NANOG Digest, Vol 14, Issue 44
mike at steadfast.net
Sat Mar 21 07:16:33 CDT 2009
nanog-request at nanog.org wrote:
> I want to ask some folks out there that maintain reverse DNS queries
> of their respective IP blocks. I want to know if there is a need for
> me to contact my upstream provider. I am in charge of 2 /24's under
> LACNIC. I've already registered my DNS servers on LACNIC. but for some
> weird reason it's not owning reverse resolves. any tips would be
> gladly appreciated.
You can use the dig utility that usually comes with bind to trace the NS
records for the ip block down, just run:
# dig 255.254.253.252.in-addr.arpa @a.root-servers.net NS +trace
That will tell you what nameserver is directing you where. You can also
use this web-based utility to query the root nameservers to figure out
where your queries are being directed to: http://www.squish.net/dnscheck
. Just make sure you are entering your ip in the reverse-dns,
*.in-addr.arpa format, and not the actual ip address.
> > Slighty related...
> > Can people please post their recommended reverse dns naming
> conventions for a small ISP with growth and scalability in mind.
> > I already have one drawn up, but I would like to contrast and compare :D
> > Thanks
More information about the NANOG