From owner-freebsd-questions@FreeBSD.ORG Fri Oct 23 17:08:11 2009 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id EA777106566B for ; Fri, 23 Oct 2009 17:08:11 +0000 (UTC) (envelope-from cswiger@mac.com) Received: from asmtpout012.mac.com (asmtpout012.mac.com [17.148.16.87]) by mx1.freebsd.org (Postfix) with ESMTP id D45988FC1A for ; Fri, 23 Oct 2009 17:08:11 +0000 (UTC) MIME-version: 1.0 Content-transfer-encoding: 7BIT Content-type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Received: from cswiger1.apple.com ([17.227.140.124]) by asmtp012.mac.com (Sun Java(tm) System Messaging Server 6.3-8.01 (built Dec 16 2008; 32bit)) with ESMTPSA id <0KRZ003898XMUJ70@asmtp012.mac.com> for freebsd-questions@freebsd.org; Fri, 23 Oct 2009 10:08:11 -0700 (PDT) Message-id: <18641935-9899-495F-9465-A7A10AA6A6D8@mac.com> From: Chuck Swiger To: Sean Cavanaugh In-reply-to: Date: Fri, 23 Oct 2009 10:08:10 -0700 References: <200910231717.AA243925902@mail.Go2France.com> X-Mailer: Apple Mail (2.936) Cc: "freebsd-questions@freebsd.org" Subject: Re: DNS Question X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 23 Oct 2009 17:08:12 -0000 Hi-- On Oct 23, 2009, at 9:18 AM, Sean Cavanaugh wrote: >> worse, it's illegal. > > how is this illegal? if you are residing your domain on a hosting > service, this makes sense to me. Granted its bad form and should > have an A record to the host for the main domain record, but if i > had control over "otherdomain.com" and not "example.com" and had to > change the IP address, "example.com" would be dead until i was able > to reach the owner of that domain and have them change their DNS info. You aren't supposed to use CNAMES for anything found in other RR's; in particular, you should always use an A record with the hostnames used for nameservers (ie, have an NS record), because you are supposed to be using the canonical name rather than an alias. See: http://docstore.mik.ua/orelly/networking/sendmail/ch21_03.htm#SML2-CH-21-SECT-3-2 You might also find a discussion of webserver redirects and the like interesting: http://www.aitechsolutions.net/cname-serveralias-redirection.html Regards, -- -Chuck PS: It's odd where google pulls up references to fairly canonical docs, sometimes. I'm not sure I even recognize "ua", and I suspect I deal with two-letter ISO 3166 country names more than most folks do. Maybe Ukraine? :-)