<div dir="ltr"><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><p dir="auto">Hello ,</p>
<p dir="auto">I have run the dns server by myself which installed centos7 and bind version is BIND 9.11.4-P2-RedHat-9.11.4-26.P2.el7_9.9 (Extended Support Version) ,the domain name is <a href="http://kaixinduole.com">kaixinduole.com</a></p>
<p dir="auto">I just create a cname record for tesing ,which is www cname to <a href="http://www.baidu.com" rel="nofollow noreferrer noopener">www.baidu.com</a>. please see the below :</p>
<div class="gmail-gl-relative gmail-markdown-code-block gmail-js-markdown-code">
<pre class="gmail-code gmail-highlight gmail-js-syntax-highlight gmail-language-plaintext gmail-white" lang="plaintext" id="gmail-code-5"><code><span id="gmail-LC1" class="gmail-line" lang="plaintext">[root@bind-master-centos7 named]# cat kaixinduole.com.zone</span>
<span id="gmail-LC2" class="gmail-line" lang="plaintext">$TTL 1D</span>
<span id="gmail-LC3" class="gmail-line" lang="plaintext">@ IN SOA <a href="http://ns1.kaixinduole.com">ns1.kaixinduole.com</a>. <a href="http://shawn.kaixinduole.com">shawn.kaixinduole.com</a>. ( </span>
<span id="gmail-LC4" class="gmail-line" lang="plaintext"> 202204276</span>
<span id="gmail-LC5" class="gmail-line" lang="plaintext"> 1H </span>
<span id="gmail-LC6" class="gmail-line" lang="plaintext"> 15M </span>
<span id="gmail-LC7" class="gmail-line" lang="plaintext"> 1W </span>
<span id="gmail-LC8" class="gmail-line" lang="plaintext"> 1D )</span>
<span id="gmail-LC9" class="gmail-line" lang="plaintext"></span>
<span id="gmail-LC10" class="gmail-line" lang="plaintext"> IN NS <a href="http://ns1.kaixinduole.com">ns1.kaixinduole.com</a>.</span>
<span id="gmail-LC11" class="gmail-line" lang="plaintext"> IN NS <a href="http://ns2.kaixinduole.com">ns2.kaixinduole.com</a>.</span>
<span id="gmail-LC12" class="gmail-line" lang="plaintext"> IN MX 10 mx1</span>
<span id="gmail-LC13" class="gmail-line" lang="plaintext"> IN MX 20 mx2</span>
<span id="gmail-LC14" class="gmail-line" lang="plaintext"> IN A 22.3.3.95</span>
<span id="gmail-LC15" class="gmail-line" lang="plaintext">ns1 IN A 52.130.145.30</span>
<span id="gmail-LC16" class="gmail-line" lang="plaintext">ns2 IN A 139.217.99.188</span>
<span id="gmail-LC17" class="gmail-line" lang="plaintext">mx1 IN A 2.1.1.7</span>
<span id="gmail-LC18" class="gmail-line" lang="plaintext">mx2 IN A 2.1.1.7</span>
<span id="gmail-LC19" class="gmail-line" lang="plaintext">mx3 IN A 2.1.1.7</span>
<span id="gmail-LC20" class="gmail-line" lang="plaintext">subversion IN A 139.219.5.165</span>
<span id="gmail-LC21" class="gmail-line" lang="plaintext">http IN A 100.2.2.8</span>
<span id="gmail-LC22" class="gmail-line" lang="plaintext">www IN CNAME <a href="http://www.baidu.com">www.baidu.com</a>.</span>
<span id="gmail-LC23" class="gmail-line" lang="plaintext">mail IN NS ns1.mail</span>
<span id="gmail-LC24" class="gmail-line" lang="plaintext">harbor IN A 40.73.22.32</span>
<span id="gmail-LC25" class="gmail-line" lang="plaintext">mail IN NS ns2.mail</span>
<span id="gmail-LC26" class="gmail-line" lang="plaintext">ns1.mail IN A 139.217.98.3</span>
<span id="gmail-LC27" class="gmail-line" lang="plaintext">ns2.mail IN A 139.217.98.3</span>
<span id="gmail-LC28" class="gmail-line" lang="plaintext">file IN NS ns1.file</span>
<span id="gmail-LC29" class="gmail-line" lang="plaintext">file IN NS ns2.file</span>
<span id="gmail-LC30" class="gmail-line" lang="plaintext">ns1.file IN A 139.217.98.3</span>
<span id="gmail-LC31" class="gmail-line" lang="plaintext">ns2.file IN A 139.217.98.3</span>
<span id="gmail-LC32" class="gmail-line" lang="plaintext">file IN A 52.131.78.18</span>
<span id="gmail-LC33" class="gmail-line" lang="plaintext">@ IN TXT "v=spf1 a ip4:184.164.141.188 ~all"</span>
<span id="gmail-LC34" class="gmail-line" lang="plaintext">@ IN TXT "YOU CAN CONTACT ME BY PHONE 15810410643"</span></code></pre>
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<p dir="auto">actually this cname record just does work properly ,the other rest of record are woring normally .</p>
<p dir="auto">my testing below:</p>
<div class="gmail-gl-relative gmail-markdown-code-block gmail-js-markdown-code">
<pre class="gmail-code gmail-highlight gmail-js-syntax-highlight gmail-language-plaintext gmail-white" lang="plaintext" id="gmail-code-6"><code><span id="gmail-LC1" class="gmail-line" lang="plaintext">[root@centos7 ~]# dig <a href="http://harbor.kaixinduole.com">harbor.kaixinduole.com</a></span>
<span id="gmail-LC2" class="gmail-line" lang="plaintext"></span>
<span id="gmail-LC3" class="gmail-line" lang="plaintext">; <<>> DiG 9.11.4-P2-RedHat-9.11.4-26.P2.el7_9.9 <<>> <a href="http://harbor.kaixinduole.com">harbor.kaixinduole.com</a></span>
<span id="gmail-LC4" class="gmail-line" lang="plaintext">;; global options: +cmd</span>
<span id="gmail-LC5" class="gmail-line" lang="plaintext">;; Got answer:</span>
<span id="gmail-LC6" class="gmail-line" lang="plaintext">;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 33479</span>
<span id="gmail-LC7" class="gmail-line" lang="plaintext">;; flags: qr rd ra ad; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1</span>
<span id="gmail-LC8" class="gmail-line" lang="plaintext"></span>
<span id="gmail-LC9" class="gmail-line" lang="plaintext">;; OPT PSEUDOSECTION:</span>
<span id="gmail-LC10" class="gmail-line" lang="plaintext">; EDNS: version: 0, flags:; udp: 512</span>
<span id="gmail-LC11" class="gmail-line" lang="plaintext">;; QUESTION SECTION:</span>
<span id="gmail-LC12" class="gmail-line" lang="plaintext">;<a href="http://harbor.kaixinduole.com">harbor.kaixinduole.com</a>. IN A</span>
<span id="gmail-LC13" class="gmail-line" lang="plaintext"></span>
<span id="gmail-LC14" class="gmail-line" lang="plaintext">;; ANSWER SECTION:</span>
<span id="gmail-LC15" class="gmail-line" lang="plaintext"><a href="http://harbor.kaixinduole.com">harbor.kaixinduole.com</a>. 21600 IN A 40.73.22.32</span>
<span id="gmail-LC16" class="gmail-line" lang="plaintext"></span>
<span id="gmail-LC17" class="gmail-line" lang="plaintext">;; Query time: 439 msec</span>
<span id="gmail-LC18" class="gmail-line" lang="plaintext">;; SERVER: 8.8.8.8#53(8.8.8.8)</span>
<span id="gmail-LC19" class="gmail-line" lang="plaintext">;; WHEN: Tue May 24 13:07:51 CST 2022</span>
<span id="gmail-LC20" class="gmail-line" lang="plaintext">;; MSG SIZE rcvd: 67</span>
<span id="gmail-LC21" class="gmail-line" lang="plaintext"></span>
<span id="gmail-LC22" class="gmail-line" lang="plaintext">[root@centos7 ~]# dig <a href="http://subversion.kaixinduole.com">subversion.kaixinduole.com</a></span>
<span id="gmail-LC23" class="gmail-line" lang="plaintext"></span>
<span id="gmail-LC24" class="gmail-line" lang="plaintext">; <<>> DiG 9.11.4-P2-RedHat-9.11.4-26.P2.el7_9.9 <<>> <a href="http://subversion.kaixinduole.com">subversion.kaixinduole.com</a></span>
<span id="gmail-LC25" class="gmail-line" lang="plaintext">;; global options: +cmd</span>
<span id="gmail-LC26" class="gmail-line" lang="plaintext">;; Got answer:</span>
<span id="gmail-LC27" class="gmail-line" lang="plaintext">;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 29175</span>
<span id="gmail-LC28" class="gmail-line" lang="plaintext">;; flags: qr rd ra ad; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1</span>
<span id="gmail-LC29" class="gmail-line" lang="plaintext"></span>
<span id="gmail-LC30" class="gmail-line" lang="plaintext">;; OPT PSEUDOSECTION:</span>
<span id="gmail-LC31" class="gmail-line" lang="plaintext">; EDNS: version: 0, flags:; udp: 512</span>
<span id="gmail-LC32" class="gmail-line" lang="plaintext">;; QUESTION SECTION:</span>
<span id="gmail-LC33" class="gmail-line" lang="plaintext">;<a href="http://subversion.kaixinduole.com">subversion.kaixinduole.com</a>. IN A</span>
<span id="gmail-LC34" class="gmail-line" lang="plaintext"></span>
<span id="gmail-LC35" class="gmail-line" lang="plaintext">;; ANSWER SECTION:</span>
<span id="gmail-LC36" class="gmail-line" lang="plaintext"><a href="http://subversion.kaixinduole.com">subversion.kaixinduole.com</a>. 21600 IN A 139.219.5.165</span>
<span id="gmail-LC37" class="gmail-line" lang="plaintext"></span>
<span id="gmail-LC38" class="gmail-line" lang="plaintext">;; Query time: 323 msec</span>
<span id="gmail-LC39" class="gmail-line" lang="plaintext">;; SERVER: 8.8.8.8#53(8.8.8.8)</span>
<span id="gmail-LC40" class="gmail-line" lang="plaintext">;; WHEN: Tue May 24 13:08:07 CST 2022</span>
<span id="gmail-LC41" class="gmail-line" lang="plaintext">;; MSG SIZE rcvd: 71</span>
<span id="gmail-LC42" class="gmail-line" lang="plaintext"></span>
<span id="gmail-LC43" class="gmail-line" lang="plaintext">[root@centos7 ~]# dig <a href="http://www.kaixinduole.com">www.kaixinduole.com</a> # it should be cname to <a href="http://www.baidu.com">www.baidu.com</a> .but it actully respond with 1.1.1.1</span>
<span id="gmail-LC44" class="gmail-line" lang="plaintext"></span>
<span id="gmail-LC45" class="gmail-line" lang="plaintext">; <<>> DiG 9.11.4-P2-RedHat-9.11.4-26.P2.el7_9.9 <<>> <a href="http://www.kaixinduole.com">www.kaixinduole.com</a></span>
<span id="gmail-LC46" class="gmail-line" lang="plaintext">;; global options: +cmd</span>
<span id="gmail-LC47" class="gmail-line" lang="plaintext">;; Got answer:</span>
<span id="gmail-LC48" class="gmail-line" lang="plaintext">;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 46971</span>
<span id="gmail-LC49" class="gmail-line" lang="plaintext">;; flags: qr rd ra ad; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1</span>
<span id="gmail-LC50" class="gmail-line" lang="plaintext"></span>
<span id="gmail-LC51" class="gmail-line" lang="plaintext">;; OPT PSEUDOSECTION:</span>
<span id="gmail-LC52" class="gmail-line" lang="plaintext">; EDNS: version: 0, flags:; udp: 512</span>
<span id="gmail-LC53" class="gmail-line" lang="plaintext">;; QUESTION SECTION:</span>
<span id="gmail-LC54" class="gmail-line" lang="plaintext">;<a href="http://www.kaixinduole.com">www.kaixinduole.com</a>. IN A</span>
<span id="gmail-LC55" class="gmail-line" lang="plaintext"></span>
<span id="gmail-LC56" class="gmail-line" lang="plaintext">;; ANSWER SECTION:</span>
<span id="gmail-LC57" class="gmail-line" lang="plaintext"><a href="http://www.kaixinduole.com">www.kaixinduole.com</a>. 21600 IN A 1.1.1.1</span>
<span id="gmail-LC58" class="gmail-line" lang="plaintext"></span>
<span id="gmail-LC59" class="gmail-line" lang="plaintext">;; Query time: 351 msec</span>
<span id="gmail-LC60" class="gmail-line" lang="plaintext">;; SERVER: 8.8.8.8#53(8.8.8.8)</span>
<span id="gmail-LC61" class="gmail-line" lang="plaintext">;; WHEN: Tue May 24 13:08:23 CST 2022</span>
<span id="gmail-LC62" class="gmail-line" lang="plaintext">;; MSG SIZE rcvd: 64</span>
<span id="gmail-LC63" class="gmail-line" lang="plaintext"></span>
<span id="gmail-LC64" class="gmail-line" lang="plaintext">[root@centos7 ~]# </span></code></pre>
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<p dir="auto">it should be cname to <a href="http://www.baidu.com" rel="nofollow noreferrer noopener">www.baidu.com</a> .but it actully respond with 1.1.1.1 ,1.1.1.1 was the previous configuration . is there any clue forthis issues ?thanks</p></div></div>