access challenge on empty password

[Alan DeKok]

izotov wrote:
> Hi,
> I use pam_radius with openssh on a FreeBSD box. When I authenticate, and for
> the first time I simply enter an empty password then the second time I am
> prompted for the password characters are echoed on the terminal.
> As I can see my freeradius server responses an access challenge to request
> with an existing user and empty password combo.
> Is this a normal behaviour? How can I configure the system not to do so?

  Why have you configured the server to respond with an Access-Challenge?

  Alan DeKok.