Hello cloudflare community
Since a while , we did have an issue to renew let’s encrypt certificate from our server ICEWARP : as you can see we can reach the let’s encrypt server easily :
type or paste copro ~]$ curl -acme-v02.api.letsencrypt.org](https://acme-v02.api.letsencrypt.org/)
* About to connect() to [acme-v02.api.letsencrypt.org](http://acme-v02.api.letsencrypt.org/) port 443 (#0)
* Trying 172.65.32.248...
* Connected to [acme-v02.api.letsencrypt.org](http://acme-v02.api.letsencrypt.org/) (172.65.32.248) port 443 (#0)
* Initializing NSS with certpath: sql:/etc/pki/nssdb
* CAfile: /etc/pki/tls/certs/ca-bundle.crt
CApath: none
* SSL connection using TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
* Server certificate:
* subject: CN=acme-v02.api.letsencrypt.org
* start date: mai 07 18:19:30 2023 GMT
* expire date: août 05 18:19:29 2023 GMT
* common name: acme-v02.api.letsencrypt.org
* issuer: CN=R3,O=Let's Encrypt,C=US
> GET / HTTP/1.1
> User-Agent: curl/7.29.0
> Host: [acme-v02.api.letsencrypt.org](http://acme-v02.api.letsencrypt.org/)
> Accept: */*
< HTTP/1.1 200 OK
< Server: nginx
< Date: Mon, 03 Jul 2023 22:33:31 GMT
< Content-Type: text/html
< Content-Length: 1540
< Last-Modified: Thu, 23 Jun 2022 21:26:03 GMT
< Connection: keep-alive
< ETag: "62b4da6b-604"
< X-Frame-Options: DENY
< Strict-Transport-Security: max-age=604800
de here
please find below the ping results 
PING 172.65.32.248 (172.65.32.248) 56(84) bytes of data.
64 bytes from 172.65.32.248: icmp_seq=1 ttl=59 time=1.53 ms
64 bytes from 172.65.32.248: icmp_seq=2 ttl=59 time=1.52 ms
64 bytes from 172.65.32.248: icmp_seq=3 ttl=59 time=1.59 ms
64 bytes from 172.65.32.248: icmp_seq=4 ttl=59 time=1.61 ms
64 bytes from 172.65.32.248: icmp_seq=5 ttl=59 time=1.41 ms
64 bytes from 172.65.32.248: icmp_seq=6 ttl=59 time=1.71 ms
64 bytes from 172.65.32.248: icmp_seq=7 ttl=59 time=1.43 ms
^C64 bytes from 172.65.32.248: icmp_seq=8 ttl=59 time=1.79 ms
— 172.65.32.248 ping statistics —
8 packets transmitted, 8 received, 0% packet loss, time 7309ms
rtt min/avg/max/mdev = 1.414/1.578/1.791/0.132 ms
as you can see , there is no issue from our server to LE Server in terme of communication ,
but we did notice that there is abrupt communication break between the server let’s encrypt and icewarp (our server ) in return
following our deep investigation we highly suspect that there is a block from cloudflare networ k
1?: [LOCALHOST] pmtu 1300
1: gateway 0.197ms
1: gateway 0.249ms
2: 197.140.2.17 0.706ms
3: 172.31.2.105 1.512ms
4: 172.17.116.164 7.004ms
5: 41.110.36.3 10.990ms
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Too many hops: pmtu 1300
Resume: pmtu 1300
the IP address 41.110.36.3 belongs to our local provider which he told us that there is a only a cash of LE in algeria but regarding the firewall blocking it’s under cloudlflare ,
please we need your help on this case ,