From owner-freebsd-net@FreeBSD.ORG Wed Jul 31 19:16:08 2013 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id 7B2FA5B3 for ; Wed, 31 Jul 2013 19:16:08 +0000 (UTC) (envelope-from groundup2360917182914017@gmail.com) Received: from mail-wi0-x241.google.com (mail-wi0-x241.google.com [IPv6:2a00:1450:400c:c05::241]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 10BA7238B for ; Wed, 31 Jul 2013 19:16:07 +0000 (UTC) Received: by mail-wi0-f193.google.com with SMTP id j17so518318wiw.4 for ; Wed, 31 Jul 2013 12:16:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=+kSsXbmikAJAItBe9rSjEsxyN8dxis8fxGvith6KTac=; b=tpg5OWjrRrl7R4eAqIfKD83VJ+ux/RGarKzQaRVsH4H54UH3Io5aTgZurmDF0R1MY1 HgLBCNkd2Ic9/scnXKsA39FbbhlavJiily7atbOuy9nLDg4FYPX8PPozkGOjKtBzJg2v 9CLRrvCnkItitChZ+kHtLe01YVz0X/BGd0hfbJAqQKLd+nmu+pomfA07yj0SlgzFS+ay RjQMMNXD/2CUrBCCbP2+zRs2iptNsjgjv+SvMMkeUIimHJQexm+o8xUzSI1Ie6qrM37V zfRoIIRZmqY4q9nwaVJ+zAwEOsx9SZkLx2EqtMrkrMzt6bNOo0alRfuVNncOS36xdiIz lyfw== MIME-Version: 1.0 X-Received: by 10.180.24.197 with SMTP id w5mr5273110wif.25.1375298166161; Wed, 31 Jul 2013 12:16:06 -0700 (PDT) Received: by 10.216.212.138 with HTTP; Wed, 31 Jul 2013 12:16:06 -0700 (PDT) Received: by 10.216.212.138 with HTTP; Wed, 31 Jul 2013 12:16:06 -0700 (PDT) Date: Wed, 31 Jul 2013 15:16:06 -0400 Message-ID: Subject: Is a shellcode kernel network detector worth it? From: Anthony Brown To: freebsd-net@freebsd.org Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.14 X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 31 Jul 2013 19:16:08 -0000 Is a shellcode kernel network detector worth it. I was thinking about making a kernel module that would detect shellcode and then stop it from getting pass the kernel. I don't know if it is worth it though, because if the data in the packets is encrypted I won't be able to check for shellcode. Is it normal for must data coming from the network to not be encrypted?