Reverse PTR in-addr.arpa

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Wayne & Carr - 13 Apr 2004 02:55 GMT

Hello All;

I have a rather strange question that I am hoping someone can assist
me with.?

I have 13-Static IP's from my ISP, (For Commercial purposes I have the
13 IP Address's)
What I am wondering about is this:
Doing the Reverse PTR Records. How would I create it for these 13?
I know that if it was a "0" At the end, and I had the whole string.
Then it would be something like this:

10.0.0.0 10.in-addr.arpa
130.20.0.0 20.130.in-addr.arpa
250.30.203.0 203.30.250.in-addr.arpa

But I do not have the whole string.
Example of mine:

12.123.134.10 through 12.123.134.23

How would I do the Reverse PTR for this?

Thank you all;

Wayne

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Jeff Cochran - 13 Apr 2004 04:01 GMT

>Hello All;
>
[quoted text clipped - 18 lines]
>
>How would I do the Reverse PTR for this?

Normally your ISP would do this, unless they've delegated the
subnetted reverse domain to you.

Jeff

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Wayne & Carr - 13 Apr 2004 05:35 GMT

Thank You :"Jeff Cochran"

The ISP has created the Reverse PTR's for the 13-IP's
But what I usually do is when creating records for each of the Domains.
Is I check the box for: [Create Associated PTR Record]
So I will need the "23.134.123.12.in-addr.arpa"
For to send that "PTR Record" to.
And so on for each of the other domains which have there own
Static IP.
Since I have never had more than "1" single Static IP at 1 time.
I am a little lost on how to do this?
I know that if I had a whole string, I would do something like this.
134.123.23.in-addr.arpa
And that would handle all the "PTR Records" that are created (I think?)

Any information on this will be gratefully appreciated.

Remember that the list goes like so:
12.123.134.10 through 12.123.134.23

Wayne

> Normally your ISP would do this, unless they've delegated the
> subnetted reverse domain to you.
>
> Jeff

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Jeff Cochran - 13 Apr 2004 11:41 GMT

>Thank You :"Jeff Cochran"
>
> The ISP has created the Reverse PTR's for the 13-IP's
>But what I usually do is when creating records for each of the Domains.
>Is I check the box for: [Create Associated PTR Record]

You want to not check that then. It's already done for you at the ISP
level. There are issues with delegating DNS for reverse lookups on a
subnetted Class C block that ISP's tend to avoid by not delegating the
addresses.

Jeff

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Jonathan de Boyne Pollard - 13 Apr 2004 17:38 GMT

WC> I know that if it was a "0" At the end, and I had the whole
WC> string. Then it would be something like this:
WC> 10.0.0.0 10.in-addr.arpa
WC> 130.20.0.0 20.130.in-addr.arpa
WC> 250.30.203.0 203.30.250.in-addr.arpa

No, it wouldn't. Read RFC 1035 section 3.5 again.

WC> How would I do the Reverse PTR for this?

<URL:http://homepages.tesco.net./~J.deBoynePollard/FGA/avoid-rfc-2317-delegation.html>

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Wayne & Carr - 14 Apr 2004 05:19 GMT

Thanks: "Jonathan de Boyne Pollard" ;

> No, it wouldn't. Read RFC 1035 section 3.5 again.
>
> WC> How would I do the Reverse PTR for this?

<URL:http://homepages.tesco.net./~J.deBoynePollard/FGA/avoid-rfc-2317-delega
tion.html>

I have read over the pages, do not quite understand all of it, but will
do some more reading on it in a few.

Thanks
Wayne

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