From owner-freebsd-questions@FreeBSD.ORG Sat Nov 24 16:04:56 2007 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id CF50616A417 for ; Sat, 24 Nov 2007 16:04:56 +0000 (UTC) (envelope-from jackqq@gmail.com) Received: from nz-out-0506.google.com (nz-out-0506.google.com [64.233.162.234]) by mx1.freebsd.org (Postfix) with ESMTP id A0B3213C469 for ; Sat, 24 Nov 2007 16:04:56 +0000 (UTC) (envelope-from jackqq@gmail.com) Received: by nz-out-0506.google.com with SMTP id l8so33017nzf for ; Sat, 24 Nov 2007 08:04:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; bh=xqXVvDrSAMelvuo5EFV0LpiHGktXwwq4A6qGKCoE4NY=; b=FBzvUjVr3BEJpUt2Lp3NfKjDeS1MnWnFtTjdUrthE+OXj5v1tVcveDzBezK+0wHl+aUvtgeHt2QusMg2VBxEyRJqRIiHFF1Nq3ZcO20U4FDyQCocTPns1zNmV4rkB3gKpw5WpI7ElgNjUGmiEZgdWafv+QzLst3qF9G/wYXU97Y= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=qUNg0sNp+q/PGpd33Ysc2urHm0fPtfFMGHjqe6Ni2k5g5sUGIAQLQbw+xJFsPm19Vet8u5ISkDTLnVKB9SFCF0xUgRpkyB9LjrdMn0Jy+DZSA8LSN8zbYm/IQmpFnMIYezWHaUB5aB1I+iktN0CIgubfqdPjQgWiyrb6Qp8fG6A= Received: by 10.142.214.5 with SMTP id m5mr43939wfg.1195918706583; Sat, 24 Nov 2007 07:38:26 -0800 (PST) Received: by 10.142.109.20 with HTTP; Sat, 24 Nov 2007 07:38:26 -0800 (PST) Message-ID: <53a565700711240738n1cecd432td03a9e00aa689d13@mail.gmail.com> Date: Sat, 24 Nov 2007 23:38:26 +0800 From: "Quan Qiu" To: "Zhang Weiwu" In-Reply-To: <47483686.3030400@realss.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Content-Disposition: inline References: <47483686.3030400@realss.com> Cc: freebsd-questions@freebsd.org Subject: Re: how to fight concurrent connection DOS attack to FreeBSD ftpd? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 24 Nov 2007 16:04:56 -0000 T24gTm92IDI0LCAyMDA3IDEwOjM0IFBNLCBaaGFuZyBXZWl3dSA8emhhbmd3ZWl3dUByZWFsc3Mu Y29tPiB3cm90ZToKPiBJIHJ1biBhIGZ0cCBzaXRlIHdoaWNoIGlzIGJlaW5nIGF0dGFja2VkIGJ5 IHNvbWVvbmUgd2hvIGlzc3VlIHNvbWUgMTAwMAo+IGNvbmN1cnJlbnQgY29ubmVjdGlvbiBmb3Ig ZG93bmxvYWRpbmcgYXMgYW5vbnltb3VzLiBIb3cgY2FuIEkgZmlnaHQgYmFjaz8KCj4KPiBJZiBm dHBkLmNvbmYgaXMgbm90IHRoZSByaWdodCBtYW51YWwgcGFnZSB0byByZWFkLCBjYW4geW91IHN1 Z2dlc3Qgd2hpY2gKPiBjb25maWd1cmF0aW9uIG1hbnVhbCB0byByZWFkIHRvIGZpZ2h0IGJhY2sg dGhpcyBhdHRhY2s/IFRoYW5rcyBpbiBhZHZhbmNlIQo+CgoKVHJ5IHdyYXBwaW5nIHlvdXIgZnRw ZCB1c2luZyBpbmV0ZC4gVGhlcmUgYXJlIHNvbWUgbGltaXRzIHRvIG1heCBjaGlsZApwcm9jZXNz ZXMgYW5kIG1heCBjb25uZWN0aW9ucyBwZXIgaXAgaW4gaW5ldGQuY29uZig1KS4gQW4gZXhhbXBs ZSBmb3IKdnNmdHBkOgoKZnRwICAgICBzdHJlYW0gIHRjcCAgICAgbm93YWl0LzUwLzEwCiAgICAg ICAgcm9vdCAgICAvdXNyL2xvY2FsL2xpYmV4ZWMvdnNmdHBkICAgICAgIHZzZnRwZAoKUmVmZXIg dG8gdGhlIGluZXRkLmNvbmYoNSkgbWFucGFnZSBmb3IgbW9yZS4KCgotLSAK6KOY5L26IChRSVUg UXVhbikgPGphY2txcUBnbWFpbC5jb20+Cg==