checking subnet delegation?
online-reg at enigmedia.com
Tue Jan 4 16:33:12 UTC 2011
> > Hi All: I have a /28 that was supposed to be delegated to my NS by my
> > ISP.
> > How can I check that it is correctly delegated? I have the in-addr.arpa
> > zone
> > configured in my NS and it resolves properly when I test it locally, but
> > if
> > I test using a remote service no reverse is found.
> > The subnet is 184.108.40.206/28
> > it should be delegated to ns.enigmedia.com and ns1.enigmedia.com
> It is:
> > My zone file is 128-220.127.116.11.in-addr.arpa
> > Not sure if the problem is on my end or if it's not delegated properly?
> zarathustra:~ skull$ fast-rdns.pl 18.104.22.168/28
> # Stepping through 22.214.171.124/28 every 1 IPs
> 126.96.36.199 128.128-188.8.131.52.in-addr.arpa.
> 184.108.40.206 129.128-220.127.116.11.in-addr.arpa.
> 18.104.22.168 130.128-22.214.171.124.in-addr.arpa.
> 126.96.36.199 mail.searchpartner.pro.
> 188.8.131.52 131.128-184.108.40.206.in-addr.arpa.
> 220.127.116.11 ns1.enigmedia.com.
> # Took 3 seconds to scan 18.104.22.168/28 with stepsize 1
Great, so it looks like it's set up correctly. I was testing it with a few
public reverse-dns lookup tools yesterday, (e.g
http://postmaster.aol.com/cgi-bin/plugh/rdns.pl) and no PTRs were being
At the same time, DIG returned the correct info when I queried my NS
directly...I have the feeling my upstream's NS was at fault, because
everything's working now :(
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