Knock is a python script designed to enumerate sub-domains on a target domain through a wordlist.
$ python knock.py [ url ] [ wordlist ]
You can view a demo of the tool enumerating Facebook sub-domains on Youtube here:
Knock works on Linux, Windows and MAC OSX with a python version 2.6.x (or minor).
- Python version 2.6.x or minor.
- A wordlist
You can download Knock v1.3b here:
Or read more here.