Can I upload my own add-ons to my server?

Yes, we realize that one of the advantages of WordPress, Joomla and others are a huge amount thanks to the active community of Internet users. We recommend that you regularly keep up-to-date with modules, templates, plugins, etc.

We, for our part, also take care of the security of your websites not allowing scripts of unknown origin to cause damage. On Smarthost servers we have implemented protection against over 4000 exploits

https://www.smarthost.eu/anti-exploit-system