AirPort Extreme Firmware 5.5.1 for Windows descriptions AirPort Extreme Firmware 5. 5. 1 for Windows - Hard reset behavior is improved. With this firmware version pressing & holding the reset button for more than 5 seconds will cause the LED to flash rapidly. This visual feedback lets you know you’ ve held the button long enough to trigger a hard reset - Resolves a potential problem with PPPoE configurations when updating from 5. 4 or earlier - Improved reliability of WDS networks when using WPA security. If you had a WDS network secured by WPA & then removed any of the WDS nodes this could cause a memory leak resulting in the need to reboot your WDS network nodes - Resolved an issue with inbound passive FTP to a port-mapped computer on the network - Resolved an issue with certain printers which were no longer recognized by the base station after the 5. 5 firmware update was installed. With the 5. 5. 1 firmware these printers are again recognized by the base station. The following items were part of the previous 5. 5 release & are also included in this firmware: - AirPort firmware updates are now packaged in a new utility application which simplifies the process of installing firmware updates. This application is available for use on Mac OS X computers & on Microsoft Windows 2000 or XP - USB printer renaming - USB printers connected to the AirPort Extreme can now be renamed by using the AirPort Admin Utility - Multiple printer support for the “ Power over Ethernet” model of AirPort Extreme - The “ Power over Ethernet” model of AirPort Extreme now allows multiple USB printers to be connected through a USB hub to the AirPort Extreme. Other models of AirPort Extreme still support only one single USB-attached printer. To determine which model of AirPort Extreme you have check this article - WPA security for WDS networks - WDS networks made up of AirPort Extreme & AirPort Express base stations can now be secured with WPA-Personal security. All AirPort Extreme & AirPort Express units must be upgraded to the latest appropriate 5. 5 or 6. 1 firmware before the network can be secured with WPA - Improved reliability for WDS networks - WDS nodes will now check for the presence of other WDS nodes. This results in better WDS network connectivity. All AirPort Extreme & AirPort Express units must be upgraded to the latest appropriate 5. 5 or 6. 1 firmware - In certain situations wireless clients could send certain types of data which could cause the AirPort Extreme to stop transmitting data. This issue is improved in the 5. 5 firmware update - The 5. 5 Firmware Update improves performance & other concerns related to FTP RTSP IPSec TCP UDP & other IP protocols - Certain DNS traffic could affect AirPort Extreme performance. This issue is improved in the 5. 5 firmware - Certain PPP or PPPoE connections could encounter a situation where the AirPort Extreme could not communicate with the ISP requiring the base station and/or the ISP’ s modem to be rebooted. This is fixed in the 5. 5 firmware - Improved printing performance when printing to USB printers connected to the AirPort Extreme