凡包含factory字样的，是在原机界面上直接刷机用的。bin、img根据原厂的不同有所区别，如bin用在TP-Link系列上，img用在网件Netgare上。包含sysupgrade字样的，是在OpenWRT系统里的界面，更新固件用的。tftp固件是用tftp方式 刷机用的。网件和巴法络都支持tftp方式刷机。
tar格式是直接在界面上传刷机，不需要解压，在刷机的时候它自动在路由里进行解压。openwrt-*-factory.bin      标准镜像，用于工厂刷机模式，一般使用squashfs的文件
openwrt-*-factory.img      标准镜像，用于工厂刷机模式
openwrt-*-sysupgrade.bin   标准镜像，用于系统升级模式，一般使用squashfs的文件
openwrt-*-sysupgrade.tar
openwrt-*-tftp.bin         标准镜像，用于tftp刷机模式，一般使用squashfs的文件

Phase 1: OS specific quirksNote: The firmware recovery mode has following quirks:If you have a Windows machine available you can use Microsoft Internet Explorer 7 (a Windows running on a VM, like VMware, does not work)
* Windows 8: Firefox cannot be used to update firmware (presumably applies to other versions of Windows).
* Windows 8: Use Internet Explorer 10. Press F12. Select Browser Mode: IE8. Leave the compatibility setting at IE5 Quirks.
* Windows 7: try to turn off ipv6
If you are running Linux you can:
* Ideally use C program below, otherwise:
* Set your interface to 100Mbps using sudo ethtool -s eth0 speed 100 autoneg off, install IE7 in Wine and use it to flash.
* Later models (or some hardware combinations) may need sudo ethtool -s eth0 speed 100 duplex half autoneg off (e.g. B2, FW ver 2.05EU).
* Use the following script.
* firmware 2.02EU should still be available on ftp.dlink.de and it doesn't require IE, nor Mac.
* 2.05EUB09_7 can't be downgraded to 2.04 but fortunately can be downgraded to 2.02EU
* I had to disable both avahi, cups and IPv6 to get it working. (B2 FW ver 2.01EU)
If you are running MacOS you can use Google Chrome Opera
FW version 2.05EU seems very difficult to flash, there may be timing issues (that's just a guess). After downgrading to 2.04EU (get it from ftp.dlink.de) it worked the first time, using IE7 on a virtualbox Win XP "guest". YMMV.
Phase 2: General steps1. Get into the D-Link recovery console with the steps below:a. While powering up the router, press and hold the reset button until the power LED starts blinking orange (usually takes around 45 (forty-five) seconds )b. Set a static IP on your PC to 192.168.0.100/24c. connect to http://192.168.0.1, mind the quirks!
2. Click "Browse" and select your OpenWrt image file (openwrt-ar71xx-dir-825-b1-squashfs-factory.bin, this binary image is available in the Backfire 10.03.1rc1 download directory and above)
3. Click "Update" and let router flash the image (don't worry if it reboots before it reaches 100%). The page should display "Device is Upgrading the Firmware" in blue letters with the current percentage in red (with an incompatible Browser it doesn't). Look at the screenshot at the end of this section.
4. The router's power LED should blink orange during bootup, as soon as it stops flashing, you can connect to it
Tip! Note that default DHCP will allocate on 192.168.1.x, which is different subnet to the address you allocated above. This is why you can't connect until you change your IP address.

sysupgrade -v openwrt-xxx-sysupgrade.bin