I have currently customized ISPConfig 3 to have the IP-Address selection in Web Domain Domain tab, to instead be in the Web Domain Options tab. This prevents users from choosing a private IP address that someone else may already be using and allows only admins to change the IP address. What do you think of this idea?
Please see roadmap: http://bugtracker.ispconfig.org/index.php?do=details&task_id=1113&project=3 This issue has already been addressed and will be released in 3.0.4