From owner-freebsd-questions@FreeBSD.ORG Tue Jun 4 18:56:47 2013 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id 465C26EE for ; Tue, 4 Jun 2013 18:56:47 +0000 (UTC) (envelope-from gobble.wa@gmail.com) Received: from mail-bk0-x229.google.com (mail-bk0-x229.google.com [IPv6:2a00:1450:4008:c01::229]) by mx1.freebsd.org (Postfix) with ESMTP id C85E61695 for ; Tue, 4 Jun 2013 18:56:46 +0000 (UTC) Received: by mail-bk0-f41.google.com with SMTP id jc3so383845bkc.28 for ; Tue, 04 Jun 2013 11:56:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=9yeH7BEtoMuJP9k58uzATHbwqnj2h+8TS8IzZWJOonA=; b=zrdQH5wlUO5uRhgOH8yN29Cwn1HJ6O0W/8c+FADfPTFCP/FOQv9cTNVQkKtNYQzxSj QZF4DVfQY+xM9XahvJr+aW1bDQ+Ca/A8jQCLGrojYUdFxnWqT6HXTE2sQpW0fbZtLr85 VRU+D+G1hjBp4fvtGh15JOonloBYTXctbZn++1MOvL546LZDxmYePNRMx6go8OUYK/ku V2TjyPJCNNOgaSIxvbX3JJChL/0eLQHnKOT1i6XiYf3flucujC7rXuiAmvLfKvTQ/ORw ArwkQTWvKxPf63KWLqjyNHmabmc3VZ4EmLb9mLsbBES7heNRGUE0cuHw/tP1rhhBQhmQ HvNg== MIME-Version: 1.0 X-Received: by 10.204.235.73 with SMTP id kf9mr6912997bkb.136.1370372205762; Tue, 04 Jun 2013 11:56:45 -0700 (PDT) Received: by 10.204.184.8 with HTTP; Tue, 4 Jun 2013 11:56:45 -0700 (PDT) Received: by 10.204.184.8 with HTTP; Tue, 4 Jun 2013 11:56:45 -0700 (PDT) In-Reply-To: <51AE0C04.2050507@tundraware.com> References: <51AE0C04.2050507@tundraware.com> Date: Tue, 4 Jun 2013 11:56:45 -0700 Message-ID: Subject: Re: Can sasl/sendmail Report IP Of Failed Access? From: Waitman Gobble To: tundra@tundraware.com Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.14 Cc: freebsd-questions@freebsd.org X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 04 Jun 2013 18:56:47 -0000 On Jun 4, 2013 9:00 AM, "Tim Daneliuk" wrote: > > I am seeing login dictionary attacks on a FreeBSD mail server being > reported. Is there a way to determine the IPs that are doing this > so they can be blocked at the firewall? auth.log only > notes the attempted user name, not the IP of origin. > -- > ----------------------------------------------------------------------- > Tim Daneliuk > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to " freebsd-questions-unsubscribe@freebsd.org" On Jun 4, 2013 9:00 AM, "Tim Daneliuk" wrote: > > I am seeing login dictionary attacks on a FreeBSD mail server being > reported. Is there a way to determine the IPs that are doing this > so they can be blocked at the firewall? auth.log only > notes the attempted user name, not the IP of origin. > -- > ----------------------------------------------------------------------- > Tim Daneliuk > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to " freebsd-questions-unsubscribe@freebsd.org" one idea is to run auth on a different service / machine on a non-standard port, that at least cuts down the noise from "non-targetted" scans. Waitman Gobble San Jose California USA