Re: OS Fingerprints

[GomoR <sfml () gomor org>]

On Tue, Oct 04, 2005 at 03:07:27PM +0100, BSK wrote:
> Dear All,
>
> Some time back I came across a document that listed a
> table with Operating systems and their TTL that helped
> identify an operating system.
>
> I've been trying to search that document on Internet
> and my machine but not successful yet. Can someone
> point me to that or similar document.
>
> Basically I'm looking for information which helps us
> identify the target operating system from its TTL
> field obtained while ping. The document for example
> listed that if the TTL is 128 its likely to be M$ and
> if its 64 its likely to be Cisco Router or switch.
>
> Await your reply.
>
> rgds,
> Bshan

  Hello,

  if you want a simple trick to do OS fingerprinting, I 
  suggest you to use the initial window size of a TCP session 
  establishement.

  If you use that, you can create a table for each OS I've 
  seen by parsing the file at:
  http://www.gomor.org/files/net-sinfp-db-export.txt

  Or better, use the database in SQLite format:
  DB Schema:
  http://www.gomor.org/files/net-sinfp-db-schema.ps
  DB:
  http://www.gomor.org/files/sinfp.db

  Or even better, use SinFP:
  http://www.gomor.org/cgi-bin/index.pl?mode=view;page=net_sinfp

  Best regards,

-- 
  ^  ___  ___    FreeBSD Network - http://www.GomoR.org/ <-+
  | / __ |__/          Systems & Security Engineer         |
  | \__/ |  \     ---[ zsh$ alias psed='perl -pe ' ]---    |
  +-->  Net::Packet <=> http://search.cpan.org/~gomor/  <--+

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