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RE: Interpreting the results of an NMAP scan
From: "Pete.LeMay" <pete.lemay () whro org>
Date: Fri, 24 Apr 2009 11:29:32 -0400

Small Business server has numerous websites available on it that may use
80 and 443. Being premium edition, they also are licensed for ISA which
may be running as a proxy for the internal machines. Otherwise, look for
Outlook Web Access, remote workplace, or the sharepoint intranet created
by most small business installs.

As for the Linksys, ideally remote admin is not enabled and it doesn't
answer to an outside ping. With premium edition, I would rely on ISA to
do firewall activities over a Linksys. The Linksys can be set to only
allow needed ports through, but that should just be the first layer. 

Pete

-----Original Message-----
From: listbounce () securityfocus com [mailto:listbounce () securityfocus com]
On Behalf Of Dan Fauxpoint
Sent: Wednesday, April 22, 2009 9:58 PM
To: security-basics () securityfocus com
Subject: Interpreting the results of an NMAP scan


Hello,

I am helping a small business owner to evaluate the quality of his IT
setup. This company has one server which runs Windows Small Business
Server 2003 R2 Premium Edition. This server hosts an Exchange instance
which takes care of incoming and outgoing emails.

I ran an namp scan (nmap -T4 -A -v -PE -PA21,23,80,3389 <IP_address>)
from a machine outside of the company network and got the results below.
I am wondering why ports 80 and 443 are open since the server does not
act as a web server. Also I am wondering if the Linksys router should be
visible from the outside world ...

If anybody could comment on this and make suggestions on how to improve
the security of that setup, I would appreciate it.

Cheers,
Dan.

Not shown: 990 closed ports
PORT     STATE    SERVICE      VERSION
25/tcp   filtered smtp
80/tcp   open     http         Microsoft IIS
|_ html-title: The page cannot be displayed
135/tcp  filtered msrpc
139/tcp  filtered netbios-ssn
143/tcp  open     imap         Microsoft Exchange Server 2003 imapd
6.5.7638.1
443/tcp  open     ssl/https?
|_ sslv2: server still supports SSLv2
|  html-title: Microsoft Outlook Web Access
|_ Requested resource was https://<...snipped...>
445/tcp  filtered microsoft-ds
993/tcp  open     ssl/imap     Microsoft Exchange Server 2003 imapd
6.5.7638.1
|_ sslv2: server still supports SSLv2
1723/tcp open     pptp         Microsoft (Firmware: 3790)
8081/tcp open     http         Linksys router http config (device model
BEFSR41/BEFSR11/BEFSRU31)
|  http-auth: HTTP Service requires authentication
|_   Auth type: Basic, realm = Linksys BEFSR41/BEFSR11/BEFSRU31
|_ html-title: 401 Authorization Required



      

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Penetration Tester exams, taught by an expert with years of real pen testing experience.

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