Shoutbox

Certain messages may be beingblocked from your firewall (It may, for example, prevent people from pinging your IP address). Seeing as you logon to begin with, we can safely assume port 1863 to be working ok as otherwise you would not have been given the address to the login server. Now, the server does not send a PNG command, the client send it to the server. The server should respond with QNG.

I would check to see if you are able to SEND information past your firewall in this case. It may also be worth getting a packet sniffer that actually shows the data in an easy to understand way.