From owner-freebsd-security Thu Mar 15 12:35:29 2001 Delivered-To: freebsd-security@freebsd.org Received: from eastwood.aldigital.algroup.co.uk (eastwood.aldigital.algroup.co.uk [194.128.162.193]) by hub.freebsd.org (Postfix) with ESMTP id 9C0F837B746 for ; Thu, 15 Mar 2001 12:35:18 -0800 (PST) (envelope-from adam@algroup.co.uk) Received: from algroup.co.uk (socks-fw.aldigital.co.uk [192.168.254.10]) by eastwood.aldigital.algroup.co.uk (8.8.8/8.6.12) with ESMTP id UAA14780; Thu, 15 Mar 2001 20:33:36 GMT Message-ID: <3AB1261F.23B8BE75@algroup.co.uk> Date: Thu, 15 Mar 2001 20:29:19 +0000 From: Adam Laurie Organization: A.L. Group plc X-Mailer: Mozilla 4.76 [en] (X11; U; FreeBSD 4.2-STABLE i386) X-Accept-Language: en MIME-Version: 1.0 To: Nate Williams Cc: Ronan Lucio , security@FreeBSD.ORG Subject: Re: Port 113 References: <006b01c0ad38$39eed0a0$1401a8c0@tedm.placo.com> <099801c0ad7c$75b63800$2aa8a8c0@melim.com.br> <15025.5630.472269.543769@nomad.yogotech.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-security@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Nate Williams wrote: > > > Could anybody say me when I need to allow the port 113 > > in the firewall? > > *Need* form auth is a strong word. However, it does tend to speed up > email transfers is you enable a version that always responds true. > > So, any external SMTP servers you have *should* have this port enabled. > > > What services use this port? > > I know that SMTP uses it, and I believe that ftpd uses it, and I believe > irc also uses it. smtp does not need to use it - you can achieve the same speedy transfers by telling your smtp server not to bother. e.g. for sendmail: O Timeout.ident=0s > > For example: I have a computer that is only DNS server, > > Does this port need allow connections the to DNS service work? > > I don't believe so, but someone will certainly correct me if I'm wrong. dns does not need ident. cheers, Adam -- Adam Laurie Tel: +44 (20) 8742 0755 A.L. Digital Ltd. Fax: +44 (20) 8742 5995 Voysey House http://www.thebunker.net Barley Mow Passage http://www.aldigital.co.uk London W4 4GB mailto:adam@algroup.co.uk UNITED KINGDOM PGP key on keyservers To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message