RE: Windows shares ...!!!!

From: Douglas Gullett (dougg03@comcast.net)
Date: 04/05/02 

Date: Thu, 04 Apr 2002 21:19:18 -0500
From: Douglas Gullett <dougg03@comcast.net>
To: SECURITY-BASICS@securityfocus.com

Your ISP, like myself, probably think you are a hacker. They probably shut
down your access to those ports. Or maybe your "friends" have installed a
firewall and forgot to let you have access. Maybe you can have your
"friends" install a Trojan that will open a different port for you to telnet
to.

-----Original Message-----
From: Bassam ALHUSSEIN [mailto:bhussein@scs-net.org]
Sent: Tuesday, March 26, 2002 6:41 PM
To: SECURITY-BASICS@securityfocus.com
Subject: Windows shares ...!!!!

Hello all ....
I am connected to the internet through a dialup-modem connection to an ISP.
this ISP gives its users dynamical IPs (non routable and it is applying
NAT).
I installed microsoft network client because I used to use windows shares on
other users' machines (friends). this is done by doing a scan on netbios
ports on the ips of those machines 10.0.0.x .
I used to find dosens of machines with windows shares.

suddenly, it's been several days, I can find no more machines with shares
....!! the scanner gives nothing. I thought it's a problem with my ms
network client, so I reinstalled it. Still nothing ...
I even used "nbtstat -A 10.0.0.x" from a DOS prompt for some IPs within that
scope, but it gave " host not found ". But it gave something when I used it
for my IP ......
To be more sure, I called a friend that I used to have access to his shares,
and I asked to him to connect. We made a chat and he gave me his actual IP,
so I made that nbtstat to his IP. But it gave "host not found". He was sure
that his netbios ports (137-139) was opened and listening.
By the way, he couldn't neither see me with that "nbtstat -A myIP".
What could the problem be ?? I don't understand....I am a real newbie
.......:-(

Can the ISP do something to prohibit the access to windows shares between
machine weithin it's local network ???????????? how can this be done ???

thanx verymuch for answering ...( I LOVE DETAILS if you have the time)

Bisso

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