# fierce mit Homebrew, apt, Nix installieren

Prüfe Installationswege, Executables, Metadaten und Sicherheitshinweise für fierce in AI-Agent-Workflows.

## Installation

```sh
sudo av install brew:fierce
```

Weitere Installationsbefehle:

### macOS

- Homebrew (100%):

```sh
brew install fierce
```

  Evidenz: local Homebrew formula metadata

### Linux

- Debian apt (92%):

```sh
sudo apt install fierce
```

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

- Nix (92%):

```sh
nix profile install nixpkgs#fierce
```

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

## Paketfakten

- **Paketschlüssel:** brew:fierce
- **Paketmanager:** Homebrew
- **Version:** 1.6.0
- **Quellzusammenfassung:** DNS reconnaissance tool for locating non-contiguous IP space
- **Homepage:** <https://github.com/mschwager/fierce>
- **Repository:** <https://github.com/mschwager/fierce>
- **Generiert:** 2026-08-03T19:37:03+00:00

## Executables

- fierce (Alias)

## Installationsverhalten

- Bottle: nicht verfügbar

## Version und Aktualität

- Seite generiert: 2026-08-03
- Manager-Version: 1.6.0
## Projektgeschichte und Nutzung

fierce is a DNS reconnaissance command-line tool used to locate non-contiguous IP space and hostnames for a target domain before deeper scanning.

### Projektgeschichte

The modern fierce repository describes the project as a Python 3 conversion of the original fierce tool by RSnake and others at ha.ckers.org. The repository keeps the older Perl script under scripts/fierce.pl, where the banner identifies Fierce v0.9.9 beta dated March 24, 2007 and credits RSnake with threading and additions by IceShaman.

The Python rewrite kept the core reconnaissance idea but modernized the packaging and runtime around Python tooling. The README presents pip installation, direct source checkout, Poetry development setup, pytest testing, flake8 linting, and coverage commands.

### Adoptionsgeschichte

fierce belongs to the pre-exploitation reconnaissance layer of security tooling. Its README explicitly frames it as a precursor to tools such as nmap, unicornscan, Nessus, and Nikto, because those scanners are more useful once likely IP space and hostnames are known.

The supplied package metadata shows fierce packaged beyond Homebrew, including Debian, Ubuntu, and Nix. That distribution footprint fits a small CLI security utility that penetration testers and defenders can install quickly on Unix-like systems.

### Wie es verwendet wird

The README examples center on DNS lookups rather than exploitation. Typical use starts with a domain and a subdomain list, then optionally traverses nearby IPs, restricts nearby lookups to selected domains, attempts HTTP connections on discovered names, widens searches across a /24, checks zone-transfer exposure, redirects output to a file, or scans an internal address range against a chosen DNS server.

The original description, preserved in the README, is careful about scope: fierce is meant to identify likely targets inside and outside a corporate network through DNS, not to indiscriminately scan the internet or exploit hosts.

### Warum Paket-Nerds sich dafür interessieren

For package nerds, fierce is a recognizable example of a security tool whose cultural value is larger than its code size: it wraps a focused reconnaissance workflow into a single installable command and carries lineage from the older ha.ckers.org-era Perl security-tool ecosystem into Python 3 packaging.

### Zeitleiste

- 2007: The preserved Perl script identifies Fierce v0.9.9 beta dated March 24, 2007.
- Python 3 era: The maintained repository describes itself as a Python 3 conversion to simplify and modernize the codebase.
- Packaging note: The README documents pip installation and standard Python development commands.

### Related projects

- The project documentation positions fierce before tools such as nmap, unicornscan, Nessus, and Nikto in a reconnaissance workflow. Its operating domain also overlaps with DNS zone-transfer testing and subdomain discovery tools.

### Quellen

- <https://github.com/mschwager/fierce#readme>
- <https://github.com/mschwager/fierce/blob/master/scripts/fierce.pl>


## Sicherheitshinweise

narrow executable package without higher-risk signals.

- **Geiger-Risiko:** grün / niedrig
- narrow executable package without higher-risk signals

## Andere Paketmanager-Einträge

- Debian apt - fierce - 1.6.0-1: normalized package name match | Debian stable package indexes: fierce from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | Domain DNS scanner | https://github.com/mschwager/fierce
- Nix - fierce: normalized package name match | nixpkgs package indexes: pkgs/by-name/fi/fierce/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1
- Ubuntu apt - fierce - 1.5.0-1: normalized package name match | Ubuntu 24.04 LTS package indexes: fierce from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | Domain DNS scanner | https://github.com/mschwager/fierce


## Combined YAML source

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


## Quellen

- pkg.so package database
- Geiger risk classifier
- curated package history
- pkgdb category and tag curation
- external package-manager database matches
- cross-ecosystem install command graph