On Nov 14, 2008, at 8:00 PM, Steven Susbauer wrote:
Lisa Casey wrote:
Hi,
I run several FreeBSD servers. Today I noticed an entry in the
auth.log
on one of them that concerns me. The entry is this:
Nov 12 15:44:29 mail sshd[30160]: Accepted keyboard-interactive/pam
for
michael from 89.123.165.3 po
rt 55185 ssh2
There is a user michael on the system, but whoever was doing this was
not him.
I am assuming someone tried to break in using a valid username
(michael)
but with an incorrect password. So I just conducted an experiment
to see
if I could replicate that log entry using another valid username:
mandy.
I ssh'ed into the server, gave mandy as the username with an
incorrect
password. The auth.log entry for that attempt is this:
Nov 14 19:44:54 mail sshd[96194]: Failed password for mandy from
72.155.127.223 port 51919 ssh2
and when I used something called keyboard interactive as the primary
authentication method in my ssh client, I get this:
sshd[96348]: error: PAM: authentication error for mandy from
72.155.127.223
Nothing about Accepted keyboard-interactive/pam. What does Accepted
keyboard-interactive/pam mean?
Also, in my ssh client, for authentication methods I have a choice of
password, publickey or keyboard interactive. I've always used
password,
and never even noticed that keyboard interactive before. What is
that?
Thanks,
Lisa Casey
Keyboard-interactive includes when the server sends requests such as
"Password:" to which the connector responds by typing their password.
This is different from entering the password in your client before
connecting. Example:
$ ssh [EMAIL PROTECTED]
[EMAIL PROTECTED]'s password:
Try doing similar with the correct password and I bet you will see the
"Accepted/keyboard-interactive", it may be possible that michael's
password is no longer secure.
Or michael is vacationing in Romania.
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