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

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