Re: Off Topic: DNS Delegation Help [7:28910]

[[EMAIL PROTECTED] (John Nemeth)]

On May 4,  7:20am, "Shawn Xu" wrote:
}
} We are ISP to assign different ip blocks to our customers. After
subnetting
} , one of our clients asks me to do "Reverse DNS Delegation" for his DNS.
He
} owns his DNS and domain name which is not our subdomain.

 You're right.  This is grossly off-topic.  Also, the very fact
that you are asking this question (combined with the stuff that I
snipped) means that you really need to hire somebody that knows what
they are doing.  I charge people a lot of money for solving these kinds
of problems (not to mention the fact that it is off-topic), so all I'm
going to say is, see RFC 2317.

}-- End of excerpt from "Shawn Xu"




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Re: Off Topic: DNS Delegation Help [7:28910]

[Andrew Cook]

You need to give the customer control of the reverse-lookups which associate
IPs with hostnames, rather than the other way around.  If you are trying to
do this on a non-classful boundary, see:
http://www.menandmice.com/ONLINE%20DOCS%20AND%20FAQ/Glossary/Classless.Deleg
ation.htm
If you choose not to delegate non-classful reverses, you will have to make
the entries in your own server - much wiser to delegate, I think.

This has worked very well for us.  I would also strongly recommend the
O'Reilly "DNS and BIND" book by Cricket Liu - if you are an ISP, you need to
know DNS cold.  Of course, if you are using MS for DNS, all bets are off!

Reverse DNS is an important tool for discovering the identity of a host -
often used to check interesting log entries.  Also, for certain
export-controlled software, sites will compare forward and reverse DNS
entries before allowing the download to proceed.

Regards,

Andrew

""Shawn Xu""  wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> We are ISP to assign different ip blocks to our customers. After
subnetting
> , one of our clients asks me to do "Reverse DNS Delegation" for his DNS.
He
> owns his DNS and domain name which is not our subdomain.
>
> I think, in order to do DNS reverse delegation, the delegated domain must
be
> a subdomain of our domain. For example, our domain is company.com, and
their
> domain must be something like sales.company.com, but he is not our
> subdomain. Please help to clear the concept.
>
> Anyway, what I did is based on the attached, but it is still not working.
>
> Please help. Thank you very much in advance.
>
> Shawn Xu
>
>
>
>
> _
> Send and receive Hotmail on your mobile device: http://mobile.msn.com
>
> [GroupStudy.com removed an attachment of type text/richtext which had a
name
> of RevDnsGele.rtf]




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Off Topic: DNS Delegation Help [7:28910]

[Shawn Xu]

We are ISP to assign different ip blocks to our customers. After subnetting 
, one of our clients asks me to do "Reverse DNS Delegation" for his DNS. He 
owns his DNS and domain name which is not our subdomain.

I think, in order to do DNS reverse delegation, the delegated domain must be 
a subdomain of our domain. For example, our domain is company.com, and their 
domain must be something like sales.company.com, but he is not our  
subdomain. Please help to clear the concept.

Anyway, what I did is based on the attached, but it is still not working.

Please help. Thank you very much in advance.

Shawn Xu




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