From owner-freebsd-questions Fri Sep 29 7: 2:45 2000 Delivered-To: freebsd-questions@freebsd.org Received: from digitaldaemon.com (digitaldaemon.com [63.105.9.34]) by hub.freebsd.org (Postfix) with SMTP id BA30237B424 for ; Fri, 29 Sep 2000 07:02:38 -0700 (PDT) Received: (qmail 12631 invoked from network); 29 Sep 2000 14:00:31 -0000 Received: from unknown (HELO smartsoft.cc) (192.168.0.73) by digitaldaemon.com with SMTP; 29 Sep 2000 14:00:31 -0000 Message-ID: <39D4A0C2.2F93A24C@smartsoft.cc> Date: Fri, 29 Sep 2000 10:01:38 -0400 From: Jan Knepper Organization: Smartsoft, LLC X-Mailer: Mozilla 4.75 [en] (Windows NT 5.0; U) X-Accept-Language: en MIME-Version: 1.0 To: Jim Weeks Cc: Artem Koutchine , Andy Wolf , James Wyatt , Jan Knepper , freebsd-questions@FreeBSD.ORG, freebsd-isp@FreeBSD.ORG Subject: Re: DNS: having domain1.com and domain1.net point to the same IP. References: Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Jim Weeks wrote: > On Fri, 29 Sep 2000, Artem Koutchine wrote: > > > From: "Jim Weeks" > > > > > > On Fri, 29 Sep 2000, Andy Wolf wrote: > > > > > > > We use two A records now and therefor accept redundancy. The reverse > > lookup > > > > of course can only point to one of the labels. > > > > > > The general consensus throughout the industry seems to be that C names are > > > evil. > > > > > > I have never been bitten by just using A names. > > > > > > > I have. Revers lookup might fail and some secure smtp server and other > > daemons > > do not allow access if reverse lookup failes. For example: > > What type of smtp setup would fail because the reverse lookup name did not > match that of the virtual domain? > > Do you have an example of a daemon that would choke? No an example of a daemon that would choke, but UUnet didn't have my reverse-DNS setup so the reverse lookup's didn't work. For that reason I resend (this) messages, because I didn't see it appear on the list. Appearantly SMTP (as postfix) checks via a reverse lookup whether or not a host really exists. When it does not, it does not accept the message. Don't worry, be Kneppie! Jan -- Jan Knepper Smartsoft, LLC 88 Petersburg Road Petersburg, NJ 08270 U.S.A. http://www.smartsoft.cc/ http://www.mp3.com/pianoprincess Phone : 609-628-4260 FAX : 609-628-1267 FAX : 303-845-6415 http://www.fax4free.com/ Phone : 020-873-3837 http://www.xoip.nl/ (Dutch) FAX : 020-873-3837 http://www.xoip.nl/ (Dutch) In God we Trust -- all others must submit an X.509 certificate. -- Charles Forsythe To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message