If you need to open a port for FOnline then try these steps
1.Click "Start," then "Control Panel." If you are using Vista, double-click "Windows Firewall." If you are using XP, double-click "Security Center," then click "Windows Firewall."
2.Click "Allow a Program Through Windows Firewall" if you are using Vista. Click the "Exceptions" tab, then "Add Port." If you are using Windows XP, click the "Advanced" tab, then click "Settings."
3.Type the name of the gaming application (FOnline) in the "Name" field, then type the port numbers in the appropriate box or boxes. Select the appropriate protocol (TCP or UDP). If you are using Windows XP, enter your IP address into the "Computer Name or IP Address" field.
Click "OK." Click "OK" again. Close Windows Firewall and give Cyber Jesus 50K.