reverse dns

  • Thread starter Thread starter yahya
  • Start date Start date
Y

yahya

Below when i do a reverse lookup i get this below. Surely the PTR record
should show the correct domain name for it. I am totally worried about the
Answer below

Please help.

Reverse DNS for 212.19.77.12
Generated by www.DNSstuff.com
Country: UNITED KINGDOMPreparation:The reverse DNS entry for an IP is found
by reversing the IP, adding it to "in-addr.arpa", and looking up the PTR
record.So, the reverse DNS entry for 212.19.77.12 is found by looking up the
PTR record for 12.77.19.212.in-addr.arpa.All DNS requests start by asking
the root servers, and they let us know what to do next.How I am
searching:Asking h.root-servers.net for 12.77.19.212.in-addr.arpa PTR
record: h.root-servers.net says to go to tinnie.arin.net. (zone:
212.in-addr.arpa.)Asking tinnie.arin.net. for 12.77.19.212.in-addr.arpa PTR
record: tinnie.arin.net [69.25.34.195] says to go to
alycidon.firstnet.net.uk. (zone: 77.19.212.in-addr.arpa.)Asking
alycidon.firstnet.net.uk. for 12.77.19.212.in-addr.arpa PTR record: Reports
12-77-19-212-un.wireless.as15758.net. [from
212.103.224.55]Answer:212.19.77.12 PTR record:
12-77-19-212-un.wireless.as15758.net. [TTL 86400s] [A=None] *ERROR* A record
does not point back to original IP.
 
In
yahya said:
Below when i do a reverse lookup i get this below.
Surely the PTR record should show the correct domain name
for it. I am totally worried about the Answer below

Please help.

Reverse DNS for 212.19.77.12
Generated by www.DNSstuff.com
Country: UNITED KINGDOMPreparation:The reverse DNS entry
for an IP is found by reversing the IP, adding it to
"in-addr.arpa", and looking up the PTR record.So, the
reverse DNS entry for 212.19.77.12 is found by looking up
the PTR record for 12.77.19.212.in-addr.arpa.All DNS
requests start by asking the root servers, and they let
us know what to do next.How I am searching:Asking
h.root-servers.net for 12.77.19.212.in-addr.arpa PTR
record: h.root-servers.net says to go to
tinnie.arin.net. (zone: 212.in-addr.arpa.)Asking
tinnie.arin.net. for 12.77.19.212.in-addr.arpa PTR
record: tinnie.arin.net [69.25.34.195] says to go
to alycidon.firstnet.net.uk. (zone:
77.19.212.in-addr.arpa.)Asking alycidon.firstnet.net.uk.
for 12.77.19.212.in-addr.arpa PTR record: Reports
12-77-19-212-un.wireless.as15758.net. [from
212.103.224.55]Answer:212.19.77.12 PTR record:
12-77-19-212-un.wireless.as15758.net. [TTL 86400s]
[A=None] *ERROR* A record does not point back to original
IP.
Click to expand...

You may have possibly done this before the reverse lookup propagated because
this isn't the results I get at this time.

Asking ns2.nic.fr. for 12.77.19.212.in-addr.arpa PTR record:
ns2.nic.fr [192.93.0.4] says to go to ballymoss.firstnet.net.uk.
(zone: 77.19.212.in-addr.arpa.)
Asking ballymoss.firstnet.net.uk. for 12.77.19.212.in-addr.arpa PTR record:
Reports www.johim.co.uk. [from 212.103.224.56]

Answer:
212.19.77.12 PTR record: www.johim.co.uk. [TTL 86400s] [A=212.19.77.12]

Is this correct?
 
Yes this seems correct now, as the isp was contacted to correct this. But
waz just a bit concerned about the error "[A=None] *ERROR* A record does not
point back to original"

Thank you

Kevin D. Goodknecht Sr. said:
In
yahya said:
Below when i do a reverse lookup i get this below.
Surely the PTR record should show the correct domain name
for it. I am totally worried about the Answer below

Please help.

Reverse DNS for 212.19.77.12
Generated by www.DNSstuff.com
Country: UNITED KINGDOMPreparation:The reverse DNS entry
for an IP is found by reversing the IP, adding it to
"in-addr.arpa", and looking up the PTR record.So, the
reverse DNS entry for 212.19.77.12 is found by looking up
the PTR record for 12.77.19.212.in-addr.arpa.All DNS
requests start by asking the root servers, and they let
us know what to do next.How I am searching:Asking
h.root-servers.net for 12.77.19.212.in-addr.arpa PTR
record: h.root-servers.net says to go to
tinnie.arin.net. (zone: 212.in-addr.arpa.)Asking
tinnie.arin.net. for 12.77.19.212.in-addr.arpa PTR
record: tinnie.arin.net [69.25.34.195] says to go
to alycidon.firstnet.net.uk. (zone:
77.19.212.in-addr.arpa.)Asking alycidon.firstnet.net.uk.
for 12.77.19.212.in-addr.arpa PTR record: Reports
12-77-19-212-un.wireless.as15758.net. [from
212.103.224.55]Answer:212.19.77.12 PTR record:
12-77-19-212-un.wireless.as15758.net. [TTL 86400s]
[A=None] *ERROR* A record does not point back to original
IP.
Click to expand...

You may have possibly done this before the reverse lookup propagated because
this isn't the results I get at this time.

Asking ns2.nic.fr. for 12.77.19.212.in-addr.arpa PTR record:
ns2.nic.fr [192.93.0.4] says to go to ballymoss.firstnet.net.uk.
(zone: 77.19.212.in-addr.arpa.)
Asking ballymoss.firstnet.net.uk. for 12.77.19.212.in-addr.arpa PTR record:
Reports www.johim.co.uk. [from 212.103.224.56]

Answer:
212.19.77.12 PTR record: www.johim.co.uk. [TTL 86400s] [A=212.19.77.12]

Is this correct?
Click to expand...
 
In
yahya said:
Yes this seems correct now, as the isp was contacted to
correct this. But waz just a bit concerned about the
error "[A=None] *ERROR* A record does not point back to
original"
Click to expand...

This is because at the time the PTR was 12-77-19-212-un.wireless.as15758.net
for which there was no "A" record at the time.
 
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