account names exposed!

From: Calvin Lai (clai[at]qdata[dot]com)
Date: 03/08/04 

Date: Mon, 8 Mar 2004 17:03:30 -0500

Hi all,

I have a computer w/ IPSec set on 135-139 plus FTP and Terminal Service as
blocked (except from a certain users w/ sepcific IP) already. However, I
still see a lot of attempts by those intruders from time to time in my even
log. The thing that concern me most is that they somehow able to fetch the
account names of my computer. Does anyone know where I should go for more
info this problem? Thanks a lot.

Calvin