Re: Simple DNS For Private LAN

On 6/23/2006 8:54 AM Giorgos Keramidas wrote:
On 2006-06-23 08:21, Drew Tomlinson <drew@xxxxxxxxxxxxxxxxxx> wrote:
I'm having a hard time understanding what I need to do. I have
a small home network that uses a 3Com DSL modem/router as the
last hop to the Internet. Currently, the DSL modem/router to
provides DNS for both my home network and the Internet.
Basically I have a few static entries for machines on my home
network and then the DSL modem/router queries my ISPs name
servers for everything else.

When I registered my domain, I used ZoneEdit as my name
servers. 'whois mykitchentable.net' gives this output:

domain: mykitchentable.net
owner-name: Drew Tomlinson
nserver: ns3.zoneedit.com 209.61.140.1
nserver: ns4.zoneedit.com 216.98.150.236

Are machines from your `internal' network visible outside? If
not, you can set up a locally-visible fake domain, i.e. `*.drew',
and run a local caching name server. This name server can be a
master for the ``drew.'' zone (``zones'' is what BIND calls parts
of the Domain Name System) and, at the same time, a slave for the
``mykitchentable.net'' zone.

Now I'm changing ISPs and the DSL modem/router will be removed.
I am going to use a FBSD 6.x box to be my router, firewall, and
DNS server. I read the handbook regarding DNS but remain
confused.

The Handbook needs a bit of work around that area :-/

Should I be a master for mykitchentable.net?

Not necessarily. You can leave the name-servers of zoneedit as
masters.

I'm thinking not because ZoneEdit is the master, correct?

Correct :-)

So should I be a slave?

This would be nice.

And if I'm a slave, will my DNS get it's updates from ZoneEdit?

This depends on whether ZoneEdit allows ``zone transfers'' from
their master name servers to the one you will set up as a slave.

Or should I become master for my zone and make ZoneEdit a
backup DNS?

I'd probably leave ZoneEdit as the master, unless your DSL has a
static IP address. Even if you *do* have a static IP address,
then it is still a good idea to leave ZoneEdit as the master, as
long as they let you become a slave NS.

I'm a complete newbie to DNS but know that it's important to
get it right or lots of stuff gets broken. Can someone please
guide me in the right direction? I don't mind reading if you
send me a link. :)

I think the next step should be to check if ZoneEdit allows you
to become a slave NS for your zones.

Then you need to decide if the systems you have behind the
FreeBSD gateway will have publicly-visible addresses or use NAT.

If you use NAT, then I can guide you through setting up a local
``master zone'' that is only visible inside your home network,
and a ``slave zone'' that pulls stuff from ZoneEdit for the
``mykitchentable.net'' domain. I already have a similar setup at
home, to let my internal systems (workstation, laptop) see each
other with internal names and still use my ISP's name servers for
everything else.

If you don't use NAT, things are going to be much easier, since
you only have to set up the names at ZoneEdit and pull the master
zone from there.
Thank you for your reply. I use NAT for my servers that are visible from the outside so I set ZoneEdit to return the same address for all servers at mykitchentable.net which is currently 67.137.238.101. Thus www.mykitchentable.net, drew.mykitchentable.net, mykitchentable.net, and whatever else.all return 67.137.238.101. Based up this, it seems that I should leave ZoneEdit alone and set up a local "master zone" visible only to my private LAN as you describe above. Being a slave and pulling from ZoneEdit wouldn't have any benefit as the public address won't equal the private address.

So assuming I understand correctly, yes, please guide me in setting up a local master zone.

Thank you very much!!!

Drew

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