From owner-freebsd-security Thu Mar 28 12:26:22 2002 Delivered-To: freebsd-security@freebsd.org Received: from cianet.cianet.ind.br (cianet.funcitec.rct-sc.br [200.135.30.155]) by hub.freebsd.org (Postfix) with ESMTP id 58ECF37B42A for ; Thu, 28 Mar 2002 12:26:02 -0800 (PST) Received: (from root@localhost) by cianet.cianet.ind.br (8.11.6/8.11.3av) id g2SKPxC73853; Thu, 28 Mar 2002 17:25:59 -0300 (BRT) (envelope-from heberle@cianet.ind.br) Received: from cianet.funcitec.rct-sc.br (bkcv8r036t675pox@cianet.funcitec.rct-sc.br [200.135.30.155]) by cianet.cianet.ind.br (8.11.6/8.11.3avav) with ESMTP id g2SKPlq73839; Thu, 28 Mar 2002 17:25:47 -0300 (BRT) (envelope-from heberle@cianet.ind.br) Date: Thu, 28 Mar 2002 17:25:47 -0300 (BRT) From: Alvaro Pereira To: Moti Levy Cc: freebsd-security@freebsd.org Subject: Re: How can I erase my fingertips . In-Reply-To: <056f01c1d694$12084400$fd6e34c6@moti> Message-ID: <20020328172259.C73793-100000@cianet.cianet.ind.br> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Virus-Scanned: by AMaViS perl-11 Sender: owner-freebsd-security@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org hi, from /usr/src/sys/i386/conf/LINT # # TCP_DROP_SYNFIN adds support for ignoring TCP packets with SYN+FIN. This # prevents nmap et al. from identifying the TCP/IP stack, but breaks support # for RFC1644 extensions and is not recommended for web servers. # options TCP_DROP_SYNFIN #drop TCP packets with SYN+FIN I hope it is what you need. cya Alvaro On Thu, 28 Mar 2002, Moti Levy wrote: > I want to stop nmap from detecting my os . > > > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-security" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message