocking server | http://www.zeroflux.org/knock/ - MacPorts - knock: normalized package name match | MacPorts ports tree: net/knock/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1 - Debian apt - knockd - 0.8-2+b6: installed executable or alias match | Debian stable package indexes: knockd from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | small port-knock daemon | http://www.zeroflux.org/projects/knock - Ubuntu apt - knockd - 0.8-2build2: installed executable or alias match | Ubuntu 24.04 LTS package indexes: knockd from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | small port-knock daemon | http://www.zeroflux.org/projects/knock - pacman - knockd - 0.8-2: installed executable or alias match | Arch Linux sync databases: knockd from https://geo.mirror.pkgbuild.com/extra/os/x86_64/extra.db.tar.gz | A simple port-knocking daemon | https://github.com/jvinet/knock ## 相关链接 - [Source-control packages](https://pkg.so/zh-hans/source-control-tools/) - Belongs to a source-control command family. - [Secret-risk packages](https://pkg.so/zh-hans/secret-risk-packages/) - Has protected-tool coverage, approval-gate, or non-low Geiger security signals. - [Terminal utility packages](https://pkg.so/zh-hans/terminal-utilities/) - Matched terminal and command-line workflow metadata. - [Networking and protocol packages](https://pkg.so/zh-hans/networking-protocol-tools/) - Matched network, protocol, or remote-service metadata. - [rush](https://pkg.so/zh-hans/brew/rush/) - Shares pkgdb curated category or tags: access-control, cli, security. - [fwknop](https://pkg.so/zh-hans/brew/fwknop/) - Shares pkgdb curated category or tags: access-control, cli, firewall, port-knocking, security. - [libselinux](https://pkg.so/zh-hans/brew/libselinux/) - Shares pkgdb curated category or tags: access-control, cli, security. - [clamav](https://pkg.so/zh-hans/brew/clamav/) - Shares pkgdb curated category or tags: cli, daemon, security. - [fail2ban](https://pkg.so/zh-hans/brew/fail2ban/) - Shares pkgdb curated category or tags: cli, firewall, security. - [sshguard](https://pkg.so/zh-hans/brew/sshguard/) - Shares pkgdb curated category or tags: cli, firewall, security. - [pomerium](https://pkg.so/zh-hans/brew/pomerium/) - Shares pkgdb curated category or tags: access-control, cli, security. - [gnutls](https://pkg.so/zh-hans/brew/gnutls/) - Shares pkgdb curated category or tags: cli, security. - [crip](https://pkg.so/zh-hans/brew/crip/) - Security-sensitive metadata or terminology overlaps. Shared terms: cli, security, server. ## Combined YAML source View the package source record on GitHub. [combined/knock.yml](https://github.com/mxcl/pkgdb/blob/main/combined/knock.yml) ## 来源 - 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