The error code [FFXI-3001] appears when a network port used by FINAL FANTASY XI is cut off for some reason. If this error occurs, please try the suggestions below:

・Restart network devices
Unplug and power down all network devices, including the one used to play, and wait about 30 minutes. It is likely that unnecessary information that remained on the devices will be reset, resulting in a smoother connection.

・Update network device firmware
Please update the programs used for the network devices.
Even if they are up to date, it is possible that by overwriting and reinstalling them will help fix the situation.

・Check router security settings (if applicable)
※Since details and steps will differ for each router manufacturer, please check with your router manufacturer for further details.

・Set the router to allow packets to pass through the following ports:

▼Port Numbers used for PlayOnline servers

　・TCP 25,80,110,443 and 50000～65535
　・UDP 50000～65535

▼Port Numbers used for Windows devices

　・TCP 1024～65535
　・UDP 50000～65535

We also suggest trying the following:

・Add "PlayOnline Viewer" to the list of Allowed Programs in the Windows Firewall.
This will allow the PlayOnline Viewer to communicate without interruption.

・Add "PlayOnline Viewer" as an exception to your security software.
※Since details and steps will differ from program to program, please check with the security software's developer for further details on how to do this.

・Close all startup applications.
Booting into Windows with only the minimum number of necessary programs may help the programs run without interference. To perform a clean boot on Windows 10, access the Task Manager, click
'More Details,' then the 'Startup' tab, and disable each program displayed there before restarting the device.