This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
4) Your firewall is blocking outgoing traffic (check your firewall settings). Also, inadvertently blocking is way easier to do than you think. If you ever told your firewall to not allow a specific Java program to to out to the network, you have effectively block all Java programs because the firewall software cannot tell between them (they all run as java.exe).