Comme vous pouvez le voir dans cet exemple de TLDP vous pouvez avoir plusieurs PTR
dans la même zone.
$TTL 3D
@ IN SOA yourdomain.com. root.yourdomain.com. (
199609206 ; Serial
28800 ; Refresh
7200 ; Retry
604800 ; Expire
86400) ; Minimum TTL
NS ns1.yourdomain.com.
NS ns2.yourdomain.net.
;
; Servers
;
1 PTR router.yourdomain.com.
2 PTR server.yourdomain.com.
;
; Customers
;
69 PTR mail.customerD.com.
103 PTR mail.customerA.com.
169 PTR mail.customerC.com.
199 PTR mail.customerB.com.
Il est conseillé de placer toutes les adresses IP que vous attribuez dans votre fichier d'inversion afin d'éviter les doublons.
exemple de travail
Cela me semble être une bonne chose :
$ dig -x 103.249.240.224
; <<>> DiG 9.9.5-3ubuntu0.4-Ubuntu <<>> -x 103.249.240.224
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 8551
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; QUESTION SECTION:
;224.240.249.103.in-addr.arpa. IN PTR
;; ANSWER SECTION:
224.240.249.103.in-addr.arpa. 1685 IN PTR mk.localhost-server.com.
;; ADDITIONAL SECTION:
mk.localhost-server.com. 21526 IN A 103.249.240.224
;; Query time: 2 msec
;; SERVER: 127.0.1.1#53(127.0.1.1)
;; WHEN: Wed Aug 19 09:53:51 PDT 2015
;; MSG SIZE rcvd: 99
$ dig mk.localhost-server.com
; <<>> DiG 9.9.5-3ubuntu0.4-Ubuntu <<>> mk.localhost-server.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 61167
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;mk.localhost-server.com. IN A
;; ANSWER SECTION:
mk.localhost-server.com. 21520 IN A 103.249.240.224
;; Query time: 1 msec
;; SERVER: 127.0.1.1#53(127.0.1.1)
;; WHEN: Wed Aug 19 09:53:56 PDT 2015
;; MSG SIZE rcvd: 57
chicks@silver 09:53:56 ~ !515 $
et maintenant il est cassé
confirmer la rupture :
$ dig -x 103.249.240.224
; <<>> DiG 9.9.5-3ubuntu0.3-Ubuntu <<>> -x 103.249.240.224
;; global options: +cmd
;; connection timed out; no servers could be reached
de http://mxtoolbox.com/SuperTool.aspx?action=ptr%3a103.249.240.224&run=toolpage :
PWS3v2 11784ms
0 c.in-addr-servers.arpa 196.216.169.10 NON-AUTH 296 ms Received 6 Referrals , rcode=NO_ERROR 103.in-addr.arpa. 86400 IN NS ns1.apnic.net,103.in-addr.arpa. 86400 IN NS ns2.lacnic.net,103.in-addr.arpa. 86400 IN NS ns3.apnic.net,103.in-addr.arpa. 86400 IN NS ns4.apnic.net,103.in-addr.arpa. 86400 IN NS sec1.authdns.ripe.net,103.in-addr.arpa. 86400 IN NS tinnie.arin.net,
1 ns4.apnic.net 202.12.31.140 NON-AUTH 187 ms Received 4 Referrals , rcode=NO_ERROR 240.249.103.in-addr.arpa. 86400 IN NS ns2.gazonindia.com,240.249.103.in-addr.arpa. 86400 IN NS ns4.gazonindia.com,240.249.103.in-addr.arpa. 86400 IN NS ns3.gazonindia.com,240.249.103.in-addr.arpa. 86400 IN NS ns1.gazonindia.com,
2 ns4.gazonindia.com 103.249.240.10 NON-AUTH 187 ms Timeout after 3 sec, rcode=NO_ERROR
2 ns1.gazonindia.com 103.249.240.8 NON-AUTH 187 ms Timeout after 3 sec, rcode=NO_ERROR
2 ns3.gazonindia.com 103.249.240.9 NON-AUTH 187 ms Timeout after 3 sec, rcode=NO_ERROR
2 ns2.gazonindia.com NON-AUTH 187 ms Timeout resolving IP, rcode=NO_ERROR
Il semble que les serveurs de Gazon ne répondent pas. Voyons donc qui contacter par l'intermédiaire de whois
:
$ whois 103.249.240.224
% [whois.apnic.net]
% Whois data copyright terms http://www.apnic.net/db/dbcopyright.html
% Information related to '103.249.240.0 - 103.249.243.255'
inetnum: 103.249.240.0 - 103.249.243.255
netname: GAZON
descr: Gazon Communications India Limited
admin-c: KD220-AP
tech-c: SA683-AP
country: IN
mnt-by: MAINT-IN-IRINN
mnt-irt: IRT-IRINN-IN
status: ASSIGNED portable
changed: hm-changed@apnic.net 20130613
mnt-routes: MAINT-IN-GAZON
source: APNIC
irt: IRT-IRINN-IN
address: Flat no. 6B, Uppals M6 Plaza, 6 Jasola District Centre, New Delhi-110025
e-mail: helpdesk@irinn.in
abuse-mailbox: abuse@irinn.in
admin-c: IH175-AP
tech-c: IH174-AP
auth: # Filtered
mnt-by: MAINT-IN-IRINN
changed: hostmaster@irinn.in 20120907
source: APNIC
role: System Admin
address: Parason House, 28, Venkatesh Nagar, Aurangabad, Maharashtra
country: IN
phone: +91-9762055555
fax-no: +91-2402332944
e-mail: kishor@parasonglobal.com
admin-c: KD220-AP
tech-c: KD220-AP
nic-hdl: SA683-AP
remarks: send spam and abuse report to abuse@parasonglobal.com
notify: kishor@parasonglobal.com
abuse-mailbox: abuse@parasonglobal.com
mnt-by: MAINT-IN-PARASON
changed: abuse@parasonglobal.com 20140801
source: APNIC
person: Kishor Desarda
address: Parason House, 28, Venkatesh Nagar, Aurangabad, Maharashtra
country: IN
phone: +91-9762055555
fax-no: +91-2402332944
e-mail: kishor@parasonglobal.com
nic-hdl: KD220-AP
remarks: send spam and abuse report to abuse@parasonglobal.com
notify: kishor@parasonglobal.com
abuse-mailbox: abuse@parasonglobal.com
mnt-by: MAINT-IN-PARASON
changed: kishor@parasonglobal.com 20140801
source: APNIC
% Information related to '103.249.240.0/24AS132770'
route: 103.249.240.0/24
descr: Gazon Communications India Limited
origin: AS132770
country: IN
mnt-lower: MAINT-IN-IRINN
mnt-routes: MAINT-IN-IRINN
mnt-by: MAINT-IN-IRINN
changed: netadmin@gazonindia.com 20130708
source: APNIC
% Information related to '103.249.240.0 - 103.249.243.255'
inetnum: 103.249.240.0 - 103.249.243.255
netname: GAZON
descr: Gazon Communications India Limited
admin-c: KD1-IN
tech-c: MN8-IN
country: IN
mnt-by: MAINT-IN-GAZON
mnt-irt: IRT-GAZON-IN
status: ASSIGNED portable
changed: kishor@gazonindia.com
source: APNIC
irt: IRT-GAZON-IN
address: Pune
phone: +91 02065101230
fax-no: +91 2402332944
e-mail: netadmin@gazonindia.com
abuse-mailbox: abuse@gazonindia.com
admin-c: KD1-IN
tech-c: MN8-IN
auth: CRYPT-PW yx9RQZOlthZT6
remarks: send spam and abuse report to abuse@gazonindia.com
mnt-by: MAINT-IN-GAZON
changed: netadmin@gazonindia.com 20130613
source: IRINN
role: Manager NOC
address: Pune
country: IN
phone: +91 02065101230
fax-no: +91 2402332944
e-mail: netadmin@gazonindia.com
admin-c: KD1-IN
tech-c: KD1-IN
nic-hdl: MN8-IN
remarks: send spam and abuse report to abuse@gazonindia.com
notify: abuse@gazonindia.com
abuse-mailbox: abuse@gazonindia.com
mnt-by: MAINT-IN-GAZON
changed: netadmin@gazonindia.com 20130613
source: IRINN
person: Kishor Desarda
address: Parason House, 28, Venkatesh Nagar, Jalna Road
country: IN
phone: +91 02065101230
fax-no: +91 2402332944
e-mail: kishor@gazonindia.com
nic-hdl: KD1-IN
remarks: send spam and abuse report to abuse@gazonindia.com
notify: abuse@gazonindia.com
abuse-mailbox: abuse@gazonindia.com
mnt-by: MAINT-IN-GAZON
changed: kishor@gazonindia.com 20130613
source: IRINN
% Information related to '103.249.240.0/24AS132770'
route: 103.249.240.0/24
descr: Gazon Communications India Limited
country: IN
origin: AS132770
remarks: abuse@gazonindia.com
notify: netadmin@gazonindia.com
mnt-lower: MAINT-IN-GAZON
mnt-routes: MAINT-IN-GAZON
mnt-by: MAINT-IN-GAZON
changed: netadmin@gazonindia.com 20130625
source: IRINN
% This query was served by the APNIC Whois Service version 1.69.1-APNICv1r0 (UNDEFINED)