I am thinking of using ISPconfig on a DNS master server and then pure bind slaves. Everything looks like it should work well however I need to give clients access to their domain records...this is kinda possible but I need to restrict it to adding/editing records only not adding new zones or editing TTLs etc. Also can the client logins be moved to a different port than the "admin" account login, so that admin access can be limited via firewall? Is this possible with the current version of ISPconfig3?