Null Session

["Wbsony" <wbsony () gmail com>]

Hi all,

Recently, I did some testing on Windows hosts, and found things that 
confused me.

When I ran:

c:\>net use \\host\IPC$ "" /u:administrator
The command completed successfully.

It was successful, then I can connect to the registry of that particular 
host remotely.

At first, I thought it was because administrator's password was simply empty 
password.
However, when I ran similar command, with user name that didn't exist in the 
system, same result occured:

c:\>net use \\host\IPC$ "" /u:blablabla
The command completed successfully.

I thought maybe just null session issues, but the null session connection 
was unsuccessful:

net use \\host\IPC$ "" /u:""

(Sorry, I forgot the actual results shown, some kind of 'error occured' 
message).


Anybody encountered this situation before and could enlighten me?


Thanks in advance,
Wbsony