To configure the Sun Java System Web Server 6.1 to control access to server instances, edit the <server-root>/httpacl/*.https-admserv.acl files to specify the user to whom you want to grant access control privileges. Example:
acl "https-<instance>";
authenticate (user,group) {
database = "default";
method = "basic";
};
deny absolute (all) user != "UserA";