You can upgrade the firmware on your router (I know it works on a 2700 and 2800) using FTP. This is useful when the router is remote on the internet, or you are connected locally using a wifi device
Here is a transcript from a session so you can see what happens.
Use at you own risk, but if you have no wired devices or you are miles away (as I often am) sometimes it's the only way:
First of all tick "enable remote firmware upgrade (FTP)" in the GUI Management screen.
Then download the firmware, unpack it and note the name of the
.all file. you MUST NOT use the .rst file for this method.
upgrade session wrote:
C:\firmware\Vigor_2700\2621_UK> Dir
Directory of C:\Firmware\Vigor_2700\2621_UK
31/07/2006 16:43 2,501,496 v2k7v_a2_2621.all
C:\Firmware\Vigor_2700\2621_UK>ftp 192.168.1.1 <---if you are remote use the router WAN address
Connected to 192.168.1.1.
220 DrayTek FTP version 1.0
User (192.168.1.1:(none)): newline
331 Enter PASS command
Password: your router password
230 Logged in
ftp> type binary <--- important
200 Type I OK
ftp> send v2k7v_a2_2621.all
200 Port command okay
150 Opening data connection for STOR v2k7v_a2_2621.all
~ takes a minute or so ~
226 Firmware file has been uploaded successfully.
ftp: 2501496 bytes sent in 45.39Seconds 55.11Kbytes/sec.
ftp> quit
221 Goodbye! Router will be reboot now.
~router reboots~
More information can be found here:
http://www.draytek.co.uk/support/kb_vigor_reflash.html#reflash
Under the section:
How do I remotely upgrade firmware ? 
