Help to make a new DNS server

[Yena]

"Kevin Darcy" <kcd at daimlerchrysler.com> ha scritto nel messaggio
news:cmc2jl$r4v$1 at sf1.isc.org...
> Yena wrote:
>
> >Hi, i would like to setup a DNS Server.
> >Please, i need some help to check mi step:
> >
> >1) I have registered my domain:
> >    example.cxm
> >
> >2) I have installed Bind 9.2.1 on a RedHat 9 Server.
> >
> BIND 9.2.1 is old. You should be running something more up-to-date.
>
> >I have created my zone file in /var/named/pz:
> >-------------------------------------------------------------
> >$TTL 60
> >@               IN      SOA     ns1.example.cxm. info.example.cxm. (
> >                                2001122007;
> >                                6H;
> >                                2H;
> >                                1W;
> >                                1H );
> >                        NS      ns1.example.cxm.
> >                        NS      ns2.example.cxm.
> >                        MX      5       mail.example.cxm.
> >
> >localhost               A       127.0.0.1
> >example.cxm.        A       xxx.xxx.xxx.xxx
> >mail                      A       xxx.xxx.xxx.xxx
> >www                    A       xxx.xxx.xxx.xxx
> >ns1                      A       xxx.xxx.xxx.xxx
> >ns2                      A       xxx.xxx.xxx.yyy
> >-------------------------------------------------------------
> >
> >and i have add in named.conf:
> >zone "example.cxm" { type master; file "pz/example.cxm"; };
> >
> >3) I have add in my registrant pannel the 2 new DNS:
> >    ns1.example.cxm
> >    ns2.example.cxm
> >
> >Is it all correct?
> >
>
> A TTL of 60 seconds for data which generally doesn't change very often
> (SOA, NS, MX, the "localhost" A record) is pretty extreme. If you need
> that degree of volatility for certain A records, then limit the
> 60-second TTL to just those records, and put everything else higher (at
> least an hour). Remember that low TTLs not only overwork your
> nameserver, but every nameserver that talks to yours. So it's rather
> anti-social to set them so low without a good reason.
>
> As a matter of style, I would stick with fully-qualified owner names
> (the ones on the lefthand side) or non-fully-qualified owner names
> consistently within your zone file. Your zone file is inconsistent in
> this respect because "example.cxm." is fully-qualified, but no other
> owner name is. I'd move that record above the "localhost" line, where
> you can just use whitespace as the owner name (which means it "inherits"
> the previous non-whitespace owner name, i.e. "@", i.e. the name of the
> zone, namely "example.cxm.").
>
> Speaking of "localhost", are you sure you need that? I usually don't
> bother with it, with no ill effects. Reportedly some apps need it, but
> you could always monitor your query logs, and if nothing is querying
> that name, just rip that clutter out of your zone file...
>
> As for the "registrant pannel", I'll take your word for it that this is
> the correct way to create a delegation with your registrar. Each
> registrar is free to provide their own delegation-request mechanisms, so
> it's hard to generalize on whether a given method is right or wrong.
>
> >Have i to set or do something else?
> >Have i to set also the PTR record?
> >
> Officially, no. However, if you want to send mail be aware that many
> mail server setups these days do reverse lookups as an anti-spam
> measure, so without a PTR record for your outbound mail server(s), you
> may run into difficulties.

Thanks Kevin, now all is more clear :-)
Please, can you help me onother time ? ..
i would like to set my DNS to provide an "unlimited" CNAME
like:
* IN CNAME example.com
so i can create in my Apache httpd.conf a directive like:
NameVirtualHost *.example.com
and so add all my VHOSTs.
I have seen it in this domain: kakkiate.com.
How can i do it?
is it correct my record (* IN CNAME example.cxm )?

Thanks again

                                    -- Yena --