Why letsencrypt takes my NS name?

Hi all,

My domain is:
psychotherapiebelgique.be

I ran this command:
/opt/letsencrypt/letsencrypt-auto --staging --break-my-certs

It produced this output:
`Failed authorization procedure. psychotherapiebelgique.be (tls-sni-01): urn:acme:error:unauthorized :: The client lacks sufficient authorization :: Incorrect validation certificate for tls-sni-01 challenge. Requested 4133bd3883f9b6a34a17fddb3b7c86ff.556fcf4f4b566cc4a4b6030be3580a76.acme.invalid from 5.135.185.6:443. Received 1 certificate(s), first certificate had names “ns321781.ip-5-135-185.eu

IMPORTANT NOTES:

  • The following errors were reported by the server:

    Domain: psychotherapiebelgique.be
    Type: unauthorized
    Detail: Incorrect validation certificate for tls-sni-01 challenge.
    Requested
    4133bd3883f9b6a34a17fddb3b7c86ff.556fcf4f4b566cc4a4b6030be3580a76.acme.invalid
    from 5.135.185.6:443. Received 1 certificate(s), first certificate
    had names “ns321781.ip-5-135-185.eu

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

My web server is (include version):
Apache 2

The operating system my web server runs on is (include version):
Debian Jessie

My hosting provider, if applicable, is:
Kimsufi (dedicated server)

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 don’t understand why it takes the NS name, any ideas about what I missed, please?

For info, a dig returns the requested A:

;; ANSWER SECTION: psychotherapiebelgique.be. 7200 IN A 5.135.185.6

Hi @Lcfvs,

I posted some common reasons for this problem at

Hi @schoen thanks a lot, I check that in details tomorrow :slight_smile:

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