auth-type

Specifies the type of authorization to be used. The type should be “basic” unless you are running a UNIX proxy and are going to use your own function to perform authentication. 

realm

A string (enclosed in double-quotation marks) sent to the client application so users can see what object they need authorization for. 

auth-user

(optional) specifies a list of users who get access. The list should be enclosed in parentheses with each user name separated by the pipe | symbol. 

auth-group

(optional) specifies a list of groups that get access. Groups are listed in the password-type file.