微信的短链接 mmbizurl.cn 服务有什么限制吗？为什么我有时可以打开，有时却不能打开，而且本地 dns 解析 显示 127.0.0.1，但是在服务器上就会解析道真实 IP

[labulaka521]

本地解析

➜  ~ dig mmbizurl.cn

; <<>> DiG 9.10.6 <<>> mmbizurl.cn
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 57856
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;mmbizurl.cn.			IN	A

;; ANSWER SECTION:
mmbizurl.cn.		3600	IN	A	127.0.0.1

;; Query time: 7 msec
;; SERVER: 202.96.134.133#53(202.96.134.133)
;; WHEN: Mon Dec 07 19:35:12 CST 2020
;; MSG SIZE  rcvd: 45

服务器

dig ^[.^C[root@VM-0-10-centos ~]#
[root@VM-0-10-centos ~]# dig mmbizurl.cn

; <<>> DiG 9.11.4-P2-RedHat-9.11.4-16.P2.el7_8.6 <<>> mmbizurl.cn
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 47667
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;mmbizurl.cn.			IN	A

;; ANSWER SECTION:
mmbizurl.cn.		6	IN	A	121.51.79.202

;; Query time: 1 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Mon Dec 07 19:36:23 CST 2020
;; MSG SIZE  rcvd: 56

[learningman]

DNS 污染

[labulaka521]

@learningman 为毛微信的域名也会这样