求助，架设 tls+cloudflare cdn+v2， caddy 工作不正常...

按照这个攻略来做的，
https://www.bandwh.com/kxsw/30.html
以前试着成功过一台服务器，今天用新的域名，在新的另外一台服务器（另外一个 vps 提供商)上操作，结果一直是不成功，看日志提示如下，提示说是连不上 8.8.8.8 ？但应该不是的，搞不清楚，还请各位高手帮我看看问题所在？谢谢！！（部分内容做了处理）
[root@testServer /tmp]$cat /etc/caddy/caddy.conf
test.test.com
    {
     tls mytestmail@163.com
     log /var/log/caddy.log
     proxy / localhost:10000 {
      websocket
      header_upstream -Origin
      }
    }
[root@testServer /tmp]$


[root@testServer /tmp]$cat /usr/local/caddy/Caddyfile     
test.test.com
   {
    log /var/log/caddy.log
    proxy /localhost:10000 {
     websocket
     header_upstream -Origin
     }
   }
[root@testServer /tmp]$cat /etc/resolv.conf
# Generated by NetworkManager
nameserver 8.8.8.8
[root@testServer /tmp]$
[root@testServer /tmp]$
[root@testServer /tmp]$
[root@testServer /tmp]$cat /etc/sysconfig/network-scripts/ifcfg-eth0 
# XenSystem Ethernet
DEVICE=eth0
BOOTPROTO=static
IPADDR=x.x.x.x
NETMASK=255.255.255.192
GATEWAY=x.x.x.129
onboot=YES
DNS1=8.8.8.8
[root@testServer /tmp]$
[root@testServer /tmp]$
[root@testServer /tmp]$service caddy start
[root@testServer /root]$service caddy start           
[信息] Caddy 启动成功 !
[root@testServer /tmp]$
[root@testServer /tmp]$cat ./caddy.log 
Activating privacy features... 2020/03/03 09:34:41 get Agreement URL: Get https://acme-v02.api.letsencrypt.org/directory: dial tcp: lookup acme-v02.api.letsencrypt.org on 8.8.8.8:53: dial udp 8.8.8.8:53: connect: network is unreachable
Activating privacy features... 

Your sites will be served over HTTPS automatically using Let's Encrypt.
By continuing, you agree to the Let's Encrypt Subscriber Agreement at:
  https://letsencrypt.org/documents/LE-SA-v1.2-November-15-2017.pdf
Please enter your email address to signify agreement and to be notified
in case of issues. You can leave it blank, but we don't recommend it.
  Email address: 2020/03/03 10:38:44 [INFO] [test.test.com] acme: Obtaining bundled SAN certificate
2020/03/03 10:38:45 [INFO] [test.test.com] AuthURL: https://acme-v02.api.letsencrypt.org/acme/authz-v3/8888888888
2020/03/03 10:38:45 [INFO] [test.test.com] acme: use tls-alpn-01 solver
2020/03/03 10:38:45 [INFO] [test.test.com] acme: Trying to solve TLS-ALPN-01
2020/03/03 10:38:54 [INFO] Deactivating auth: https://acme-v02.api.letsencrypt.org/acme/authz-v3/8888888888
2020/03/03 10:38:54 [INFO] Unable to deactivate the authorization: https://acme-v02.api.letsencrypt.org/acme/authz-v3/8888888888
2020/03/03 10:38:55 [INFO] [test.test.com] acme: Obtaining bundled SAN certificate
2020/03/03 10:38:56 [INFO] [test.test.com] AuthURL: https://acme-v02.api.letsencrypt.org/acme/authz-v3/7777777777
2020/03/03 10:38:56 [INFO] [test.test.com] acme: use tls-alpn-01 solver
2020/03/03 10:38:56 [INFO] [test.test.com] acme: Trying to solve TLS-ALPN-01
2020/03/03 10:38:57 [INFO] Deactivating auth: https://acme-v02.api.letsencrypt.org/acme/authz-v3/7777777777
2020/03/03 10:38:57 [INFO] Unable to deactivate the authorization: https://acme-v02.api.letsencrypt.org/acme/authz-v3/7777777777
2020/03/03 10:38:58 [INFO] [test.test.com] acme: Obtaining bundled SAN certificate
2020/03/03 10:38:59 [INFO] [test.test.com] AuthURL: https://acme-v02.api.letsencrypt.org/acme/authz-v3/3121973774
2020/03/03 10:38:59 [INFO] [test.test.com] acme: use tls-alpn-01 solver
2020/03/03 10:38:59 [INFO] [test.test.com] acme: Trying to solve TLS-ALPN-01
2020/03/03 10:39:00 [INFO] Deactivating auth: https://acme-v02.api.letsencrypt.org/acme/authz-v3/3121977777
2020/03/03 10:39:00 [INFO] Unable to deactivate the authorization: https://acme-v02.api.letsencrypt.org/acme/authz-v3/3121973774
2020/03/03 10:39:01 [INFO] [test.test.com] acme: Obtaining bundled SAN certificate
2020/03/03 10:39:02 [INFO] [test.test.com] AuthURL: https://acme-v02.api.letsencrypt.org/acme/authz-v3/3121974306
2020/03/03 10:39:02 [INFO] [test.test.com] acme: Could not find solver for: tls-alpn-01
2020/03/03 10:39:02 [INFO] [test.test.com] acme: use http-01 solver
2020/03/03 10:39:02 [INFO] [test.test.com] acme: Trying to solve HTTP-01
2020/03/03 10:39:07 [INFO] Deactivating auth: https://acme-v02.api.letsencrypt.org/acme/authz-v3/3121974777
2020/03/03 10:39:07 [INFO] Unable to deactivate the authorization: https://acme-v02.api.letsencrypt.org/acme/authz-v3/3121977777
2020/03/03 10:39:08 [INFO] [test.test.com] acme: Obtaining bundled SAN certificate
2020/03/03 10:39:08 [INFO] [test.test.com] AuthURL: https://acme-v02.api.letsencrypt.org/acme/authz-v3/312777777
2020/03/03 10:39:08 [INFO] [test.test.com] acme: Could not find solver for: tls-alpn-01
2020/03/03 10:39:08 [INFO] [test.test.com] acme: use http-01 solver
2020/03/03 10:39:08 [INFO] [test.test.com] acme: Trying to solve HTTP-01
2020/03/03 10:39:09 [INFO] Deactivating auth: https://acme-v02.api.letsencrypt.org/acme/authz-v3/31666666
2020/03/03 10:39:09 [INFO] Unable to deactivate the authorization: https://acme-v02.api.letsencrypt.org/acme/authz-v3/3177777777
2020/03/03 10:39:10 [INFO] [test.test.com] acme: Obtaining bundled SAN certificate
2020/03/03 10:39:12 failed to obtain certificate: acme: error: 429 :: POST :: https://acme-v02.api.letsencrypt.org/acme/new-order :: urn:ietf:params:acme:error:rateLimited :: Error creating new order :: too many failed authorizations recently: see https://letsencrypt.org/docs/rate-limits/, url: