Hi Julio,
I know that this question is not really related to the subject, but could I ask you to check the http proxy module in Zentyal 5?
The proxy module in transparent mode doesn't seem to work correctly at all.
For example: When you set the filter profile to allow all, everything works.
When you set the filter profile to Medium, most of the visited websites are simply blocked, even non pornographic or whatever.
Even after adding the specific website to the always allowed url rules, it keeps on getting blocked.
They also removed the antivirus module, but however the proxy module gives errors in saving the configuration about the removed antivirus module.
It seems to still check if the module is there, even when they removed it.
It looks like the Zentyal developers have done a hard copy of the proxy module without reprogramming anything.
In my 4.0 - 4.2 installations everything works like a charm, with same same setup....