From owner-freebsd-security Fri Dec 14 17:53:18 2001 Delivered-To: freebsd-security@freebsd.org Received: from pintail.mail.pas.earthlink.net (pintail.mail.pas.earthlink.net [207.217.120.122]) by hub.freebsd.org (Postfix) with ESMTP id 2811837B41B for ; Fri, 14 Dec 2001 17:53:14 -0800 (PST) Received: from dialup-209.245.137.160.dial1.sanjose1.level3.net ([209.245.137.160] helo=blossom.cjclark.org) by pintail.mail.pas.earthlink.net with esmtp (Exim 3.33 #1) id 16F40m-0001v9-00; Fri, 14 Dec 2001 17:53:13 -0800 Received: (from cjc@localhost) by blossom.cjclark.org (8.11.6/8.11.3) id fBF1rAM05257; Fri, 14 Dec 2001 17:53:10 -0800 (PST) (envelope-from cjc) Date: Fri, 14 Dec 2001 17:53:10 -0800 From: "Crist J . Clark" To: Carlos Andrade Cc: security@FreeBSD.ORG Subject: Re: okay now I am worried Message-ID: <20011214175310.D3473@blossom.cjclark.org> References: <000001c184f6$133d72e0$fa01a8c0@rjstech.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <000001c184f6$133d72e0$fa01a8c0@rjstech.com>; from carlos@rjstech.com on Fri, Dec 14, 2001 at 04:21:35PM -0700 X-URL: http://people.freebsd.org/~cjc/ Sender: owner-freebsd-security@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org On Fri, Dec 14, 2001 at 04:21:35PM -0700, Carlos Andrade wrote: > The following has been in my log for a few days : > -x86 FreeBSD 4.2 machine (btw) > -logging in vain is turned on > -the only thing I am running is natd (gateway for our company) and very few > ports are specifically left open > -I do not allow inside traffic to go in to the outside nic (and vice versa) > to stop spoofing > -I specifically blocked ports 135, 139, 3389, 6667, 6668 cause nmap said > that they were responding or open for some reason. > > (date) /kernel: Connection attempt to UDP 127.0.0.1:512 from 127.0.0.1:XXXX biff(1). Compare the date to times of mail delivery in /var/log/maillog. > where XXXX has been the following : > 1389, 1396, 1523, 1530 Ephemeral ports. Expected. [snip] > running ps -auwx | sort | uniq returns Hmmm. The uniq(1) is somewhat pointless since each line is guaranteed unique due to the PID. [snip] > reading up on the ports udp 512 is biff, but I am not running any mail > server. The only mail I get is generated by daily reports in cron. Which delivers mail locally and will do the old biff(1) thang. > so am I crazy or ? Dunno if you are crazy, but there is nothing suspicious here. -- "It's always funny until someone gets hurt. Then it's hilarious." Crist J. Clark | cjclark@alum.mit.edu | cjclark@jhu.edu http://people.freebsd.org/~cjc/ | cjc@freebsd.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message