nanog-request@nanog.org wrote:

hi,

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.

thanks, b

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 ip4.1-2-3.static.ourdomain.net