Local LAN: Can't receive a packet on my Linux that has been sent from my Windows.

[ramow]

I have a local wired network in my lab connecting two computers: 1 is Linux Fedora Core 6 and the other is windows XP. Linux IP is 192.168.1.12 and windows IP is 192.168.1.24

I wrote two very basic java classes: "send(IP, port)" and "receive(port)".
the first sends 1 UDP packet to the "IP,port" couple and
the second receives 1 UDP packet on port number "port"

When I send a packet from my Linux using "send(IP, port)", I receive successfully it on my Windows using the "receive(port)"

BUT,
when I send a packet from my Windows XP using "send(IP, port)", I can't receive it on the Linux end using the "receive(port)"

I tried using the 2 classes to send and receive UDP packets locally on each machine and they worked fine. I am also able to "ssh" to my Linux computer from my Windows computer. i am able to ping between them also in the two directions.

So why my Linux machine can't receive the packet. Is there any security options that i need to disable??


PLEASE help me I have been stuck for a long time now

[wsurritte]

Do you have Fedora's Firewall on?

[ramow]

Guys I think I have fixed it. all I did is:
service iptables stop