From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Lee Chin" Subject: Identifying computers behind a NAT Date: Mon, 07 Oct 2002 20:07:35 -0500 Sender: linux-net-owner@vger.kernel.org Message-ID: <20021008010735.8144.qmail@mail.com> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline List-Id: Content-Type: text/plain; charset="us-ascii" To: hahn@coffee.psychology.mcmaster.ca, linux-newbie@vger.kernel.org, linux-net@vger.kernel.org Hi, For billing and licensing reasons in our product, I need to be able to identify machines when they connect to our server... The issue that we have is that these machines may be behind a NAT firewall and we dont see the real IP of the machine... Is there any way at all to identify a socket connection as belonging to a certain machine other than just IP address? For example, would I be able to look at the TCP packets acknowledge numbers and that in combo with the IP would give me some idea of the machines behind the NAT? Thanks Lyle -- __________________________________________________________ Sign-up for your own FREE Personalized E-mail at Mail.com http://www.mail.com/?sr=signup "Free price comparison tool gives you the best prices and cash back!" http://www.bestbuyfinder.com/download.htm