Welcome to this community based support forum. All the people here are volunteers and we reply when we know something about the subject and when we have the time to do so. And we hope you will join us in helping others as well!
To make sure your problem is solved as quickly as possible, there are some things you should do before posting and some things you should include in your first post.
As eBox now has changed name to Zentyal, there will be a bit of a mix of names out there. Everything up to v. 2.0rc1 is called eBox. But even in Zentyal 2.0rc1 package names will refer to eBox. I think it is safe to assume that this will soon be corrected.
First and foremost: Search. There is a really good chance that your problem has been encountered before, so search and look. We know it sometimes can be difficult to find the right words to search for as your first language might not be English. But give it a try, and maybe even mention in the post what you searched for.
The next thing should be to make sure your installation is up to date. The developers work on the system every day and fix bugs as fast as they can. To do this, give these commands from the commandline on the server:
sudo apt-get update
sudo apt-get upgrade
MAKE YOUR POST
If this do not solve your problem, make a post with a subject that describe your problem. Avoid subjects like "Help!" or "I have a problem...". Do not add any prefixes to the subject, except for [SOLVED] when the issue has been resolved. Go straight to the point without any emotion.
First of all, state your eBox or Zentyal version and to be sure, the version of Ubuntu server.
Function and situation
Is this a server that is in production (actively used) or is it a setup that is only for testing?
Is it installed on a PC, or is it running in a virtual machine like VirtualBox etc. ?
How is it connected to the internet?
Is this server the gateway to the internet for your network?
Zentyal module versions
There are a couple of other things you can add as well. Run this command and add the output to the post:
dpkg -l | grep "ebox-"
To go a bit more in depth, you can also put Zentyal in debug mode, try to reproduce your problem and upload the logs so we can take a look at them. Here is how to do this (open a remote console via SSH or type the commands in a console on the server):
sudo nano /etc/ebox/99ebox.conf
Set debug = yes and save the file.
sudo /etc/init.d/ebox apache restart
Try to reproduce the bug. Repeat the steps that made Zentyal crash or fail in the first place. Remember to include these steps in your post. We need them to be able to reproduce the problem!
Show us your ebox.log
You find the Zentyal log at /var/log/ebox/ebox.log
Open a browser at http://paste.ubuntu.com/
and paste the content from the log here. Then add the link to your post.
For other logs on the server, see separate post about the various logs in Ubuntu Server.