Date: Fri, 21 Nov 2003 10:35:39 -0500 (EST) From: Jerry McAllister <jerrymc@clunix.cl.msu.edu> To: lukek@meibin.net (Luke Kearney) Cc: freebsd-questions@freebsd.org Subject: Re: hostnames and interfaces Message-ID: <200311211535.hALFZef19409@clunix.cl.msu.edu> In-Reply-To: <20031121141516.0841.LUKEK@meibin.net> from "Luke Kearney" at Nov 21, 2003 02:25:12 PM
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> > On Thu, 20 Nov 2003 20:42:33 -0500 > Marty Landman <MLandman@face2interface.com> granted us these pearls of wisdom: > > > At 08:17 PM 11/20/2003, paul van den bergen wrote: > > > > >to expand on this, there is a potential many to many relationship here > > >between > > >host names and IP addresses (strickly speaking that is what dns etc sees?) > > > > > >how dose BSD define this? how does one define this using BSD? > > > > Hey, sounds like you understand things so well you see the void in the > > forest. As a newbie I'm still just trying to keep my head from twisting off > > at long enough intervals to define some of the questions. Like, given I > > have 5 boxes - 1 fbsd 4 windoz though maybe that proportion will change in > > a time :) - and each has their own ip adr and I have two apaches installed > > does that mean I can setup a max of 5 different domain level websites on my > > intranet? Or 10? Or infinite (well, this is reality I hope so...) > > > > The daemons are afoot, my ponderings do not affect them. > > Hi, > Let me see if I can shed some light on this issue for you. To the best > of my knowledge a FBSD system can have only one hostname however it can > have as many aliases as you wish. The setup of aliases is acheived via > DNS rather than assigning hostnames per interface. Where you have > multiple machines you would assign multiple hostnames whether they be > from different domains or not. > > $ host mail.meibin.net > mail.meibin.net is a nickname for kyoto.meibin.net > kyoto.meibin.net has address 220.111.132.28 > > per the above the actual host name for the system is kyoto, it's FQDN is > kyoto.meibin.net and it has the alias of mail.meibin.net rather than the > host name of mail.meibin.net . > > Apache and loads of other software support virtual hosting and defining > a name in an apache configuration has little to do with the actual > underlying system hostname. That being said virtual hosts don't work > well if DNS was not set correctly for them. You can also configure your NIC to answer to multiple IP addresses and then configure your Apache to treat each as a virtual host with a separate hostname/URL. Yes, you have to have whoever is serving DNS for you (either yourself, your ISP or some DNS service) set up to translate IP <-> hostname and if it involves a new Domain name, you have to register it with the appropriate registering agency. Most of our sites use a separate IP for each virtual host for various reasons. But, you can also have multiple aliases per IP address as the poster indicates. ////jerry > > HTH > > LukeK > > _______________________________________________
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