Unauthorized response with HTML error


I am having problem with enabling SSL to my website “simo.photos” . I run this website as personal on RPI in home environment, using DynDNS to route traffic to RPI.

IP you can see below is not an IP of my NW, as I mentioned, I do use DynDNS to translate this domain to another, there is also CNAME used in final translation.

When trying to run certbot even on manual mode, I getting following error:
Domain: simo.photos
Type: unauthorized
Detail: Invalid response from
[92.240.253.xyz]: " \n

\n <t"

I am using file/folder permission www-data and for this case made “chmod 777”.

Any ideas?


1 Like

Hi @ricaard

your dns setup is wrong - https://check-your-website.server-daten.de/?q=simo.photos

Your ip:

Host T IP-Address is auth. ∑ Queries ∑ Timeout
simo.photos A Bratislava/Slovakia (SK) - LightStorm Communications s.r.o. No Hostname found yes 1 0
AAAA yes
www.simo.photos A Bratislava/Slovakia (SK) - LightStorm Communications s.r.o. No Hostname found yes 1 0
AAAA yes

Checking http://www.simo.photos/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de there is a frame, that can't work.

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd"> 
<html> <head><title>www.simo.photos</title> <meta http-equiv="Content-Type" content="text/html; charset=windows-1250" /> </head> 
<frameset rows="*,0" border="0" framespacing="0" framecolor="#00000"> 
<frame src="http://simophotos.redirectme.net" frameborder="0" marginwidth="0" marginheight="0"> </frameset> 
<div style="font-size:2em;"> 
<a href="http://simophotos.redirectme.net"></a> </div> </body>
 </noframes> </html> 

So Letsencrypt checks the wrong ip address.

If possible, create a CNAME simo.photos ->> simophotos.redirectme.net.

If that isn't possible, your setup may not work.

Or use dns validation to create a certificate, then you don't need a working ip address.

1 Like

Hi @JuergenAuer

thanks for quick reply.

Could you please describe more about your last reco:
“Or use dns validation to create a certificate, then you don’t need a working ip address.” ?


1 Like



But that's the wrong way.

Your frame

<frame src="http://simophotos.redirectme.net"

supports only http, so

  • you need a certificate with simophotos.redirectme.net
  • if you have such a certificate, the frame would connect http, so it's not visible
  • if you use https://simo.photos, the http frame is blocked because it's mixed content

-->> a frame is the wrong way.

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Thanks @JuergenAuer

I am going to change DNS records at my DNS provider and try it with CNAME definition.

Keep you updated.

1 Like

Dear @JuergenAuer

thank you for your hint about defining simo.photos with CNAME of redirected domain.

Now certbot script passed succesfully and I am able to access my site secured.

Have a blessed Christmas time.

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