From owner-freebsd-security Thu Feb 14 4:44:41 2002 Delivered-To: freebsd-security@freebsd.org Received: from portal.eltex.ru (eltex-gw2.nw.ru [195.19.203.86]) by hub.freebsd.org (Postfix) with ESMTP id 4C00B37B400 for ; Thu, 14 Feb 2002 04:44:37 -0800 (PST) Received: (from root@localhost) by portal.eltex.ru (8.11.6/8.11.3) id g1ECiUO15855; Thu, 14 Feb 2002 15:44:30 +0300 (MSK) (envelope-from amil@eltex.ru) Received: from gadget (root@gadget.eltex.ru [195.19.198.14]) by portal.eltex.ru (8.11.6/8.11.3av) with SMTP id g1ECi4E15836; Thu, 14 Feb 2002 15:44:05 +0300 (MSK) (envelope-from amil@eltex.ru) Received: by gadget (ssmtp TIS-0.6alpha, 19 Jan 2000); Thu, 14 Feb 2002 15:34:21 +0300 Received: from undisclosed-intranet-sender id xmajV3200; Thu, 14 Feb 02 15:34:09 +0300 Message-Id: <200202141243.PAA05312@incredible.hq.eltex.ru> Date: Thu, 14 Feb 2002 15:43:50 +0300 From: Alexandr Alov To: Peter Pentchev Cc: freebsd-security@FreeBSD.ORG Subject: Re: about 113 port In-Reply-To: <20020214143702.A935@straylight.oblivion.bg> References: <200202141018.NAA05098@incredible.hq.eltex.ru> <20020214135052.A339@straylight.oblivion.bg> <200202141216.PAA05281@incredible.hq.eltex.ru> <20020214143702.A935@straylight.oblivion.bg> X-Mailer: stuphead ver. 0.5.3 (Wiskas) (GTK+ 1.2.8; FreeBSD 4.5-STABLE; i386) Mime-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Virus-Scanned: by Eltex TC 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 Hello ! Thank you. PPAA> This is a connection *attempt*, not an actual connection. PPAA> It is only an attempt, because there is nothing that listens PPAA> on port 113 on 10.0.0.2; therefore, the OS returns a TCP RST (reset) PPAA> packet, and a TCP client on 10.0.0.1 would get a 'connection PPAA> refused' error. PPAA> Many programs attempt connections to port 113 - mail servers, PPAA> IRC servers, some FTP servers.. If there is nothing that answers PPAA> such connection requests, the programs just go on, having received PPAA> no data. This is the way it should generally be :) (unless you happen PPAA> to use one of those picky-picky IRC servers that require an auth response; PPAA> but that's another topic for another day) In general, you should leave PPAA> things configured exactly the way they are now - nothing listening PPAA> on port 113. The network traffic that you are seeing is just somebody PPAA> *trying* to connect and failing - it is completely normal. PPAA> G'luck, PPAA> Peter -- Alexandr Alov System Engineer, Eltex TC Co. Saint-Petersburg, Russia. e-mail: amil198@eltex.ru www: www.eltex.net To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message