北京电信本地 DNS 给的 TTL 是 618797164，近 20 年，是怎么回事？

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;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4701
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 0

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

;; ANSWER SECTION:
www.baidu.com. 618797164 IN CNAME www.a.shifen.com.
www.a.shifen.com. 618796132 IN A 220.181.38.150
www.a.shifen.com. 618796132 IN A 220.181.38.149

;; Query time: 0 msec
;; SERVER: 219.141.140.10#53(219.141.140.10)
;; WHEN: Thu Dec 26 17:55:15 2019
;; MSG SIZE rcvd: 90

Supplement 1 · Dec 27, 2019

又恢复正常的，感觉像是 ISP 的特殊操作

8 replies • 2020-02-18 21:03:00 +08:00