Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.debian.user > #256348

Re: Question for this IP's PTR

Show all headers | View raw

On 2023-03-25 08:32, Greg Wooledge wrote:
> On Sat, Mar 25, 2023 at 08:28:03AM +0800, fh@dnsbed.com wrote:
>> Greetings,
>> 
>> as you see this PTR,
>> 
>> $ dig -x 1.1.1.1 +short
>> one.one.one.one.
>> 
>> so 2.2.2.2 can have the PTR two.two.two.two? and 3.3.3.3 can have
>> three.three.three.three?
> 
> Any IP address can have any PTR value.  You just have to petition the
> owner of the IP address range to set it.
> 
> I didn't know .one was a valid TLD.  It looks like .two is not, so if
> someone were to assign "two.two.two.two" as the PTR value of an IP
> address, that PTR would not resolve back to any IP address.  (An IP
> address block owner might reject such a petition.)


Thanks Greg.
I also don't know .one is a valid TLD, looks surprising.

But, one.one is owned by a domain registrar (one.com), while 
one.one.one's zone owner is cloudflare.

$ dig one.one soa +short
a.b-one-dns.net. hostmaster.one.com. 2013010101 1800 900 1209600 300

$ dig one.one.one soa +short
fred.ns.cloudflare.com. dns.cloudflare.com. 2305085481 10000 2400 604800 
3600

maybe they co-work for this domain.


regards.

Back to linux.debian.user | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Question for this IP's PTR fh@dnsbed.com - 2023-03-25 01:30 +0100
  Re: Question for this IP's PTR Greg Wooledge <greg@wooledge.org> - 2023-03-25 01:40 +0100
    Re: Question for this IP's PTR fh@dnsbed.com - 2023-03-25 02:30 +0100
    Re: Question for this IP's PTR Jeremy Ardley <jeremy@ardley.org> - 2023-03-25 02:30 +0100
    Re: Question for this IP's PTR Joe <joe@jretrading.com> - 2023-03-25 10:30 +0100
  Re: Question for this IP's PTR debian-user@howorth.org.uk - 2023-03-25 19:20 +0100

csiph-web