[techtalk] More DNS Questions

[John Elliott]

A couple of things,

>From the Linux DNS HowTo:

"Two things must be noted about the SOA record. ns.linux.bogus must be a 
actual machine with a A record. It is not legal to have a CNAME record for he 
machine mentioned in the SOA record. "


Also:

CNAMES are used for aliases not with dotted IP's.

There is no problem with having multiple A records. It is often done to avoid 
potential problems of the misue of CNAME records.

You may find this resource useful:

Common DNS Operational and Configuration Errors
http://www.dns.net/dnsrd/rfc/rfc1912.html#2.4 CNAME


Hope this helps.

John 
On Wednesday 24 January 2001 11:25, Kath wrote:

> > Talked to another person at OPN who said the As should be unique IPs and
> CNAMEs should be thingies that resolve to the same IP.
>
> So, I fixed that.  This is how my zone file for kathweb.net looks now:
>
> @      SOA     kathweb.net. root.kathweb.net. (       24.190.202.53
>
>                         200101241       ; serial, todays date + todays
> serial # 8H              ; refresh, seconds
>                         2H              ; retry, seconds
>                         1W              ; expire, seconds
>                         1D )            ; minimum, seconds
>                 NS      kathweb.net.
>                 NS      ns2.kathweb.net
>                 MX      10 kathweb.net.  ; Primary Mail Exchanger
>                 TXT     "Kathweb"
>
> localhost       A       127.0.0.1
>
>
> kathweb.net.    CNAME   24.190.202.53
> ns1             CNAME   24.190.202.53
> ns2             A       207.127.75.180
> www             CNAME   24.190.202.53
> irc             CNAME   24.190.202.53
>
> mail            CNAME   24.190.202.53
>
> - Kath
>   ----- Original Message -----
>   From: Kath
>   To: techtalk at linuxchix.org
>   Sent: Wednesday, January 24, 2001 10:53 AM
>   Subject: Re: [techtalk] More DNS Questions
>
>
>   Ok, someone on OPN answered that for me.
>
>   Next question!
>
>   @      SOA     kathweb.net. root.kathweb.net. (       24.190.202.53
>
>                           2000012101       ; serial, todays date + todays
> serial # 8H              ; refresh, seconds
>                           2H              ; retry, seconds
>                           1W              ; expire, seconds
>                           1D )            ; minimum, seconds
>                   NS      kathweb.net.
>                   NS      ns3.srv.hcvlny.cv.net
>                   MX      10 kathweb.net.  ; Primary Mail Exchanger
>                   TXT     "Kathweb"
>
>   localhost       A       127.0.0.1
>
>
>   kathweb.net.    A       24.190.202.53
>   ns1              A       24.190.202.53
>   ns2             A       207.127.75.180
>   www             A       24.190.202.53
>   irc             A       24.190.202.53
>
>   mail            A       24.190.202.53
>
>   Does that look right?
>
>   One thing I am confused about is NS:
>                   NS      kathweb.net.
>                   NS      ns3.srv.hcvlny.cv.net
>
>   Should those be MY dns servers (ns1.kathweb.net and ns2.kathweb.net)? 
> Someone elses?  My ISP's?
>
>   - Kath, who hates DNS more and more everyday
>     ----- Original Message -----
>     From: Kath
>     To: techtalk at linuxchix.org
>     Sent: Wednesday, January 24, 2001 10:43 AM
>     Subject: [techtalk] More DNS Questions
>
>
>     Can ns1.kathweb.net be on the same IP as kathweb.net ?
>
>     - Kath

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