Return-Path: Delivered-To: apmail-httpd-users-archive@www.apache.org Received: (qmail 74248 invoked from network); 24 Jun 2009 13:10:18 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.3) by minotaur.apache.org with SMTP; 24 Jun 2009 13:10:18 -0000 Received: (qmail 45953 invoked by uid 500); 24 Jun 2009 13:10:25 -0000 Delivered-To: apmail-httpd-users-archive@httpd.apache.org Received: (qmail 45934 invoked by uid 500); 24 Jun 2009 13:10:25 -0000 Mailing-List: contact users-help@httpd.apache.org; run by ezmlm Precedence: bulk Reply-To: users@httpd.apache.org list-help: list-unsubscribe: List-Post: List-Id: Delivered-To: mailing list users@httpd.apache.org Received: (qmail 45925 invoked by uid 99); 24 Jun 2009 13:10:25 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 24 Jun 2009 13:10:25 +0000 X-ASF-Spam-Status: No, hits=1.2 required=10.0 tests=SPF_NEUTRAL X-Spam-Check-By: apache.org Received-SPF: neutral (nike.apache.org: local policy) Received: from [80.229.52.226] (HELO munin.local) (80.229.52.226) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 24 Jun 2009 13:10:14 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) by munin.local (Postfix) with ESMTP id B2CDE310546 for ; Wed, 24 Jun 2009 14:09:49 +0100 (BST) Mime-Version: 1.0 (Apple Message framework v753.1) In-Reply-To: <77676f120906230525j4ae79cack7463168028384e89@mail.gmail.com> References: <77676f120906230525j4ae79cack7463168028384e89@mail.gmail.com> Content-Type: text/plain; charset=US-ASCII; format=flowed Message-Id: <91B943E9-5867-4C57-A1E6-4F535192857E@webthing.com> Content-Transfer-Encoding: 7bit From: Nick Kew Date: Wed, 24 Jun 2009 14:09:49 +0100 To: users@httpd.apache.org X-Mailer: Apple Mail (2.753.1) X-Virus-Checked: Checked by ClamAV on apache.org Subject: Re: [users@httpd] How can I secure my apache server from DoS attack ? On 23 Jun 2009, at 13:25, Neelesh Gurjar wrote: > MaxClients 150 So slowloris only needs to make 150 connections to tie up your server! A simple raise to, say, 1500, would prevent a single slowloris machine bringing you down[1]. Though of course you're still vulnerable to DDoS: for that you might want to raise it higher and use traffic management. [1] for any of the machines I've tried it on - http://bahumbug.wordpress.com/2009/06/21/slowloris/ -- Nick Kew --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See for more info. To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org " from the digest: users-digest-unsubscribe@httpd.apache.org For additional commands, e-mail: users-help@httpd.apache.org