Re: DNS recs, a beginners question

On Thu, Sep 16, 2004 at 08:23:53AM +0200,
Arun Dev <nospam@pleaz.xy> wrote
a message of 51 lines which said:

> I know this is a really newbie question.

Moreover, this is a question that could be solved by setting up a
dummy name server at home and testing with BIND. Any second-hand PC
with a free Unix is more than enough for learning DNS by practice.

Moreover, you gave no indication on the name servers. I assume they
were:

ns1.schoolx.yz with the IP address X.Y.Z.T (the primary)
ns1.isp.net with the IP address O.P.Q.R (a secondary)

Zone file of schoolx.yz :

$TTL 86400
@ IN SOA ns1.schoolx.yz. hostmaster.schoolx.yz. (
2004091701 ;serial
21600 ;refresh
3600 ;retry
3600000 ;expire
86400 ); minimum
IN TXT "Domain configured without any warranty"
IN NS ns1
IN NS ns1.isp.net.
IN TXT "v=spf1 a:mail.schoolx.yz -all"
IN MX 10 iron

ns1 IN A X.Y.Z.T
iron IN A A.B.C.D
www IN CNAME iron
mail IN CNAME iron

Zone file of c.b.a.in-addr.arpa (you have the delegation of the /24?) :

$TTL 86400
@ IN SOA ns1.schoolx.yz. hostmaster.schoolx.yz. (
2004091701 ;serial
21600 ;refresh
3600 ;retry
3600000 ;expire
86400 ); minimum
IN TXT "Domain configured without any warranty"

d IN PTR iron.schoolx.yz.

> - the outgoing mail should carry from addresses in the form
> user@schoolx.yz

This is a mail issue , off-topic for this list. What is the mail
server software?

> - our provider's mail server should store incoming mail in case
> the machine or the SMTP daemon is down

Bad idea, IMHO, so I did not implement it. (Unless you have a very
good working relationship with the ISP.)