Java application behaving differently when run from netbeans

Hi,
When i run my program from netbeans it receives packets from ip addresses which are not in my subnet
but when i run it from outside netbeans it doesn't receives packets from ip addresses which are not in my subnet.
Can anybody explains why my application is showing different behavior when run from netbeans and when run independently?
Thanks.

Bingo! My script started the rmiregistry and continued on to start the servers. Apparently, it was too quick. I put a 10 second delay after the rmiregistry startup and all is working as it should.
Thanks for your help. You get the Duke dollars if I can figure out how that works.

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