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I'm new in this area (ubuntu, server, cloud, networking), so I might be doing some obvious mistakes.

I have installed NextCloud using Snap Package and it seems to run well on http, accessible at a forwarded external port; but for https, when executing the sudo nextcloud.enable-https lets-encrypt command, I get the following error:

Domain: ycon.go.ro
Type:   connection
Detail: 79.112.92.172: Fetching
https://255.255.255.255:443/.well-known/acme-challenge/BTIe8laV2OiyRufh_842IhcenZ9ONo9cA0gD5MUbF0k:
   Invalid host in redirect target "255.255.255.255". Only domain
   names are supported, not IP addresses

Mentions:

  • the ISP gave me a subdomain for dynamic DNS, which is ycon.go.ro, and for that I've requested the certificate;
  • I know https can be issued for such a domain (.go.ro) as I've seen it at a friend who installed NextCloud with the Debian script;

Also, I have noticed that if I try to open the http://ycon.go.ro domain in the browser, I get redirected to https://255.255.255.255 . Only when opening the domain at the forwarded external port I can see NextCloud running.

What am I doing wrong?

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8
  • 1
    I don't know, but 255.255.255.255 definitely isn't anywhere near a valid IP address. Something is probably very wrong with your server config.
    – Massimo
    Commented Apr 14 at 21:42
  • please show us the domain, we can't use the glassball for investigation.
    – djdomi
    Commented Apr 15 at 5:16
  • @djdomi right; done
    – Andrei
    Commented Apr 15 at 7:06
  • 1
    Your server replies 406 Not Acceptable.
    – vidarlo
    Commented Apr 15 at 7:09
  • @vidarlo On https, yes, but as I don't have a SSL certificate, isn't that normal? And on http, it redirects to 255.255.255.255, as certbot says in the log.
    – Andrei
    Commented Apr 15 at 7:15

1 Answer 1

Reset to default
5 
C:\>wget http://ycon.go.ro
--2024-04-15 10:02:22--  http://ycon.go.ro/
Resolving ycon.go.ro... 79.112.92.172
Connecting to ycon.go.ro|79.112.92.172|:80... connected.
HTTP request sent, awaiting response... 302 Found
Location: https://255.255.255.255:443/ [following]

The web server at 79.112.92.172 redirects http to https://255.255.255.255:443/ - you'll need to configure your web server correctly. It's not related to the SSL certificate.

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3
  • I know I am a noob, but do you have any advice of where (directory or file) should I look in order to find that redirect? NextCloud has been installed with Snap on a clean Ubuntu 20.04, so all configurations should be default at the moment.
    – Andrei
    Commented Apr 16 at 7:00
  • The forwarding is configured in your web server.
    – Zac67
    Commented Apr 16 at 7:17
  • 1
    Such a redirect is by no means "a default".
    – Nikita Kipriyanov
    Commented Apr 16 at 8:51

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