Image
 
Latest Additions
 
EH-Net Login
Welcome Guest.






Lost Password?
No account yet? Register
Who's Online
We have 16 guests and 1 member online
EH-Net Donations

Enter Amount:
$

Google Ads
EH-Net News Feeds
Latest Additions
Book Recommendations





 
Advertisement

You are here: Home arrow Forum arrow Ethical Hacking Discussions and Related Certificationsarrow Network Pen Testingarrow OS Fingerprinting using ICMP - AFCEH Question
Ethical Hacker Community Forums
November 23, 2008, 10:29:24 AM *
Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with username, password and session length
News: ChicagoCon 2-Day Ethical Hacking Conference with MS Blue Hats Oct 31 - Nov 1. Tickets Only $100! www.chicagocon.com/content/view/103/51/
 
   Home   Help Calendar Login Register  
Pages: [1]   Go Down
  Print  
Author Topic: OS Fingerprinting using ICMP - AFCEH Question  (Read 2257 times)
0 Members and 1 Guest are viewing this topic.
Manu Zacharia (-M-)
Full Member
***
Offline Offline

Posts: 193



View Profile WWW
« on: July 07, 2006, 12:51:17 PM »

Hi Friends,

I am posting more questions that I have faced during my AFCEH course. Please discuss the same. The next question is:
Quote
In the OS Fingerprinting technique of using Ping and Traceroute, what is the mathematical calculation that one needs to perform?

1.   Final TTL Value + Number of Hops
2.   Final TTL Value + Number of Hops - 1
3.   Final  TTL Value + Number of Hops - Round Trip Time
4.   Initial TTL Value + Number of Hops
5.   Initial TTL Value + Number of Hops + Round Trip Time

Regards,

The Morpheus
Logged

Manu Zacharia
Certified ISO 27001:2005 (Information Security Management System) Lead Auditor
Promote the Information Security Day
Visit - http://www.informationsecurityday.com
Dengar13
Full Member
***
Offline Offline

Posts: 224



View Profile
« Reply #1 on: July 07, 2006, 02:10:36 PM »

Are we here to pass this for you?  Do you have any idea what the answer is or are you relying solely on us?
Logged

A+, Net+, MCP, CEH
MCSE: Security/Messaging
MCSA: Security/Messaging
Former U.S. Marine and damn proud of it!
Manu Zacharia (-M-)
Full Member
***
Offline Offline

Posts: 193



View Profile WWW
« Reply #2 on: July 07, 2006, 09:18:31 PM »

Hi Dengar and fellow friends,

If my frequent postings of questions have hurted any of the fellow members, I am extremely sorry for the same. My aim was to share the questions (especially the tricky questions) with the fellow forum members as it would be opening up new thinking dimensions for all wanna-be ethical hackers. If I did anything wrong, moderators - please point out the same.

Regarding the answers, as per the book Network Security - A Hacker's Perspective, it is given that the Initial TTL value of a data packet = Final TTL value of the packet + Number of routers in the path.

However, in the question it is not asking for the Initial TTL value, it is asking for just the mathematical calculation. So I think, the answer is (2). Since there are two options for the answer, I consider it as a tricky one and wanted to share it with the rest of the forum. If you or anybody felt that I have some other intentions, sorry for the same.

Regards,

The Morpheus
Logged

Manu Zacharia
Certified ISO 27001:2005 (Information Security Management System) Lead Auditor
Promote the Information Security Day
Visit - http://www.informationsecurityday.com
pcsneaker
Jr. Member
**
Offline Offline

Posts: 73


View Profile
« Reply #3 on: July 08, 2006, 04:48:32 AM »

Quote
Regarding the answers, as per the book Network Security - A Hacker's Perspective, it is given that the Initial TTL value of a data packet = Final TTL value of the packet + Number of routers in the path.

Quote
So I think, the answer is (2)

Quote
2.   Final TTL Value + Number of Hops - 1

Just read what you have posted and review your math...
Logged

MCSA:Security (W2k, W2k3)
MCSE:Security (W2k, W2k3)
CPTS, Network+
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.7 | SMF © 2006-2008, Simple Machines LLC
Joomla Bridge by JoomlaHacks.com
Valid XHTML 1.0! Valid CSS!
Page created in 0.046 seconds with 22 queries.
 
Sponsors

cwnp_moto__120x90.gif

Polls
During the most recent election, I:
 
Support EH-Net


Support EH-Net by
Buying all of your
Amazon items using
the search bar above.

cbtnuggets_logo_125.jpg
Try CBT Nuggets Free!
Recent Forum Topics
Vote For EH-Net

progenic.com
Click here to Vote!

Sadikhov.com
Top IT Cert Sites

binarica.com
Binarica Logo

Add to Technorati Favorites
technorati fave

 
         
Advertisement

© 2008 The Ethical Hacker Network
Joomla! is Free Software released under the GNU/GPL License.