Fastest way to scan ports with Java

Question

I made a very simple port scanner, but it runs too slow, so I\'m looking for a way to make it scan faster. Here is my code:

public boolean portIsOpen(String          


        

Answer 1

I wrote my own asynchronous portscanner java service that can scan ports via TCP-SYN-Scan like Nmap does. It also support IMCP ping scans and can work with a very high throughput (depending on what the network can sustain):

https://github.com/subes/invesdwin-webproxy

Internally it uses a java binding pcap and exposes its services via JMS/AMQP. Though you can also use it directly in your application if you don't mind it having root permissions.