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Sorry to hear you’re facing problems 
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Nextcloud version (eg, 12.0.2): 14.0.4.2
Operating system and version (eg, Ubuntu 17.04): Raspian Linux 9
Apache or nginx version (eg, Apache 2.4.25): Apache 2
PHP version (eg, 7.1): 7.2.9
Hi, i had problems with my Apache Server, which I could solve. Now everything seems fine, from my local network. But unfortunately I am not able to connect to my Server from Outside my local network.
Every time I try there is a timeout failure.
nc-info says everything is fine.
ping my server from outside is possible
https://www.yougetsignal.com/tools/open-ports/
says: Port 80 and Port 443 are available
Now I am a little confused and need some help to find the error.
Thank you for your help.
Is this the first time you’ve seen this error? (Y/N): Y
Update:
ReInstalled Letsencrypt service -> No change.
ReInit DynDns Service -> No change.
I am getting low on ideas where the problem may be… Glad to get some inspiration.
The output of your Apache/nginx/system log in /var/log/____:
<summary>HTTPd logs</summary>
[Mon Dec 17 06:25:02.487506 2018] [ssl:warn] [pid 3311:tid 1996181872] AH01909: localhost:4443:0 server certificate does NOT include an ID which matches the server name
[Mon Dec 17 06:25:03.000735 2018] [mpm_event:notice] [pid 3311:tid 1996181872] AH00489: Apache/2.4.25 (Raspbian) OpenSSL/1.0.2l configured – resuming normal operations
[Mon Dec 17 06:25:03.000812 2018] [core:notice] [pid 3311:tid 1996181872] AH00094: Command line: ‘/usr/sbin/apache2’
</details>