From owner-freebsd-questions Fri Oct 13 9: 3:42 2000 Delivered-To: freebsd-questions@freebsd.org Received: from itp.ac.ru (itp.ac.ru [193.233.32.4]) by hub.freebsd.org (Postfix) with ESMTP id D2FF737B502 for ; Fri, 13 Oct 2000 09:03:35 -0700 (PDT) Received: from itp.ac.ru (anis.itp.ac.ru [193.233.47.19]) by itp.ac.ru (8.9.1/8.9.1) with ESMTP id UAA14302 for ; Fri, 13 Oct 2000 20:03:35 +0400 (MSD) Message-ID: <39E73274.FFABE7AC@itp.ac.ru> Date: Fri, 13 Oct 2000 20:04:04 +0400 From: "Ivan S. Anisimov" Organization: Landau Institute for Theoretical Physics X-Mailer: Mozilla 4.72 [en] (X11; I; FreeBSD 3.2-RELEASE i386) X-Accept-Language: en MIME-Version: 1.0 To: questions@freebsd.org Subject: how to stop being scanned by nmap? Content-Type: text/plain; charset=koi8-r Content-Transfer-Encoding: 7bit Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Hello, I saw somewhere an undocumented option in kernel config that somehow refuses SYN & ACK requests that prevents software such as nmap from scanning the tcp stack. Any clues? Thanks in advance, Ivan To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message