223.5.5.5 119.29.29.29 DNS 后端服务器不支持 IPv6

跟随国际大环境趋势，在调试部署全栈 IPv6-Only 应用时，发现

4G/5G 网络也可以正常打开✔️
运营商光猫自带的 DNS 可以正常打开✔️
境外常用公共递归 DNS 也都正常打开✔️
阿里的 223.5.5.5 和 2400:3200::1❌
腾讯的 119.29.29.29 和 2402:4e00::❌

域名使用 IPv6-Only 权威 DNS 服务器，未配置 IPv4 权威 DNS 服务器

阿里的 DNS

C:\Users\pc>dig AAAA test.ip6.plus @223.5.5.5

; <<>> DiG 9.17.15 <<>> AAAA test.ip6.plus @223.5.5.5
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 6837
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
;; QUESTION SECTION:
;test.ip6.plus.                 IN      AAAA

;; Query time: 15 msec
;; SERVER: 223.5.5.5#53(223.5.5.5) (UDP)
;; WHEN: Tue Jul 14 15:52:01 ;; MSG SIZE  rcvd: 42

C:\Users\pc>dig AAAA test.ip6.plus @2400:3200::1

; <<>> DiG 9.17.15 <<>> AAAA test.ip6.plus @2400:3200::1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 54043
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
;; QUESTION SECTION:
;test.ip6.plus.                 IN      AAAA

;; Query time: 171 msec
;; SERVER: 2400:3200::1#53(2400:3200::1) (UDP)
;; WHEN: Tue Jul 14 15:59:41 ;; MSG SIZE  rcvd: 42

腾讯的 DNS

C:\Users\pc>dig AAAA test.ip6.plus @119.29.29.29

; <<>> DiG 9.17.15 <<>> AAAA test.ip6.plus @119.29.29.29
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 50201
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: 8cf3d9bd947dc0fe (echoed)
;; QUESTION SECTION:
;test.ip6.plus.                 IN      AAAA

;; Query time: 803 msec
;; SERVER: 119.29.29.29#53(119.29.29.29) (UDP)
;; WHEN: Tue Jul 14 16:01:03 ;; MSG SIZE  rcvd: 54

C:\Users\pc>dig AAAA test.ip6.plus @2402:4e00::

; <<>> DiG 9.17.15 <<>> AAAA test.ip6.plus @2402:4e00::
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 35102
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: b5cca1a5fb63b8d6 (echoed)
;; QUESTION SECTION:
;test.ip6.plus.                 IN      AAAA

;; Query time: 794 msec
;; SERVER: 2402:4e00::#53(2402:4e00::) (UDP)
;; WHEN: Tue Jul 14 16:01:57 ;; MSG SIZE  rcvd: 54

运营商的 DNS

C:\Users\pc>dig AAAA test.ip6.plus

; <<>> DiG 9.17.15 <<>> AAAA test.ip6.plus
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 33971
;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;test.ip6.plus.                 IN      AAAA

;; ANSWER SECTION:
test.ip6.plus.          600     IN      CNAME   cdn6.ipv6-only.cn.
cdn6.ipv6-only.cn.      600     IN      CNAME   cdn6-cm.ipv6-only.cn.
cdn6-cm.ipv6-only.cn.   600     IN      AAAA    2409:8c28:7ce0:203::27ae:6129
cdn6-cm.ipv6-only.cn.   600     IN      AAAA    2409:8c20:5021:108::2496:8a29

;; Query time: 4 msec
;; SERVER: 211.140.13.188#53(211.140.13.188) (UDP)
;; WHEN: Tue Jul 14 16:05:18 ;; MSG SIZE  rcvd: 140

C:\Users\pc>dig AAAA test.ip6.plus

; <<>> DiG 9.17.15 <<>> AAAA test.ip6.plus
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 31018
;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;test.ip6.plus.                 IN      AAAA

;; ANSWER SECTION:
test.ip6.plus.          600     IN      CNAME   cdn6.ipv6-only.cn.
cdn6.ipv6-only.cn.      600     IN      CNAME   cdn6-cm.ipv6-only.cn.
cdn6-cm.ipv6-only.cn.   600     IN      AAAA    2409:8c28:7ce0:203::27ae:6129
cdn6-cm.ipv6-only.cn.   600     IN      AAAA    2409:8c20:5021:108::2496:8a29

;; Query time: 4 msec
;; SERVER: 2409:8028:2000::1111#53(2409:8028:2000::1111) (UDP)
;; WHEN: Tue Jul 14 16:11:41 ;; MSG SIZE  rcvd: 140