Affects Version/s: 2.0
Fix Version/s: 2.2
In the class NNTPReply, I found the following status code:
public static final int AUTHENTICATION_REQUIRED = CODE_408;
My server returns 480, which I believe is the correct code.
480: The client must authenticate itself to the server (that is, it
must provide information as to the identity of the client) before
the facility can be used on this connection. This will involve
the use of an authentication extension such as [NNTP-AUTH].