**Open Wiki**
Anyone can read and write in this wiki without registering. Typically installed on the intranet.
**Semi-open wiki**
Only registered users can write here. Anyone can post comments.
**Protected wiki**
Anyone can read in this wiki, but only users who have registered in the wiki are allowed to write.
**Private Wiki**
Only members of the cluster can read and write in a private wiki. If you want to participate in a private wiki, the administrator / owner must activate you.