>Hi all, I have a need to scan a local lan and gather the IP addresses for any that have a certain port open, ( I'm looking for media servers ) I can do it in c# using GetIpNetTable and PhysicalAddress but can't find a similar way in Java

http://www.javacodex.com/Networking/Port-Scanner
http://www.java-samples.com/showtutorial.php?tutorialid=237

FYI - running a port scanner will often trigger anti-virus software and firewalls.