Re: IP address allocation

["Hendra Santosa" <hendra () srd co id>]

I agree with some people there to say that a person don't have to put DNS
records of all IP he/she has. The IPs has already been signed but don't have
to be resolved. Some might have an interest to protect the information of an
IP he/she has. I saw a network which route the IP inside their internal
network a bit dynamicly. And for a special purpose, it's open only for a
certain time.

cyhss

----- Original Message -----
From: "Terry" <tech () futurecourse com>
To: <security-basics () securityfocus com>
Sent: Thursday, July 31, 2003 4:41 PM
Subject: IP address allocation


> Hi,
>
> I've googled but haven't really come across anything that answers my
> questions.  Is it common practice for ISPs to allocate a block of
> addresses to a customer and put in DNS records for ones that are
> unused?
>
> For example, xxx.8-xxx.15 is assigned to the customer.  Customer uses
> xxx.9 for the router and xxx.10 for web server.  xxx.11-14 are unused.
> I would expect to see DNS records for xxx.9 and xxx.10 but not for the
> rest of the block.  Am I wrong?  If there are DNS records for the rest
> of the IPs, why is that?  Is there some security reason for doing
> this?
>
> --
> Regards,
> Terry
>
>
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>

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