[tlug] pure-ftpd login?

[Nguyen Hung Vu <vuhung@example.com>]

Hello,

I found something in my /var/log/message

--------------------
Jul 11 21:21:48 ns pure-ftpd: (?@example.com) [INFO] New connection
from 
xxx.237.185.21
Jul 11 21:21:48 ns pure-ftpd: (?@example.com) [INFO] Logout - CPU time 
spent: 0.010 seconds.
Jul 11 21:26:50 ns pure-ftpd: (?@example.com) [INFO] New connection
from 
xxx.237.185.21
Jul 11 21:27:00 ns pure-ftpd: (?@example.com) [INFO] Logout - CPU time 
spent: 0.020 seconds.
-------------

Is this normal?
I dont know why s/he tried to log as user "?" .

TIA

+----------------------------------------------------------+
|            Nguyen Hung.Vu( vuhung@example.com )              |
| The University of Electro-Communications, Tokyo, Japan   |
+----------------------------------------------------------+
| Takeshi's small space   http://site.techviet.com/vuhung/ |
| Join KDE-i18n-Vi?       http://vi.i18n.kde.org/          |
| VYSA                    http://vysasports.vngate.net/    |
| Vn Linux Users Group    http://vietlug.sourceforge.net/  |
| Tokyo Linux Users Group http://www.tlug.gr.jp/           |
+----------------------------------------------------------+