Settings of such equipment is typically stored in nonvolatile memory. The devices can be found in the /proc/mtd
root@router:~# cat /proc/mtd dev: size erasesize name #loader mtd0: 00040000 00010000 "cfe" #kernel mtd1: 003b0000 00010000 "linux" #root file system mtd2: 001db400 00010000 "rootfs" #settings mtd3: 00010000 00002000 "nvram" #free partition (I keep it extra initialization scripts) mtd4: 000f0000 00010000 "ddwrt"
Now, where do a full dump of interest to us section, and save somewhere on your computer.
#dump root@router:~# dd if=/dev/mtdblock/3 of=/tmp/config.dd 128+0 records in 128+0 records out
#store on your computer yurial@note:~$ scp firstname.lastname@example.org:/tmp/config.dd config.dd
To restore the settings to produce the inverse operation, and reboot.
#copy the settings from your PC to your device yurial@note:~$ scp config.dd email@example.com:/tmp/config.dd
#copy the settings from the dump root@router:~# dd if=/tmp/config.dd of=/dev/mtdblock/3 #reboot #ps before rebooting, disconnect usb-connected devices root@router:~# reboot -f
In general, this way you can make a backup, not only for firmware dd-wrt, and not only on dir-320. Such a method suitable, for example, to backup iphone, or geeksphone.
PS: on my dir-320, under my own firmware before restarting I would do a sync, to make sure that all data were recorded. However, under dd-wrt I, this led to the crash.