From: GomoR (sfmlgomor.org)
Date: Wed Oct 05 2005 - 07:59:10 CDT

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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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