Tool Documentation:


masscan Usage Example

Scan for a selection of ports (-p22,80,445) across a given subnet (

root@kali:~# masscan -p22,80,445

Starting masscan 1.0.3 ( at 2014-05-13 21:35:12 GMT
 -- forced options: -sS -Pn -n --randomize-hosts -v --send-eth
Initiating SYN Stealth Scan
Scanning 256 hosts [3 ports/host]
Discovered open port 22/tcp on
Discovered open port 445/tcp on
Discovered open port 80/tcp on

Packages and Binaries:


MASSCAN is TCP port scanner which transmits SYN packets asynchronously and produces results similar to nmap, the most famous port scanner. Internally, it operates more like scanrand, unicornscan, and ZMap, using asynchronous transmission. It’s a flexible utility that allows arbitrary address and port ranges.

Installed size: 553 KB
How to install: sudo apt install masscan

  • libc6

Fast scan of the Internet

root@kali:~# masscan --help
MASSCAN is a fast port scanner. The primary input parameters are the
IP addresses/ranges you want to scan, and the port numbers. An example
is the following, which scans the 10.x.x.x network for web servers:
 masscan -p80
The program auto-detects network interface/adapter settings. If this
fails, you'll have to set these manually. The following is an
example of all the parameters that are needed:
 --adapter-mac 00-11-22-33-44-55
 --router-mac 66-55-44-33-22-11
Parameters can be set either via the command-line or config-file. The
names are the same for both. Thus, the above adapter settings would
appear as follows in a configuration file:
 adapter-ip =
 adapter-mac = 00-11-22-33-44-55
 router-mac = 66-55-44-33-22-11
All single-dash parameters have a spelled out double-dash equivalent,
so '-p80' is the same as '--ports 80' (or 'ports = 80' in config file).
To use the config file, type:
 masscan -c <filename>
To generate a config-file from the current settings, use the --echo
option. This stops the program from actually running, and just echoes
the current configuration instead. This is a useful way to generate
your first config file, or see a list of parameters you didn't know
about. I suggest you try it now:
 masscan -p1234 --echo

Updated on: 2024-Mar-11