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Update PTR Record example 

* 192.0.2.12 --> example.org.
* example.org. --> 192.0.2.12
* RPC 12.2.0.192.in-addr.arpa.

Change-Id: I609983a5f66614aeba36da63ac9a8446c70b4e18
This commit is contained in:
caowei 2017-11-14 10:42:59 +08:00
parent f1464225fb
commit 821620167b
1 changed files with 4 additions and 4 deletions
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8
doc/source/user/manage-ptr-records.rst
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@ -27,7 +27,7 @@ addresses to a domain. For example,
.. code-block:: bash
$ dig -x 192.0.2.5 +short
$ dig -x 192.0.2.12 +short
example.org.
The way this works in the DNS system is through the `in-addr.arpa.`
@ -47,10 +47,10 @@ zone. For example
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4000
;; QUESTION SECTION:
;12.55.168.192.in-addr.arpa. IN PTR example.org.
;12.2.0.192.in-addr.arpa. IN PTR example.org.
;; AUTHORITY SECTION:
12.55.168.192.in-addr.arpa. 3600 IN NS ns1.example.org.
12.2.0.192.in-addr.arpa. 3600 IN NS ns1.example.org.
;; Query time: 40 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
@ -58,7 +58,7 @@ zone. For example
;; MSG SIZE rcvd: 119
In the question section we see the address being requested from the
DNS system as `12.55.168.192.in-addr.arpa.`. As you can see, the IP
DNS system as `12.2.0.192.in-addr.arpa.`. As you can see, the IP
address has been reversed in order to function similarly to a domain
name where the more specific elements come first. The reversed IP
address is then added to the `in-addr.arpa.` domain, at which point