# Some challenges have failed

**URL:** <https://community.letsencrypt.org/t/some-challenges-have-failed/202195>\
**Category:** Help\
**Created:** [July 21, 2023, 12:03pm UTC](https://community.letsencrypt.org/t/some-challenges-have-failed/202195 "2023-07-21T12:03:33Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![snkkgp](https://avatars.discourse-cdn.com/v4/letter/s/ad7895/32.png) [@snkkgp](https://community.letsencrypt.org/u/snkkgp)\
**Post date:** [July 21, 2023, 12:03pm UTC](https://community.letsencrypt.org/t/some-challenges-have-failed/202195/1 "2023-07-21T12:03:33Z")

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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. [crt.sh | example.com](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: math.iisc.ac.in

I ran this command: sudo certbot --apache

It produced this output: Saving debug log to /var/log/letsencrypt/letsencrypt.log  
Please enter the domain name(s) you would like on your certificate (comma and/or  
space separated) (Enter 'c' to cancel): math.iisc.ac.in  
Requesting a certificate for math.iisc.ac.in

Certbot failed to authenticate some domains (authenticator: apache). The Certificate Authority reported these problems:  
Domain: math.iisc.ac.in  
Type: unauthorized  
Detail: 14.139.128.249: Invalid response from [http://math.iisc.ac.in/.well-known/acme-challenge/rJ2JWjfk8TqPmXjRYDPLTaHuoOR1gg068bINTe-arbg:](http://math.iisc.ac.in/.well-known/acme-challenge/rJ2JWjfk8TqPmXjRYDPLTaHuoOR1gg068bINTe-arbg:) 404

Hint: The Certificate Authority failed to verify the temporary Apache configuration changes made by Certbot. Ensure that the listed domains point to this Apache server and that it is accessible from the internet.

Some challenges have failed.  
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.

My web server is (include version): Apache/2.4.52 (Ubuntu)

The operating system my web server runs on is (include version): Ubuntu 20.04.6 LTS

My hosting provider, if applicable, is:

I can login to a root shell on my machine (yes or no, or I don't know): yes

I'm using a control panel to manage my site (no, or provide the name and version of the control panel): no

The version of my client is (e.g. output of `certbot --version` or `certbot-auto --version` if you're using Certbot): certbot 2.6.0

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**Author:** ![Osiris](https://avatars.discourse-cdn.com/v4/letter/o/839c29/32.png) [@Osiris](https://community.letsencrypt.org/u/Osiris)\
**Post date:** [July 21, 2023, 1:39pm UTC](https://community.letsencrypt.org/t/some-challenges-have-failed/202195/2 "2023-07-21T13:39:48Z")

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Looks like a misconfigured Apache.

Please show the output of:

```plaintext
sudo apachectl -t -D DUMP_VHOSTS

```

You may need to use `apache2ctl` or even `httpd` instead of `apachectl`

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**Author:** ![system](https://global.discourse-cdn.com/letsencrypt/original/3X/c/a/ca6c06ea1ea201324bba7048c6841ce60236468d.png) [@system](https://community.letsencrypt.org/u/system)\
**Post date:** [August 20, 2023, 1:39pm UTC](https://community.letsencrypt.org/t/some-challenges-have-failed/202195/3 "2023-08-20T13:39:59Z")

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