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[Full-Disclosure] IIS 5.0 random/fixed TCP/UDP ports



When viewing the ports associated with inetinfo.exe (Windows 2000 Server with 
IIS 5.0 in a default configuration) using TCPView I see port 80 (TCP) , 443 
(TCP), another TCP strange and random port and one UDP port (3456)
 
Example in one machine:
TCP 80
TCP 443
TCP 1055
UDP 3456
 
Example in another machine:
TCP 80
TCP 443
TCP 2086
UDP 3456
 
Already tried to connect to the random TCP port, and write to it, but the 
server does not return a thing.
What are the random TCP and fixed UDP port for?
 
Tiago Halm

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