NMap wrapper for Java

Question

Is there an NMap wrapper implementation for Java ? I searched for it but could not find one. I want to scan network and detect applications running based on some port's state. I guess this must be a pretty common problem.

If its not nmap, then can somebody suggest alternate tools to detect the same.

Thanking in advance.

Answer 1

nmap is perfect. I used to run it as external process from java and parse its output. It is simple, so I recommend you to do the same. Surely you can implement your own "wrapper" that supports use-cases you need.

Answer 2

There is an open source library called nmap4j that will run Nmap for you and parse the XML into objects. It's on sourceforge.net.

Answer 3

nmap4j doesn't quite correctly utilize the Process output streams consumption. That directs to a nmap process hung after start (especially when nmap produces large output). + it doesn't work on Windows so far.

Answer 4

I wrote my own asynchronous portscanner java service that automates the port scanning for TCP-SYN-scan and ICMP scan like Nmap does. It does not incur the performance impact of creating Nmap processes because it uses pcap directly via a java binding: https://github.com/subes/invesdwin-webproxy

It works on a large scale and can exhaust your network if you configure too low request limits.