Dig -x +trace?

[Crist Clark]

Also should point out that when you do a +trace, your /etc/resolv.conf is
irrelevant since dig is going to try to figure things out from the root on
its own.

The fact you were careful to talk about your resolv.conf signals that you
may not be troubleshooting whatever you think you are.

What is the real problem here?

On Thu, Sep 29, 2022 at 3:57 PM Mark Andrews <marka at isc.org> wrote:

>
>
> > On 30 Sep 2022, at 07:50, Mike Hodson <mystica at gmail.com> wrote:
> >
> > I'm attempting to figure out how/why my reverse DNS delegation is broken.
> > I've already deleted systemd-resolved's temporary resolv.conf and added
> in an immutable single line
> > nameserver 1.1.1.1
> > resolv.conf.
> >
> > I can dig +trace forward hostnames fine.
> > I cannot dig -x an ip +trace.
> > All I get is the root-servers instead of any sort of reverse looking up
> happening at all.
> > What am I doing wrong?
>
> Hiding the actual address you are wanting the reverse lookups for.  Really
> you have an incredible resource here of knowledgeable people with millennia
> of experience between them who would have looked at every delegation and
> then would have told you what they saw that was wrong.
>
> Not installing maintenance releases when they are released.  dig +trace is
> a little fragile in 9.18.1 following the change to libuv.  Upgrade to a
> current release.
>
> > Thanks,
> >
> > Mike
> >
> > $ dig -x 208.x.x.x +trace
> >
> > ; <<>> DiG 9.18.1-1ubuntu1.1-Ubuntu <<>> -x 208.x.x.x +trace
> > ;; global options: +cmd
> > .                       509855  IN      NS      a.root-servers.net.
> > .                       509855  IN      NS      b.root-servers.net.
> > .                       509855  IN      NS      c.root-servers.net.
> > .                       509855  IN      NS      d.root-servers.net.
> > .                       509855  IN      NS      e.root-servers.net.
> > .                       509855  IN      NS      f.root-servers.net.
> > .                       509855  IN      NS      g.root-servers.net.
> > .                       509855  IN      NS      h.root-servers.net.
> > .                       509855  IN      NS      i.root-servers.net.
> > .                       509855  IN      NS      j.root-servers.net.
> > .                       509855  IN      NS      k.root-servers.net.
> > .                       509855  IN      NS      l.root-servers.net.
> > .                       509855  IN      NS      m.root-servers.net.
> > .                       509855  IN      RRSIG   NS 8 0 518400
> 20221012170000 20220929160000 20826 .
> FkcsBmNz2oK02ARhYfNSfxbnEL93RITDteQtHQoPn8zHZg9B6BRXqkH9
> +UpAEViDraX+4l8YJiUvYzrHh9twpQry0vv7xgDLoDdU9kRqokG5DEoq
> Ueqph6qleC6Vylga4f1MzW
> > N+Dh9zK9/eCSp6WxwgbnW53a9GMDbI5KWZ
> WkcWw3IPHVvVwDZfWhrKJtKZ3hafsGgmigm9F01Xk17prOAS6jBbvYjT
> jCUyTl3UZJ+bAKS4tkpFdjp78raxBKBQPN6TzdLjtxYQrhriZZ3Gjdcg
> dT+WQkLGYuyeakm2JqVe9vXGMGn0XkZEGMYnh7iW80N1XHyBMfhzGO+s 61zvWA==
> > ;; Received 1097 bytes from 1.1.1.1#53(1.1.1.1) in 12 ms
> >
> >
> > --
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> --
> Mark Andrews, ISC
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> PHONE: +61 2 9871 4742              INTERNET: marka at isc.org
>
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