### Author:  [@jeffsani](https://community.letsencrypt.org/u/jeffsani)
#### Post date: [January 24, 2022, 5:44pm UTC](https://community.letsencrypt.org/t/an-unexpected-error-occurred-httpsconnectionpool/170352/1 "2022-01-24T17:44:48Z")
An unexpected error occurred:
requests.exceptions.ConnectionError: HTTPSConnectionPool(host='[acme-v02.api.letsencrypt.org](http://acme-v02.api.letsencrypt.org)', port=443): Max retries exceeded with url: /directory (Caused by NewConnectionError('\: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution'))
Ask for help or search for solutions at [https://community.letsencrypt.org](https://community.letsencrypt.org). See the logfile /var/log/letsencrypt/letsencrypt.log or re-run Certbot with -v for more details.
root@letsencrypt:/etc# dig [acme-v02.api.letsencrypt.org](http://acme-v02.api.letsencrypt.org) @8.8.8.8
; \<\<\>\> DiG 9.16.1-Ubuntu \<\<\>\> [acme-v02.api.letsencrypt.org](http://acme-v02.api.letsencrypt.org) @8.8.8.8
;; global options: +cmd
;; Got answer:
;; -\>\>HEADER\<\<- opcode: QUERY, status: NOERROR, id: 56221
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;[acme-v02.api.letsencrypt.org](http://acme-v02.api.letsencrypt.org). IN A
;; ANSWER SECTION:
[acme-v02.api.letsencrypt.org](http://acme-v02.api.letsencrypt.org). 7200 IN CNAME [prod.api.letsencrypt.org](http://prod.api.letsencrypt.org).
[prod.api.letsencrypt.org](http://prod.api.letsencrypt.org). 300 IN CNAME [ca80a1adb12a4fbdac5ffcbc944e9a61.pacloudflare.com](http://ca80a1adb12a4fbdac5ffcbc944e9a61.pacloudflare.com).
[ca80a1adb12a4fbdac5ffcbc944e9a61.pacloudflare.com](http://ca80a1adb12a4fbdac5ffcbc944e9a61.pacloudflare.com). 300 IN A 172.65.32.248
;; Query time: 48 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Mon Jan 24 17:31:31 UTC 2022
;; MSG SIZE rcvd: 155
root@letsencrypt:/etc#
Is my IP blocked?
---
### Author:  [@MikeMcQ](https://community.letsencrypt.org/u/MikeMcQ)
#### Post date: [January 24, 2022, 5:48pm UTC](https://community.letsencrypt.org/t/an-unexpected-error-occurred-httpsconnectionpool/170352/2 "2022-01-24T17:48:50Z")
That is not the usual message when an IP is blocked.
But, you will need to share your IP address or domain name for that to be checked.
Is this a persistent problem? Or a temp one as noted in the message?
---
### Author:  [@Osiris](https://community.letsencrypt.org/u/Osiris)
#### Post date: [January 24, 2022, 5:52pm UTC](https://community.letsencrypt.org/t/an-unexpected-error-occurred-httpsconnectionpool/170352/3 "2022-01-24T17:52:16Z")
> [@MikeMcQ](#):
>
> That is not the usual message when an IP is blocked.
>
> But, you will need to share your IP address or domain name for that to be checked.
This error is fully client-side, so has nothing to do with being blocked or not.
---
### Author:  [@jeffsani](https://community.letsencrypt.org/u/jeffsani)
#### Post date: [January 24, 2022, 5:52pm UTC](https://community.letsencrypt.org/t/an-unexpected-error-occurred-httpsconnectionpool/170352/4 "2022-01-24T17:52:39Z")
My IP is 76.22.1.7. It is a persistent problem now. I have not encountered this before.
---
### Author:  [@Osiris](https://community.letsencrypt.org/u/Osiris)
#### Post date: [January 24, 2022, 5:52pm UTC](https://community.letsencrypt.org/t/an-unexpected-error-occurred-httpsconnectionpool/170352/5 "2022-01-24T17:52:57Z")
Is the IP `8.8.8.8` also set up as your hosts DNS server? I.e., in `/etc/resolv.conf`?
---
### Author:  [@jeffsani](https://community.letsencrypt.org/u/jeffsani)
#### Post date: [January 24, 2022, 6:03pm UTC](https://community.letsencrypt.org/t/an-unexpected-error-occurred-httpsconnectionpool/170352/6 "2022-01-24T18:03:35Z")
root@letsencrypt:/etc/netplan# systemd-resolve --status | grep 'DNS Servers' -A2
DNS Servers: 8.8.8.8
8.8.4.4
192.168.121.20
root@letsencrypt:/etc/netplan#
---
### Author:  [@jeffsani](https://community.letsencrypt.org/u/jeffsani)
#### Post date: [January 24, 2022, 6:05pm UTC](https://community.letsencrypt.org/t/an-unexpected-error-occurred-httpsconnectionpool/170352/7 "2022-01-24T18:05:55Z")
Strange. Just tried this again and now it seems to be working. Sorry for firedrill
---
### Author:  [@rg305](https://community.letsencrypt.org/u/rg305)
#### Post date: [January 24, 2022, 9:19pm UTC](https://community.letsencrypt.org/t/an-unexpected-error-occurred-httpsconnectionpool/170352/8 "2022-01-24T21:19:05Z")
> [@jeffsani](#):
>
> 192.168.121.20
Does that DNS server work?
---
### Author:  [@system](https://community.letsencrypt.org/u/system)
#### Post date: [February 23, 2022, 9:19pm UTC](https://community.letsencrypt.org/t/an-unexpected-error-occurred-httpsconnectionpool/170352/9 "2022-02-23T21:19:54Z")
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