ncrack

ncrack [ <options> ] <target specifications>

-U
    Specify a file containing a list of usernames to try.

-P
    Specify a file containing a list of passwords to try.

-L
    Specify a file containing user:password combinations (one per line).

-u
    Specify a single username to attempt against the target.

-p
    Specify a single password to attempt against the target.

-T
    Set the timing template (e.g., Normal, Aggressive) to control scan speed.

--delay
    Set a minimum delay between probes to avoid overwhelming the target.

--connections
    Set the maximum total number of concurrent connections Ncrack will use.

--probe-timeout
    Set the timeout for a single authentication probe.

--max-retries
    Set the maximum number of retries for failed authentication probes.

-oN
    Output the scan results in normal readable format to the specified file.

-oX
    Output the scan results in XML format to the specified file.

-oA
    Output in all common formats (normal, XML, greppable) using the specified basename.

-v
    Increase the verbosity level, showing more details about the scan process.

-vv
    Increase the verbosity level even more for extensive details.

-d
    Set the debugging level (0-9) to output internal debug messages.

--reason
    Display the reason for each successful or failed authentication attempt.

--resume
    Resume a previously interrupted cracking session from a saved file.

--script