i have a question ?

johnzeng johnzeng2013 at yahoo.com
Thu Apr 14 11:55:09 UTC 2016



Hello Dear Sir :

i have a question , i build a dns server ( forward mode ) , i hope dns
server will cover forward and cache only .

but i found a strange string. when i reslove y0.ifengimg.com via
nslookup command between a client and a dns server .

i found there are different result . i hope the result will be same
between a client and a dns server .


if possible , please give me some adivisement


John

----------------------------------------------------------

this is my config

----------------------------------------------------------

controls {
inet 127.0.0.1 port 953
allow { 127.0.0.1; } keys { "rndc-key"; };
};

max-ncache-ttl 30;
max-cache-ttl 60;

tcp-clients 10240;

forward only;
forwarders{ 202.96.134.133; 202.96.134.133; 202.96.134.133; };

};

allow-query { any; };

allow-query-cache { any; };
zone "." IN {

type hint;

file "named.root";

};

zone "localhost" IN {

type master;

file "localhost.zone";

allow-update { none; };

};

zone "0.0.127.in-addr.arpa" IN {

type master;

file "named.local";

allow-update { none; };

};


-------------------------------------------------------

this is a client and nslookup result
-------------------------------------------------------


root at laptop:/accerater/config/dns# nslookup y0.ifengimg.com
Server: 202.96.134.133
Address: 202.96.134.133#53

Non-authoritative answer:
y0.ifengimg.com canonical name = y0.ifengimg.chinacache.net.
y0.ifengimg.chinacache.net canonical name = cc00066.h.telssr.chinacache.net.
cc00066.h.telssr.chinacache.net canonical name =
hpcc-page.telssr.chinacache.net.
Name: hpcc-page.telssr.chinacache.net
Address: 183.2.202.48
Name: hpcc-page.telssr.chinacache.net
Address: 14.215.89.9



-------------------------------------------------------

this is a dns server and nslookup result
-------------------------------------------------------

root at app:/appgame/sbin# nslookup y0.ifengimg.com
Server: 127.0.0.1
Address: 127.0.0.1#53

Non-authoritative answer:
y0.ifengimg.com canonical name = y0.ifengimg.chinacache.net.
y0.ifengimg.chinacache.net canonical name = cc00066.h.telssr.chinacache.net.
cc00066.h.telssr.chinacache.net canonical name =
hpcc-page.telssr.chinacache.net.
Name: hpcc-page.telssr.chinacache.net
Address: 14.215.89.11
Name: hpcc-page.telssr.chinacache.net
Address: 14.215.89.9



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