From owner-freebsd-questions@FreeBSD.ORG Sat Oct 10 17:56:23 2009 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 CDE101065694 for ; Sat, 10 Oct 2009 17:56:23 +0000 (UTC) (envelope-from wtf.jlaine@gmail.com) Received: from mail-fx0-f222.google.com (mail-fx0-f222.google.com [209.85.220.222]) by mx1.freebsd.org (Postfix) with ESMTP id 582878FC13 for ; Sat, 10 Oct 2009 17:56:22 +0000 (UTC) Received: by fxm22 with SMTP id 22so7277362fxm.36 for ; Sat, 10 Oct 2009 10:56:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:received:date:from:to:cc :subject:message-id:mail-followup-to:references:mime-version :content-type:content-disposition:in-reply-to:user-agent :x-operating-system; bh=wS5kI4vUS816VDszzKy9VZobS/XrKYVdr6SdHfjnz4c=; b=Sjnotj1hKIZjh3e1FlLbJ7cC5B7oaT68gOg1f/r5MEy/wz/0kvgwifTEUTsiGHl3GE 63DECm+8onOQEm16ulrBvdN0Lb9myd07Vf34mT1Z7hbrPDPspD5MepNCvupxjwDoY+uU nF+vl3vk/4Haf7EoXZ1VHPC9yi45L7f94MU4k= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:mail-followup-to:references :mime-version:content-type:content-disposition:in-reply-to :user-agent:x-operating-system; b=u6yl+icIFm+jk+ANd5saO+mBzGrudKpwWccsYPLHMm8TLXJmWb55qF+IH2NuojoESG V3ELBGAUu/x4INKqNJTDVrT63BjUCDMg70PS5II/F25ePZJsu7dZA+o3Ggt3XeNcqwE6 QK1j9BhPYK3+oJeLe/1t+pJO+U2hcWnw2Kd40= Received: by 10.204.26.147 with SMTP id e19mr3327996bkc.149.1255197381984; Sat, 10 Oct 2009 10:56:21 -0700 (PDT) Received: from aperture_lab ([77.66.145.99]) by mx.google.com with ESMTPS id 12sm3559200fks.8.2009.10.10.10.56.20 (version=SSLv3 cipher=RC4-MD5); Sat, 10 Oct 2009 10:56:20 -0700 (PDT) Received: by aperture_lab (sSMTP sendmail emulation); Sat, 10 Oct 2009 21:56:18 +0400 Date: Sat, 10 Oct 2009 21:56:18 +0400 From: Jeff Laine To: Kevin Kinsey Message-ID: <20091010175617.GA84102@free.bsd.loc> Mail-Followup-To: Jeff Laine , Kevin Kinsey , freebsd-questions@freebsd.org References: <4AD0C4D5.1060308@daleco.biz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4AD0C4D5.1060308@daleco.biz> User-Agent: Mutt/1.4.2.3i X-Operating-System: FreeBSD 8.0-BETA2 i386 Cc: freebsd-questions@freebsd.org Subject: Re: Tcpwrappers, sendmail, and unknown hosts... 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, 10 Oct 2009 17:56:23 -0000 On Sat,10-10-2009 [12:31:01], Kevin Kinsey wrote: > Seems like a lot of the spam we fight comes from > hosts with no DNS entries. What about using this? > > ---------------------------------- > > $grep sendmail /etc/hosts.allow > > sendmail : KNOWN : allow > sendmail : UNKNOWN : deny > > --------------------------------- > > Comments? anyone tried it? > Hi Kevin! What you need is 'require_rdns' feature. Also from my own expirience, dnsbl feature of Sendmail works great for spammers scum. -- Best regards, Jeff | "Nobody wants to say how this works. | | Maybe nobody knows ..." | | Xorg.conf(5) |