DNS MX 记录可以从我的服务器正常解析,但未被缓存/返回?

DNS MX 记录可以从我的服务器正常解析,但未被缓存/返回?

因此,我的 DNS 服务器正常返回 MX 记录:

DNS: avuna.org for type# 15 returned 0000046D61696C056176756E61036F7267

有适当的记录:

mail.avuna.org A 198.167.143.175
avuna.org MX 0 mail.avuna.org

并且在 MXLookup 上解析得很好。

但是,Google DNS 和许多其他解析器都失败了,我不知道为什么。正如 MX Lookup 所说,我的 TTL 是 60 分钟。

答案1

我注意到的一件事是,委派(在组织区域中)如下所示:

avuna.org.              86400   IN      NS      ns3.avuna.org.
avuna.org.              86400   IN      NS      ns4.avuna.org.
avuna.org.              86400   IN      NS      ns2.avuna.org.
avuna.org.              86400   IN      NS      ns5.avuna.org.
avuna.org.              86400   IN      NS      ns1.avuna.org.
ns1.avuna.org.          86400   IN      A       198.167.143.175
ns2.avuna.org.          86400   IN      A       198.167.143.175
ns3.avuna.org.          86400   IN      A       198.167.143.175
ns4.avuna.org.          86400   IN      A       198.167.143.175
ns5.avuna.org.          86400   IN      A       198.167.143.175

当然,这里有一个非常明显的问题,虽然你为名称服务器编造了五个不同的名称,但所有名称都解析到同一个地址(根据这些粘合记录),但还有这个:

$ dig @198.167.143.175 avuna.org NS +norec

; <<>> DiG 9.9.6-P1-RedHat-9.9.6-8.P1.fc21 <<>> @198.167.143.175 avuna.org NS +norec
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 44735
;; flags: qr aa; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;avuna.org.                     IN      NS

;; Query time: 167 msec
;; SERVER: 198.167.143.175#53(198.167.143.175)
;; WHEN: Thu Apr 16 18:44:24 UTC 2015
;; MSG SIZE  rcvd: 27

$

该地址的服务器声称没有名称服务器!


和这个:

$ dig @198.167.143.175 ns1.avuna.org  +norec

; <<>> DiG 9.9.6-P1-RedHat-9.9.6-8.P1.fc21 <<>> @198.167.143.175 ns1.avuna.org +norec
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 55802
;; flags: qr aa; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;ns1.avuna.org.                 IN      A

;; Query time: 162 msec
;; SERVER: 198.167.143.175#53(198.167.143.175)
;; WHEN: Thu Apr 16 18:45:45 UTC 2015
;; MSG SIZE  rcvd: 31

$

该地址的服务器还声称名称服务器的名称没有A记录!


为了解决记录问题,MX我得到了以下信息:

$ dig @198.167.143.175 avuna.org MX  +norec
;; Warning: Message parser reports malformed message packet.

; <<>> DiG 9.9.6-P1-RedHat-9.9.6-8.P1.fc21 <<>> @198.167.143.175 avuna.org MX +norec
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 15062
;; flags: qr aa; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; WARNING: Message has 17 extra bytes at end

;; QUESTION SECTION:
;avuna.org.                     IN      MX

;; Query time: 162 msec
;; SERVER: 198.167.143.175#53(198.167.143.175)
;; WHEN: Thu Apr 16 18:49:18 UTC 2015
;; MSG SIZE  rcvd: 56

$

这实际上是获奖的,因为它似乎不仅否认了应该存在的事物的存在,而且实际上发送了一些看似格式无效的东西。

这是什么类型的名称服务器软件?这实际上属于系统管理吗?还是这只是一些正在进行的实施工作的调试?

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