Failed authorization procedure Centos 6

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My domain is:

I ran this command: ./letsencrypt-auto --apache -d

It produced this output: Failed authorization procedure. (http-01): urn:ietf:params:acme:error:unauthorized :: The client lacks sufficient authorization :: Invalid response from “<!DOCTYPE HTML PUBLIC “-//IETF//DTD HTML
2.0//EN”>\n<html><head>\n<title>404 Not
Found</title>\n</head><body>\n<h1>Not Found</h1>\n<p”

My web server is (include version): apache Apache/2.2.15

The operating system my web server runs on is (include version): Centos 6.8

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


I see that a certificate is issued today (US-EST)…

Did you managed to resolve the issue?

Thank you

Unfortunately I could not solve the problem,
but since I could not be without the certificate, I and co-workers look for other ways to generate it.

We are now using to generate the certificates until we solve the problem


Could you please try to place a file at and see if you could see it in the browser?

Thank you

you can try to access:
Sorry for the delay to answer you

Hi @jgt-josegeraldo

your file works. So you know your correct webroot. Perhaps try to use this information.

./letsencrypt-auto -a webroot -i apache -w yourWebroot -d -d

I've added the www version because you have a dns-entry.

But your certificate has only one name, so there is a certificate error.

thank you very much
it worked out

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