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Content preview: I have found that the RPC service in Windows also uses
TCP ports 1025-1030 for communication with domain controllers (DCs). I
found this out by accident by blocking ports in my Windows 2003 domain
and observing failed RPC connectivity using netdiag command on clients.
I also observed attempts at connection on TCP port 1025. [...]
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--- Begin Message ---
I have found that the RPC service in Windows also uses TCP ports 1025-1030
for communication with domain controllers (DCs). I found this out by
accident by blocking ports in my Windows 2003 domain and observing failed
RPC connectivity using netdiag command on clients. I also observed attempts
at connection on TCP port 1025.
Once I added TCP port 1025 to my list of allowed ports and ran netdiag, a
connection on the DC port 1025 and the client (higher port number) was
established.
Is this another possible attack vector? I have not had time to test it
myself, which is why I am asking.
Regards,
Edward W. Ray
SANS GCIA, GCIH
_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.netsys.com/full-disclosure-charter.html
--- End Message ---
