Krusader

I am using OTP (one time passwords, more specifically OPIE) for my
authentication to some SSH servers and this means I have to enter a
different password each time I use SFTP. It is intended to work like this
that the server replies in a welcome message (after user name has been
entered and before password) a line of text like "otp-md5 240 g95281 ext"
that contains information needed for me to generate the correct password
(actually it is the command I must execute on my end to generate the
password). In this the number 240 is decreasing after each successful
login.

Unfortunately Krusader doesn't show this text and I therefore need to
remember the last number the mechanism used to be able to generate a valid
password for login.

Therefore I would like to suggest that in case you don't specify a password
for SFTP it shows you the welcome message and asks for the password again.