访问控制的工作原理

version 3.0;
# The following "es-internal" rules protect files such
# as icons and images related to Sun Java System Web Proxy Server.
# These "es-internal" rules should not be modified.
  acl "es-internal";
  allow (read, list, execute,info) user = "anyone";
  deny (write, delete) user = "anyone";

# The following rules deny access to the directory "web"
# to everyone not in the directory server and deny everyone
# in the directory server who is not in GroupB.
# Only the users in GroupB are allowed read, execute, list,
# and info permissions. GroupA cannot gain access to the
# directory "web" even though (in the ACL rule below) they
# can access the directory "my_stuff". Furthermore, members
# of GroupB cannot write or delete files.
  acl "path=/export/user/990628.1/docs/my_stuff/web/";
  authenticate (user,group) {
     database = "default";
     method = "basic";
  };
  deny (all)
  (user = "anyone");

  allow (read,execute,list,info)
  (group = "GroupB");

# The following rule denies everyone not in the directory
# server and denies everyone in the directory server except
# users with the ID of "SpecificMemberOfGroupB". The ACL rule
# in this setting also has a requirement that the user
# connect from a specific IP address. The IP address setting
# in the rule is optional, and has been added for extra
# security. Also, this ACL rule has a Customized prompt
# of "Presentation Owner". This Customized prompt appears
# in the username and password dialog box in the client’s
# browser.

  acl "path=/export/user/990628.1/docs/my_stuff/web/presentation.html";
  authenticate (user,group) {
     database = "default";
     method = "basic";
     prompt = "Presentation Owner";
  };
  deny (all)
  (user = "anyone" or group = "my_group");
  allow (all)
  (user = "SpecificMemberOfGroupB") and
  (ip = "208.12.54.76");

# The following ACL rule denies everyone not in the directory
# server and everyone in the directory server except for
# GroupA and GroupB access to the directory "my_stuff"
  acl "path=/export/user/990628.1/docs/my_stuff/";
  authenticate (user,group) {
     database = "default";
     method = "basic";
  };
  deny (all)
  (user = "anyone");
  allow (read,execute,list,info)
  (group = "GroupA,GroupB");