Please be sure to enable the following ports for the ROSE NA client: 80, 29000, 29100, 29200.
Please be aware that any version of Windows starting with Windows XP Service Pack 2 or higher has a built-in firewall that can be configured and controlled via the Control Panel.
Furthermore, if your computer is already behind a centralized firewall or NAT router, you should not enable your Windows Firewall as that may be too restrictive as to block access. Please use the one on your network or the one on your computer but not both to avoid connection issues. Please contact your network administrator for further assistance.