Certbot Challenges failed, invalid response from

Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. https://crt.sh/?q=example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.

My domain is: ht930.com

I ran this command: certbot --manual certonly

It produced this output:

Waiting for verification...
e[31mChallenge failed for domain ht930.come[0m
http-01 challenge for ht930.com
Cleaning up challenges
e[31mSome challenges have failed.e[0m
e[0m - The following errors were reported by the server:

Domain: ht930.com
Type: unauthorized
Detail: Invalid response from
[]: "\r\n404 Not

404 Not


To fix these errors, please make sure that your domain name was
entered correctly and the DNS A/AAAA record(s) for that domain
contain(s) the right IP address.

My web server is (include version): IIS 10

The operating system my web server runs on is (include version): Windows Server 2016 Standard Evaluation

My hosting provider, if applicable, is: none

I can login to a root shell on my machine: yes

I'm using a control panel to manage my site: no

The version of my client is: Certbot 1.11.0

I do not know what I can do to make this work. I've tried every method for authorization and it never worked. And i tested and downloaded the file off of my site before i executed the rest of the manual command.

Hi @HarrisonTrue

see that url


There is a nginx, not an IIS.

You must run Certbot on that machine.

There is no machine with nginx though. I only have the one server running off of IIS 10.

Please check that url. That's the url Letsencrypt checks to validate your domain. There is a nginx.

Read required basics:


404 Not Found


I don't think that's the output of your IIS.

PPS: There is a check of your domain, ~~3,5 hours old - https://check-your-website.server-daten.de/?q=ht930.com#url-checks


Server: nginx
Date: Wed, 20 Jan 2021 17:08:07 GMT

Only nginx - answers.

So what exactly is going on then? There's only one device in my network and doesn't have nginx so is that not my output?

Your question says: You didn't read the basics. Please change that.

Your domain name is checked, not your local machine. So you must upload the validation file to your hoster.

I concur:

curl -Iki ht930.com
HTTP/1.1 301 Moved Permanently
Server: nginx
Date: Wed, 20 Jan 2021 20:51:08 GMT
Content-Type: text/html
Content-Length: 162
Connection: keep-alive
Location: https://ht930.com/
Strict-Transport-Security: max-age=31536000

My local machine is the hoster.

And the location of that url is at a https. I'm trying to get a ssl cert so that doesnt make sense

Please show the output of:
curl -4 ifconfig.co

The ht930.com DNS record points at, which is hosted by GoDaddy, so probably not your local machine at home!

The domain was also registered through GoDaddy; did you register this domain there and then forget to point the DNS records over to your home network?

ht930.com redirects to HTTPS
https://ht930.com/ forwards (via HTML) to a completely different site:
<meta http-equiv="refresh" content="0.1;url=hXXps://lin.ee/cwxfSUU">

Since you have a Windows machine, then show this page output:
What is my IP address? β€” ifconfig.co

No I never registered the domain with godaddy. I believe my dns records are setup correctly.

The output of that page / command gives my ip,

You use GoDaddy name servers and web servers - see https://check-your-website.server-daten.de/?q=ht930.com

Host Type IP-Address is auth. βˆ‘ Queries βˆ‘ Timeout
ht930.com A Singapore//Singapore (SG) - GoDaddy.com, LLC Hostname: ip-148-72-215-11.ip.secureserver.net yes 2 0
AAAA yes
www.ht930.com CNAME ht930.com yes 1 0
A Singapore//Singapore (SG) - GoDaddy.com, LLC Hostname: ip-148-72-215-11.ip.secureserver.net yes

Name servers (one):

Domain Nameserver NS-IP
ht930.com β€’ ns73.domaincontrol.com / p21
Scottsdale/Arizona/United States (US) - Host Europe GmbH β€’

domaincontrol is GoDaddy.

You may change your A record

yourdomain ->

1 Like

I do not use godaddy name servers and webservers, that is not me. My a records are setup correctly as well

Then there must be a typo in the name.
Is your domain?: HT930.COM
Or perhaps it is:
HT93O.COM or TH930.COM or HT-930.COM

On which date did you register your domain?
And via which registrar service?

No there isn't any typo is it "HT930.com".
And I haven't registered with any registrar, would that be the problem?

Then it's not your domain.

So you can't create a certificate with that domain.

You must have an own, worldwide unique domain name with a public suffix (.com, .net, .org, .de, .cn etc.).

So ht930.com has another owner.


The answer is 19 hours old - Certbot Challenges failed, invalid response from - it's explained in that document.

1 Like

Have you ever owned/registered a domain before?
Is this your first domain name?
Do you understand the concept of Global DNS?

Step #1: You can't register/use a name that has already been registered by someone else.