睡一觉后，发现bero的1o鸡连不到cloudflare相关的ip了，表现在：

  1. 开了cloudflare cdn的域名无法访问服务了
  2. 鸡鸡上使用1.1.1.1的dns无法解析，且ping1.1.1.1和cloudflare.com也不通
  3. 其它的都正常，比如用谷歌的dns或者ping谷歌

发了工单还没回 

root@kvm14032:~# nslookup google.com;; communications error to 1.1.1.1#53: timed out;; communications error to 1.1.1.1#53: timed out;; communications error to 1.1.1.1#53: timed out;; no servers could be reachedroot@kvm14032:~# ping 1.1.1.1 -c 3PING 1.1.1.1 (1.1.1.1) 56(84) bytes of data.--- 1.1.1.1 ping statistics ---3 packets transmitted, 0 received, 100% packet loss, time 2037msroot@kvm14032:~# nslookup google.com 8.8.8.8Server:         8.8.8.8Address:        8.8.8.8#53Non-authoritative answer:Name:   google.comAddress: 216.58.206.46Name:   google.comAddress: 2a00:1450:4001:81c::200eroot@kvm14032:~# ping 8.8.8.8PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.64 bytes from 8.8.8.8: icmp_seq=1 ttl=119 time=0.454 ms64 bytes from 8.8.8.8: icmp_seq=2 ttl=119 time=0.463 ms64 bytes from 8.8.8.8: icmp_seq=3 ttl=119 time=0.442 ms^C--- 8.8.8.8 ping statistics ---3 packets transmitted, 3 received, 0% packet loss, time 2034msrtt min/avg/max/mdev = 0.442/0.453/0.463/0.008 ms