Re: how nmap can know my firewalled servers ?

[Gregory Boyce <gboyce () akamai com>]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Alice Bryson wrote:
> Yes, i agree that.
> How about UDP, if an udp port firewalled, how does NMAP know it?

I believe with UDP scanning you're either going to get a result of
closed (System responded with an ICMP port unreachable), or
Open|Filtered meaning that no response was received which could mean
filtering or something listening and not responding.

- --
 Gregory Boyce | gboyce () akamai com
 Security Operations  -  Team Lead
 Akamai Technologies | 617-444-3041
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.1 (GNU/Linux)
Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org

iD8DBQFEPpXjRy7J/ecQa/MRAhN+AJ0cuQET4ZYOVTc/NCyXrKjNRWu61gCgggRr
7g2NiifGckOO++pz3MB3++M=
=LjVS
-----END PGP SIGNATURE-----

-------------------------------------------------------------------------
This List Sponsored by: Webroot

Don't leave your confidential company and customer records un-protected. 
Try Webroot's Spy Sweeper Enterprise(TM) for 30 days for FREE with no 
obligation. See why so many companies trust Spy Sweeper Enterprise to 
eradicate spyware from their networks.
FREE 30-Day Trial of Spy Sweeper Enterprise

http://www.webroot.com/forms/enterprise_lead.php
--------------------------------------------------------------------------