Date: Thu, 12 Feb 2004 14:55:49 -0800 From: "Evan Dower" <evantd@hotmail.com> To: Barbish3@adelphia.net, freebsd-questions-local@be-well.ilk.org Cc: freebsd-questions@freebsd.org Subject: RE: hostname and dhcp Message-ID: <BAY8-F87qeo25S7KmK50004be8b@hotmail.com>
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I guess I just won't worry about it then. It only prevents me from using send-pr (and in fact, I think I still wouldn't be able to use it because I'm pretty sure my smtp server requires me to log in), and every once in a while I have to change it in order for sshd, freenet6, and httpd to start. That part is very odd, actually. I had hostname="lojak.washington.edu" but recently things decided they didn't like that, so I changed it to hostname="lojak" and then it worked, but when I rebooted a few days later, I had to change it back. Then again, my system seems to have a number of unusual and inexplicable quirks. Thanks for all your help, (now if I could only get cdparanoia working again...) -- Evan Dower Undergraduate, Computer Science University of Washington Public key: http://students.washington.edu/evantd/pgp-pub-key.txt Key fingerprint = D321 FA24 4BDA F82D 53A9 5B27 7D15 5A4F 033F 887D >From: "JJB" <Barbish3@adelphia.net> >Reply-To: <Barbish3@adelphia.net> >To: "Evan Dower" ><evantd@hotmail.com>,<freebsd-questions-local@be-well.ilk.org> >CC: <freebsd-questions@freebsd.org> >Subject: RE: hostname and dhcp >Date: Thu, 12 Feb 2004 14:20:55 -0500 > >If I understand you correctly, you are talking about your system >which is connected to the public internet, and you are using the >FBSD built in DHCP client to get an lease from your ISP. Now if you >are an commercial user with an officially registered domain name and >static ip address from your ISP, Your ISP has you in their DHCP >server with your FQDN and it's being sent to your system when you >get an new lease. The FBSD built in DHCP client is not configured to >accept that info which will auto populate the hostname= environment >variable. Install the DHCP package on you system and configure It's >client to accept that info. > >If you are not an commercial user, then the host name the ISP uses >for you is meaningless to you. If you have officially registered >domain name then use that in your hostname= statement, like this, >hostname="cyberbaby.com", then that FQDN will be what sendmail uses >for all the users on your LAN. Then use DHCP server to pass the >major FQDN to all LAN PC, and those systems will append to the front >their system names and tell your DHCP server their full name. > >If you do not have LAN or officially registered domain name, then >all you need, is to meet the domain nameing convention, >something.com and you are all set go. IE: >hostname="home.FBSDyourLastName.com". > >As far as reverse lookup goes, that is only on officially registered >domain names, either yours, which really happens at the registry >hosting your domain name, or at the ISP if your using their email >servers. > >On your system the value you use in hostname= should also be in the >/etc/hosts file like this > ># >::1 localhost localhost.my.domain >127.0.0.1 localhost home.FBSDyourLastName.com FBSDyourLastName.com ># > > >Hope this helps > >Joe > > > >-----Original Message----- >From: owner-freebsd-questions@freebsd.org >[mailto:owner-freebsd-questions@freebsd.org]On Behalf Of Evan Dower >Sent: Thursday, February 12, 2004 1:15 PM >To: freebsd-questions-local@be-well.ilk.org >Cc: freebsd-questions@freebsd.org >Subject: Re: hostname and dhcp > >Hmm... That is what I expected it to do, but when I tried it, I >ended up >with an empty hostname. Of course, I don't remember now if I >commented out >that line or just set it to empty. Actually, looking at >/etc/defaults/rc.conf I see that if I comment it out in /etc/rc.conf >it gets >set to the empty string in the default, so it shouldn't matter. >Anyway, like >I said, I tried that and just ended up with an empty hostname. >Perhaps that >indicates something is wrong with my configuration... >Thanks very much for the help (any other ideas?), >-- >Evan Dower >Undergraduate, Computer Science >University of Washington >Public key: http://students.washington.edu/evantd/pgp-pub-key.txt >Key fingerprint = D321 FA24 4BDA F82D 53A9 5B27 7D15 5A4F 033F 887D > > > > > >From: Lowell Gilbert <freebsd-questions-local@be-well.ilk.org> > >To: "Evan Dower" <evantd@hotmail.com> > >CC: freebsd-questions@freebsd.org > >Subject: Re: hostname and dhcp > >Date: 12 Feb 2004 13:04:38 -0500 > > > >"Evan Dower" <evantd@hotmail.com> writes: > > > > > I've actually been running FreeBSD for quite a while now, but >I've > > > never known exactly how to handle this. In rc.conf, one must >specify a > > > hostname. If you're using DHCP to set up your network though, >your > > > FQDN (fully qualified domain name) can change without notice. It >seems > > > like a Good Idea to have your hostname be your FQDN, since some >things > > > will do a reverse lookup on your IP to verify that it matches >the > > > hostname you supplied. In particular I'm thinking of SMTP >servers > > > here. (send-pr doesn't work for me because my mail gets >rejected.) So, > > > when you're autoconfiguring your network interfaces, what should >you > > > put in rc.conf's hostname variable? Is there something else I >can do > > > that would allow me to have something nicer looking, but still >send my > > > FQDN when asked? > > > >If you don't set your hostname in rc.conf, dhclient should change >it > >for you when it finds out what it is. > > > >-- > >Lowell Gilbert, embedded/networking software engineer, Boston area: > > resume/CV at >http://be-well.ilk.org:8088/~lowell/resume/ > > username/password "public" > >_________________________________________________________________ >Check out the great features of the new MSN 9 Dial-up, with the MSN >Dial-up >Accelerator. http://click.atdmt.com/AVE/go/onm00200361ave/direct/01/ > >_______________________________________________ >freebsd-questions@freebsd.org mailing list >http://lists.freebsd.org/mailman/listinfo/freebsd-questions >To unsubscribe, send any mail to >"freebsd-questions-unsubscribe@freebsd.org" > _________________________________________________________________ Let the advanced features & services of MSN Internet Software maximize your online time. http://click.atdmt.com/AVE/go/onm00200363ave/direct/01/
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