Ok, sorry for my incomplete information before.
apache is running, imscp_panel.log is empty. Trying to activate a plugin I get "an unexpected error occurred"
The Server is driven by Ubuntu 16.04 Xenial Xerus,
# php -version
PHP 7.0.18-1+deb.sury.org~xenial+1 (cli) (built: Apr 11 2017 14:36:44) ( NTS )
Copyright (c) 1997-2017 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2017 Zend Technologies with Zend OPcache v7.0.18-1+deb.sury.org~xenial+1, Copyright (c) 1999-2017, by Zend Technologies
IMSCP Version is 1.4.3 now:
Browser is Firefox 45.8.0
I'm using MariaDB
The exact steps to reproduce the problem:
About two weeks ago: New setup of the server from a clean install with Ubuntu 16.04, updating the sources and upgrading the installed distribution, setting up new, clean imscp 1.4.2 (no backups used), added plugins and set up one domain. Worked like a charm, no problems so far.
Problem occurred today: setting up a new domain, no errors, but not reachable. The nameserver points to the right IP, but it is not found on the Host.
Tried to upgrade from i-mscp 1.4.2 to 1.4.3 following the advice, first
to update repositories, then upgrade dist, and then upgrade i-mscp.
Errors concerning imscp showed up, but upgrading i-mscp to 1.4.3
performed without any error. apt-get update && apt-get
dist-upgrade afterwards also.
Problem: no domain is reachable, only the control-panel is reachable. Now I see that there is a new problem with the Postgrey-Plugin, which didn't show up before, but which is not the deal here.