fierce
DNS reconnaissance to locate non-contiguous IP space.
KaliParrotlow
pkg: fierce
fierce performs DNS recon — zone transfers, subdomain brute force and nearby-host discovery — to map an org’s footprint.
Syntax
fierce --domain {domain}
Example
fierce --domain example.com
Attempts a zone transfer, then brute-forces subdomains and probes surrounding IPs.
Advantages
- Finds adjacent/forgotten hosts
- Simple one-line usage
- Good footprint mapper
Disadvantages
- Brute forcing is active
- Wordlist-dependent
- Slower than passive tools
Tags
#dns#subdomains
Official docs: fierce ↗
Related commands
Frequently asked questions
What is fierce used for?
fierce performs DNS recon — zone transfers, subdomain brute force and nearby-host discovery — to map an org’s footprint.
What is an example fierce command?
A common example is: fierce --domain example.com — Attempts a zone transfer, then brute-forces subdomains and probes surrounding IPs.
Is fierce part of Kali Linux?
Yes. fierce ships with Kali Linux (and Parrot OS). If missing, install it with: sudo apt install fierce.
What category of security tool is fierce?
fierce is a Information Gathering tool with a low-risk profile when run against a live target.
Try recon tools live
Run real scans against a domain you control, stage by stage.