RE: Windows File Sharing

["Shota Gedenidze" <security () tub ge>]

Hi there,


I think for file & printer sharing will be enough to open following:

135 tcp/udp - this is for endpoint resolution;
137 tcp/udp - this is name service for netbios, since our computer needs
to answer name requests.
138 udp - this for datagram service
139 tcp - this is netbios session

and 445 tcp/udp if running win2k for RPC server.



-----Original Message-----
From: Adrian Soetanto [mailto:adrian () peter petra ac id] 
Sent: Friday, August 22, 2003 5:56 AM
To: security-basics () securityfocus com
Subject: Windows File Sharing

Hi,

I want to ask some question about TCP/UDP ports.

Suppose i've blocked all outgoing traffic to any ports, what port
numbers 
do i need to open for making a file sharing connection in a LAN?

My computer just acts as a client that doesn't share any files, but it 
does take a file from others, how can i make it?

What is the function of these ports?
135, 137, 138, 139 & 445

--
Thank You,
 Adrian


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