mail server DNS configuration questions

Andrew Falanga af300wsm at
Sun Sep 7 01:29:56 UTC 2008


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       "lot's of networks"
Private Network <--> CableOne <--> Internet

Now, our mail server's IP is  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)
-> dig +short -t MX
-> dig +short -t A
-> dig +short -x

(from the church FBSD machine)
-> hostname
-> ifconfig fxp0
        inet netmask 0xffffff00 broadcast
        ether 00:d0:b7:74:87:48
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active
-> cat /etc/resolv.conf
search McCutchanLAN

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 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: 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?


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