Shoutbox

Remember that the plugin tries to use the port numbers sequentially, so it will try first at 8030, and it will only try the next port if the previous one was busy. You have to be sure that the port 8030 is open for incoming TCP connections, originating from any IP address. Some ISPs do not allow any incoming connections, so you might have to check that too.

BTW, for people who can't have incoming connections, I'll add a feature soon that solves the problem by switching the client/server role for sender/receiver.