刚打开主页 502 了

$ dig www.v2ex.com

; <<>> DiG 9.8.3-P1 <<>> www.v2ex.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 28122
;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.v2ex.com. IN A

;; ANSWER SECTION:
www.v2ex.com. 14772 IN CNAME v2ex.global.zgslb.net.
v2ex.global.zgslb.net. 1325 IN CNAME v2ex.china.zgslb.net.
v2ex.china.zgslb.net. 22 IN A 183.47.219.21
v2ex.china.zgslb.net. 22 IN A 121.14.111.19
v2ex.china.zgslb.net. 22 IN A 58.218.210.17

;; Query time: 72 msec
;; SERVER: 192.168.2.1#53(192.168.2.1)
;; WHEN: Sat Jun 10 17:16:01 2017
;; MSG SIZE rcvd: 147