Date: Sat, 06 Sep 2008 22:07:40 -0500 From: Kevin Kinsey <kdk@daleco.biz> To: freebsd-questions <freebsd-questions@freebsd.org> Cc: Andrew Falanga <af300wsm@gmail.com> Subject: Re: mail server DNS configuration questions Message-ID: <48C3457C.6070301@daleco.biz> In-Reply-To: <200809061928.28539.af300wsm@gmail.com> References: <200809061928.28539.af300wsm@gmail.com>
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Andrew Falanga wrote: > Hi, > > Well, my clients at church are still having issues and after working with > George, a respondant to my original questions, I think that most, if not all, > of my problems are related to DNS and how we've got it improperly configured. > > First, a crude drawing of how our mail server exists in the world: > > 192.168.2.x/24 72.24.23.252 "lot's of networks" > Private Network <--> CableOne <--> Internet > > Now, our mail server's IP is 192.168.2.23. On the router, he (the person at > whose house the mail server is) has IP forwarding setup so that mail get's > sent to our FreeBSD machine. Using dig, here's the responses: > > (from my FBSD machine at home, not the server) > [/usr/home/andy] > -> dig +short -t MX whitneybaptist.org > 10 mail.whitneybaptist.org. > [/usr/home/andy] > -> dig +short -t A whitneybaptist.org > 72.24.34.252 > [/usr/home/andy] > -> dig +short -x 72.24.34.252 > 34-252.72-24-cpe.cableone.net. > > (from the church FBSD machine) > [/home/afalanga] > -> hostname > whitbap > [/home/afalanga] > -> ifconfig fxp0 > fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 > options=8<VLAN_MTU> > inet 192.168.2.23 netmask 0xffffff00 broadcast 255.255.255.255 > ether 00:d0:b7:74:87:48 > media: Ethernet autoselect (100baseTX <full-duplex>) > status: active > [/home/afalanga] > -> cat /etc/resolv.conf > search McCutchanLAN > nameserver 192.168.2.1 > > > It doesn't take a rocket scientist, or a computer scientist, to figure out > we've got DNS issues. I'm thinking that I should setup a domain within the > 192.168.2.0/24 network on this box. I've done this before, at work. The > question I've got is I've never actually integrated a domain like this to a > domain on the Internet. I'm thinking that we'll setup something like: > internal.whitneybaptist.org with hosts in that sub-domain. > > So, what would my DNS tables need to look like to make this happen. Also, to > any knowledgable souls here, what RFCs address these issues? > > Thanks, > Andy Andy, I'm not sure I'm DNS guru enough to answer all your questions, but --- you don't specify what "problems" are being experienced at the location, and, are you certain it's not about this? [25] Sat 06.Sep.2008 21:58:25 [kadmin@archangel][~/logs] host 72.24.34.252 Host 252.34.24.72.in-addr.arpa. not found: 3(NXDOMAIN) *Not having* a reverse entry for a mail server is often the cause of issues. And the RFC for ESMTP is #2821. HTH, Kevin Kinsey -- In Denver it is unlawful to lend your vacuum cleaner to your next-door neighbor.help
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