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The Null session attack occurs at which port?
139 and 445.
138
0
80 and 445
A Null Session attack uses the Windows "net" program to map a connection using a blank username and password. These connections would take place over port 139 (NetBIOS sessions services) or 445 (runs SMB over TCP/IP without NetBIOS).
http://www.dummies.com/programming/networking/null-session-attacks-and-how-to-avoid-them/
**** Excuse me, but a read of http://techgenix.com/anatomy-nul-attack/ recommends that the following ports be blocked:
TCP Port 135
UDP Port 137
UDP Port 138
TCP Port 139
TCP and UDP Port 445
In the light of this article maybe the question nand its answers should be rewritten? Hope this helps. ****
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