Search Again: Re: ''A'' vs ''CNAME'' From: Bennie Warren Date: Tuesday, November 25, 1997 Time: 2:23:00 pm >>At 2:49 AM -0700 11/21/97, Arthur Elsenaar wrote: >>>Dag John Irving, >>> >>> >>>> Don't I need an A record for both "mycompany.com" *and* "www.mycompany.com" >>>> that point to my webserver so that users may request either via a web >>>> browser? I didn't see any entries for "mycompany.com" that point to an IP >>>> address in the QDNS examples. Presumably, both should point to the same IP, >>>> or does QDNS resolve this automatically? >>> >>>It's perfectly ok to have more than one name pointing to the same IP >>>address, so the setup in your example would be like: >>> >>>mycompany.com IN A 123.123.123.123 >>>www.mycompany.com IN A 123.123.123.123 >>> >>>and possibly >>>ftp.mycompany.com IN A 123.123.123.123 >>> >>>Of course PTR records for reverse lookups can only point to one name. This part of PTR records for reverse lookups. I have multiple domains. I created a primary DNS for each with its own mx record. They all point to 207.126.88.5. I also did this in the reverse lookup. The problem I am having is if you do a lookup on 207.126.88.5 you come up with a different name many times. Also some places are stopping mail because they do a reverse lookup and get many different names. Any ideas on this? >>> >>>In the setup for my domain, I have multiple names pointing to the same IP >>>address of our mailserver; pop.x.x, mail.x.x, smtp.x.x and just x.x . This >>>way I don't have to train employees and students to use one name, they can >>>use any logical name. >> >>Getting a bit theoretical here, what's the advantage of using 'A' records >>for the www host instead of a CNAME record? > >In the case above, you can use either CNAME or A records for >www.mycompany.com and ftp.mycompany.com. This is often an administration >issue. For example, if you move the host to a new IP address, you would >only have to change one record instead of three if you use the CNAME >approach. > > > ************************************** Bennie Warren /\ LemooreNet / / 320 West D Street / / Lemoore, CA 93245 / / /\ /\ Phone: 209.924.5909 / /_ _ / \ / / Fax 209.924.9578 \ _ _ / /\ \/ / bennie@lemoorenet.com / / \ / http://www.lemoorenet.com /_/ \/ **************************************

Messages In This Thread: ''A'' vs ''CNAME'' by Marconi on Nov 25, 1997 at 1:35:00 am Re: ''A'' vs ''CNAME'' by Sigurdur Ragnarsson on Nov 25, 1997 at 10:09:00 am Re: ''A'' vs ''CNAME'' by Bennie Warren on Nov 25, 1997 at 2:23:00 pm Re: ''A'' vs ''CNAME'' by Sigurdur Ragnarsson on Nov 25, 1997 at 3:22:00 pm Re: ''A'' vs ''CNAME'' by Bennie Warren on Nov 25, 1997 at 3:54:00 pm Re: ''A'' vs ''CNAME'' by Sigurdur Ragnarsson on Nov 25, 1997 at 6:11:00 pm