1. Saving : Unfortunately, there is no inbuilt function available for storing the results of the Fierce scan on the target at your disk. Although no saving function is available, so there is no feature to save the output in various formats. But you can redirect the output of the scan into any text file with some Linux skills and terminal commands.
2. Range Scan : One of the amazing functions or features of the Fierce tool is the Range scan. You can scan the range of IP address with a single click. The range is the option that is mandatory while performing a range scan. You need to specify the IP address; like ( 192.168.28.4/24 ).
3. Dictionary file : A brute-forcing attack or method approach is used for enumeration or detection of subdomains associated with the target domain. The inbuilt wordlist file is activated when the installation of the Fierce tool is done on the system. But Fierce tool allows users to use custom subdomains wordlists with a massive number of possible subdomains words. –subdomain-file is the option for using the custom wordlists for brute-forcing.

• Purpose : Used for DNS reconnaissance to locate hidden subdomains and non-contiguous IP spaces.
• Efficiency : Relies on DNS queries instead of brute-force scanning, making it fast and stealthy.
• Usage in Penetration Testing : Helps security professionals discover misconfigured networks before running deeper scans.
• Common Features : Performs domain lookups, wildcard queries, reverse lookups, and brute-force attacks on DNS servers.
• Integration : Often used before scanning tools like Nmap, Nessus, or Nikto for target enumeration.
• Open Source : Available as a free tool that can be used on Linux-based penetration testing systems.

• Locating non-contiguous IP space : Fierce can help identify IP addresses that are not sequential within a target network. This information can be useful for vulnerability assessments and penetration testing.
• Finding hostnames : Fierce can discover hostnames associated with the target domain, which can be useful for mapping out a network or identifying potential vulnerabilities.
• Zone transfers : Fierce supports zone transfers, which can provide extensive information about the target domain and subdomains. However, zone transfers are rare these days due to security concerns.
• Scanning contiguous IP space : Fierce can also scan continuous IP space if it is assigned within the target network.

1. Run a default scan against a domain : fierce --domain example.com
2. Attempt HTTP connection on discovered domains : fierce --domain example.com --connect
3. Scan an internal IP range using CIDR notation : fierce --range 192.168.1.0/24
4. Perform brute-force subdomain scanning : fierce --domain example.com --subdomains admin,mail,www
5. Check for wildcard DNS : fierce --domain example.com --wide
6. Perform zone transfer attack : fierce --domain example.com --dns-servers ns1.example.com,ns2.example.com

• python3
• python3-dnspython

Terminal Installation Commands ...
GUI Installation Steps ...

Linux

1. Update the package database : sudo apt-get update
2. Install Fierce using apt-get : sudo apt-get -y install fierce
3. Alternatively, you can use apt or aptitude for installation.

Windows

1. Install Python if not already installed.
2. Use pip to install Fierce : python -m pip install fierce
3. Alternatively, clone the repository :

$ git clone https://github.com/mschwager/fierce.git

$ cd fierce

$ python -m pip install dnspython==1.16.0

$ python fierce/fierce.py -h

MacOS

1. Install Homebrew if not already installed : /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
2. Use Homebrew to install Fierce : brew install fierce

Terminal Uninstallation Commands ...
GUI Uninstallation Steps ...

Linux

1. Remove the Fierce package : sudo apt-get remove fierce
2. To remove Fierce along with its dependencies : sudo apt-get -y autoremove fierce
3. For a complete removal, including configurations and data : sudo apt-get -y purge fierce
4. To remove configurations, data, and dependencies : sudo apt-get -y autoremove --purge fierce

Windows

1. Open the Control Panel or Settings.
2. Locate Fierce in the list of installed programs.
3. Click "Uninstall" and follow the prompts.

MacOS

1. Drag the Fierce application to the Trash.
2. Empty the Trash to remove the app.
3. For a thorough cleanup, manually delete associated files from the Library folder : ~/Library
4. Alternatively, use third-party tools like AppCleaner for complete removal.