[CentOS] OT: Strange message in root e-mail possiablly hacked!!! Not sure??

Morning all,

Little back ground.  Running CentOS 5.3 fully update.  I basically run 
this as router and gateway for home network.  I have two(2) winblows 
machines hooked up.  I am running samba for shares.   I opened up root's 
mail this morning and found this strange little comment :

Connections Denied:
    lib/access.c:check_access(327)  58.239.84.158 : 1 Time(s)
    smbd/process.c:process_smb(1062) 58.239.84.158 : 1 Time(s)

So I started looking around in /var/log.  I looked at my secure logs and 
saw nothing out of the ordinary.  I looked in samba and found a log file 
58.239.84.158.log.  I opened it up and it said the following:

[2009/08/15 06:31:34, 0] lib/access.c:check_access(327)
  Denied connection from  (58.239.84.158)
[2009/08/15 06:31:34, 1] smbd/process.c:process_smb(1062)
  Connection denied from 58.239.84.158

There is nothing on this server that I can not replace.  Did I just get 
hacked?  Should I wipe this thing and start over?  Any and all advice is 
greatly appreciated!!!

Thanks.

Lee Perez