From owner-freebsd-isp Sat Sep 15 1: 8:11 2001 Delivered-To: freebsd-isp@freebsd.org Received: from cx175057-a.ocnsd1.sdca.home.com (cx175057-a.ocnsd1.sdca.home.com [24.13.23.40]) by hub.freebsd.org (Postfix) with ESMTP id 57F6037B417 for ; Sat, 15 Sep 2001 01:08:05 -0700 (PDT) Received: from brian (cx175057-b.ocnsd1.sdca.home.com [24.13.23.147]) by cx175057-a.ocnsd1.sdca.home.com (8.11.6/8.11.3) with SMTP id f8F875W00749 for ; Sat, 15 Sep 2001 01:07:05 -0700 (PDT) (envelope-from bri@sonicboom.org) Message-ID: <00be01c13dbd$86a5a340$3324200a@sonicboom.org> From: "Brian" To: References: <20010915080113.985.qmail@web20101.mail.yahoo.com> Subject: Re: Mail Server - Round Robin Load Distribution Date: Sat, 15 Sep 2001 01:06:01 -0700 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4522.1200 Sender: owner-freebsd-isp@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org u can do multiple serfvers with the same mx preference, to achieve some distribution that way. Last I checked, using a cname for an mx record was a big nono, causing rfc memorizing internet purists all around to convulse madly.. Brian ----- Original Message ----- From: "Fabrizio Ravazzini" To: Sent: Saturday, September 15, 2001 1:01 AM Subject: Mail Server - Round Robin Load Distribution > Hello all,I'm doing a Mail server using two machines > which shares the same disk array via NFS > where there are the users maildirs > (Q-mail,vchkpw,courier-Imap,sqwebmail). > I want to make this cluster using DNS-RoundRobin. > Reading the book DNS&BIND (O'Reilly) page 274, if I > insert two A-Records with two CNAME I can make > the round Robin, but this for ftp,http or whatever > server,but I think NOT Mail Servers. > Reading at the beginning of the book,instead, in the > MX record section I understood that multiples > CNAME for Mail servers are invalid, so I can only put > two MX-record for two machines serving the same > domain, but in this way only the first of the two MX > serves the requests and when it goes > down the other takes care of the service. > So,the question is, can I still have load distribution > with a mail server? > Suppose that the service domain is mail.com, so you > can send mail for example to john@mail.com > and the two machine of the cluster are: > one.mail.com ( Ip: A.B.C.D ) > two.mail.com ( Ip: X.Y.Z.K ) > > Can I insert in DNS this following records?: > one.mail.com 60 IN A A.B.C.D > two.mail.com 60 IN A X.Y.Z.K > > mail.com 60 IN CNAME one.mail.com > mail.com 60 IN CNAME two.mail.com > > or have I to insert these?: > one.mail.com 60 IN A A.B.C.D > two.mail.com 60 IN A X.Y.Z.K > > mail.com IN MX one.mail.com > mail.com IN MX two.mail.com > > In the second case I don't have any Load Distribution, > all the traffic goes to the "one.mail.com" > till it goes down and that's not what I want. > Can someone help mein this dilemma? > or tell me how to do this type of load distribution? > Many thanks > > ______________________________________________________________________ > Do You Yahoo!? > Il tuo indirizzo gratis e per sempre @yahoo.it su http://mail.yahoo.it > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-isp" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message