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RE: Interesting challenge
From: "Rajesh Jose" <rajesh.jose () paladion net>
Date: Sat, 31 Jan 2004 17:57:35 +0530

Sanjay,

Can you try telnetting to the server on port 80 and 443. 
Telnet www.yourclientserver.com 80.

Try nmap or any other syn port scanner to port 80 and 443 only.
nmap -P0 -sS -p 80, 443 www.yourclientserver.com

You should get a reply (syn/ack) from the server for both of the above
commands if the ports are open. 

In nessus vulnerability scan try giving the following settings

1) Scan only user specified range (Give common ports used by IIS and
Exchange)
2) Change "checks_read_timeout = " value in nessusd.conf or .nessusrc to
15 seconds (This will help if you are using a slow network link)

Regards,
Rajesh Jose, CISSP
 
Paladion Networks.
Ph: +91 22 55910513 / 27892889
Web: http://www.paladion.net
Mob: 098205 04308
 

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-----Original Message-----
From: Sanjay K. Patel [mailto:sanjay.patel () rexwire com] 
Sent: Saturday, January 31, 2004 3:26 AM
To: 'Clement Dupuis'
Cc: pen-test () securityfocus com
Subject: RE: Interesting challenge

 almost everyone who replied pointed towards icmp. We have tried running
the
test with icmp disabled. We still do not get a reply on those ports.

-SKP

-----Original Message-----
From: Clement Dupuis [mailto:cdupuis () cccure org] 
Sent: Friday, January 30, 2004 3:06 PM
To: 'Sanjay K. Patel'
Subject: RE: Interesting challenge

Have you carefully looked at some of the buried down setting under your
scanners.  It might simply be that it is expecting a reply from a ping
request before doing the scanning.  

Clement


-----Original Message-----
From: Sanjay K. Patel [mailto:sanjay.patel () rexwire com]
Sent: Friday, January 30, 2004 11:43 AM
To: pen-test () securityfocus com
Subject: Interesting challenge




We are doing a pen test for a client and have run into a interesting 
situation. The client has a server running IIS and Exchange we can
get to
it
through a browser but when we try to run Nessus or Eeye Retina
against
it,
neither product can find the server. The client is not running any
IDS
system has a simple firewall. A port scan revels no open port though
port
80
is open since the server is serving pages.


SKP




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