diff --git a/doc/schema/ildus.schema b/doc/schema/ildus.schema
new file mode 100644
index 0000000..5ffeeaf
--- /dev/null
+++ b/doc/schema/ildus.schema
@@ -0,0 +1,11 @@
+# A schema for handling ownership of Ildus DNS records for
+# storing DNS zones in LDAP
+#
+attributetype ( 1.3.6.1.4.1.4203.666.1.4096 NAME 'ildusOwner'
+	DESC 'Owner of the Ildus dNSDomain2 record'
+	SUP name )
+
+objectclass ( 1.3.6.1.4.1.4203.666.3.4096 NAME 'ildusRecord'
+	DESC 'A dNSDomain2 record that is updatable via Ildus'
+	SUP top AUXILIARY
+	MUST ildusOwner )
diff --git a/lib/ildus/server/backend.rb b/lib/ildus/server/backend.rb
index 0e97b6d..237b5c9 100644
--- a/lib/ildus/server/backend.rb
+++ b/lib/ildus/server/backend.rb
@@ -40,32 +40,73 @@ module Ildus
   
       class Basic
 
+        attr_reader :config, :user, :pass
+
         def self.inherited(subclass)
-          type = subclass.to_s.split('::').last.downcase.to_sym
+          diff = subclass.to_s.split('::') - self.to_s.split('::')
+          type = diff.to_s.split('::').last.downcase.to_sym
           Backend.register(type, subclass)
         end
+      
+        def initialize(backend_config)
+          @config = backend_config
+          @auth = false
+          @user = user
+          @pass = pass
+        end
 
-        def hostnames_of(user)
+        #################
+        # Account methods
+
+        def user=(username)
+          raise Handler::AlreadyAuthError if @auth
+          @user = username
+        end
+
+        def pass=(password)
+          raise Handler::AlreadyAuthError if @auth
+          @pass = password
+          ## STUB
+          @auth = (password == "foo")
+          ##
+        end
+
+        def authenticated?
+          @auth
+        end
+
+        def register_account
           raise Handler::NotImplementedError
         end
 
-        def add_hostname(user)
+        def unregister_account
           raise Handler::NotImplementedError
         end
 
-        def remove_hostname(user)
+        #################
+        # Backend methods
+
+        def hostnames
           raise Handler::NotImplementedError
         end
 
-        def update_hostname(user, host, addr)
+        def add_hostname(host)
           raise Handler::NotImplementedError
         end
 
-        def add_alias(user, new_alias, host)
+        def remove_hostname(host)
           raise Handler::NotImplementedError
         end
 
-        def remove_alias(user, old_alias, host)
+        def update_hostname(host, addr)
+          raise Handler::NotImplementedError
+        end
+
+        def add_alias(new_alias, host)
+          raise Handler::NotImplementedError
+        end
+
+        def remove_alias(old_alias, host)
           raise Handler::NotImplementedError
         end
 
diff --git a/lib/ildus/server/backends/ldap.rb b/lib/ildus/server/backends/ldap.rb
index 940a2e0..723abd0 100644
--- a/lib/ildus/server/backends/ldap.rb
+++ b/lib/ildus/server/backends/ldap.rb
@@ -7,9 +7,45 @@
 # Software Foundation; either version 2 of the License, or (at your option)
 # any later version.
 
+require 'ldap'
+
 module Ildus::Server::Backend
 
-  class LDAP < Basic
-  end
+  class LDAPv3 < Basic
 
-end
+    def initialize(*args)
+      super
+      @ldap = LDAP::Conn.new(config['host'])
+      @ldap.set_option(LDAP::LDAP_OPT_PROTOCOL_VERSION, 3)
+      @ldap.simple_bind(config['user'], config['pass'])
+    end
+
+    def hostnames
+      entries = Hash.new { |h, k| h[k] = [[], []] }
+      @ldap.search(config['base'], LDAP::LDAP_SCOPE_SUBTREE, 
+                   "ildusOwner=#{user}") do |entry|
+        assoc_dom, a_rr, aaaa_rr, cname_rr = 
+          ["associatedDomain", "aRecord", 
+           "aAAArecord", "cNAMErecord"].map do |attr| 
+            entry.vals(attr)
+          end
+
+        host = assoc_dom.first.gsub(/\.#{config['domain']}$/, '')
+        if a_rr
+          entries[host].first.push(*a_rr)
+        end
+        if aaaa_rr
+          entries[host].first.push(*aaaa_rr)
+        end
+        if cname_rr
+          cname = cname_rr.first.gsub(/\.#{config['domain']}$/, '')
+          entries[cname].last << host
+        end
+      end
+
+      return entries
+    end # hostnames
+    
+  end # class LDAPv3
+
+end # module Ildus::Server::Backend
diff --git a/lib/ildus/server/handler.rb b/lib/ildus/server/handler.rb
index b459410..d490c8b 100644
--- a/lib/ildus/server/handler.rb
+++ b/lib/ildus/server/handler.rb
@@ -7,7 +7,6 @@
 # Software Foundation; either version 2 of the License, or (at your option)
 # any later version.
 
-require 'ildus/server/account'
 require 'ildus/server/backend'
 
 module Ildus
@@ -65,11 +64,13 @@ module Ildus
       def initialize(server, io)
         @server  = server
         @io      = io
-        @account = Account.new
         type     = server.config["backend"]["type"]
         klass    = Backend[server.config["backend"]["type"]]
         raise "backend type `#{type}' not found" if klass.nil?
-        @backend = klass.new
+        @backend = klass.new(server.config["backend"])
+      rescue => msg
+        prot_msg 505, msg
+        raise
       end
 
       def handle_client
@@ -140,24 +141,24 @@ module Ildus
       # Commands methods
 
       def user_cmd(username)
-        @account.user = username
+        @backend.user = username
         prot_msg 331
       end
 
       def pass_cmd(password)
-        raise SetUserFirstError unless @account.user
+        raise SetUserFirstError unless @backend.user
 
-        @account.pass = password
-        if @account.authenticated?
-          prot_msg 230, @account.user
+        @backend.pass = password
+        if @backend.authenticated?
+          prot_msg 230, @backend.user
         else
           raise NotAuthError
         end
       end
 
       def updt_cmd(hostname, addr)
-        raise NotAuthError unless @account.authenticated?
-        @backend.update_hostname(@account.user, hostname, addr)
+        raise NotAuthError unless @backend.authenticated?
+        @backend.update_hostname(@backend.user, hostname, addr)
       rescue HostNotFoundError
         prot_msg 425, hostname
       rescue RecordNotFoundError
@@ -175,11 +176,17 @@ module Ildus
       end
 
       def list_cmd
-        raise NotAuthError unless @account.authenticated?
-        user = @account.user
-        #list = @backend.hostnames_of(user)
+        raise NotAuthError unless @backend.authenticated?
+        user = @backend.user
+        list = @backend.hostnames
+        h = list.inject(Hash.new) do |memo, (host, info)|
+              memo[host] = {"addresses" => info.first, "aliases" => info.last}
+              memo
+            end
+
         prot_msg_with_body 215, 
-                           "Listing of hosts (and aliases) for user #{user}\n"
+          "Listing of hosts (and aliases) for user #{user}\n" + 
+          h.to_yaml + "\n"
       end
 
       def help_cmd
diff --git a/test/tc_handler.rb b/test/tc_handler.rb
index c168c0b..3c701f0 100644
--- a/test/tc_handler.rb
+++ b/test/tc_handler.rb
@@ -1,3 +1,4 @@
+require 'stringio'
 require 'test/unit'
 require 'ildus/server'
 
@@ -12,7 +13,7 @@ class TC_HandlerTest < Test::Unit::TestCase
     assert(@hdl)
 
     class << @hdl
-      attr_reader :account
+      attr_reader :backend
       public :handle_command
     end
   end
@@ -28,28 +29,28 @@ class TC_HandlerTest < Test::Unit::TestCase
 
     # Set the user.
     @hdl.handle_command("user", ["test"])
-    assert_equal("test", @hdl.account.user)
+    assert_equal("test", @hdl.backend.user)
 
     # "list" still shouldn't be possible.
     assert_raises(Server::Handler::NotAuthError) { @hdl.handle_command("list") }
 
     # Set a different user.
     @hdl.handle_command("user", ["test2"])
-    assert_equal("test2", @hdl.account.user)
+    assert_equal("test2", @hdl.backend.user)
 
     # Give an incorrect password.
     assert_raises(Server::Handler::NotAuthError) do
       @hdl.handle_command("pass", ["secret"])
     end
-    assert_equal("secret", @hdl.account.pass)
+    assert_equal("secret", @hdl.backend.pass)
 
     # Nothing should be raised when setting the password,
     # we should be authenticated afterwards.
     assert_nothing_raised do
       @hdl.handle_command("pass", ["foo"])
     end
-    assert_equal("foo", @hdl.account.pass)
-    assert(@hdl.account.authenticated?)
+    assert_equal("foo", @hdl.backend.pass)
+    assert(@hdl.backend.authenticated?)
 
     # "list" should be possible now.
     assert_nothing_raised do