Jeremy C. Reed
jreed at isc.org
Wed Jun 3 19:02:50 UTC 2009
On Wed, 3 Jun 2009, Scott Haneda wrote:
> Hoping I can get a walk through in simple terms, but also a pointer to
> some docs where I can dive into the details. I think I am finding what
> I want in the docs, but those docs come up 404 since the isc site
> changed things a bit, from there, I generally can not locate the old doc
What documents? I will help make sure they are visible or fix links if
> 1) Is it possible to determine what ip range/space has been given to
> user of that IP space? For example, in a colocation environment, I am
> given say, a /24, and I want to look that up and see if it really is a
> /24. I have found the -x option which is making life a lot easier to
> find PTR records.
Someone else can answer that.
> 2) Given an IP that does not have a PTR, how do I determine if it has
> been "sub delegated" (?) to the user of that IP? I need to learn
> whether or not I need to contact the IP provider, and ask for a PTR
> record, or if I need to add one in myself.
Use dig to follow the delegation. For example:
dig -x 220.127.116.11 @f.root-servers.net
dig -x 18.104.22.168 @chia.arin.net
(look at authority section)
dig -x 22.214.171.124 @ams.sns-pb.isc.org.
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