diff --git a/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/glyptodon/guacamole/auth/jdbc/user/ModeledUser.java b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/glyptodon/guacamole/auth/jdbc/user/ModeledUser.java
index 36479f96c..aeceff64b 100644
--- a/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/glyptodon/guacamole/auth/jdbc/user/ModeledUser.java
+++ b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/glyptodon/guacamole/auth/jdbc/user/ModeledUser.java
@@ -23,7 +23,10 @@
 package org.glyptodon.guacamole.auth.jdbc.user;
 
 import com.google.inject.Inject;
+import java.util.Arrays;
+import java.util.Collection;
 import java.util.Collections;
+import java.util.HashMap;
 import java.util.Map;
 import org.glyptodon.guacamole.auth.jdbc.base.ModeledDirectoryObject;
 import org.glyptodon.guacamole.auth.jdbc.security.PasswordEncryptionService;
@@ -34,6 +37,7 @@ import org.glyptodon.guacamole.auth.jdbc.activeconnection.ActiveConnectionPermis
 import org.glyptodon.guacamole.auth.jdbc.permission.ConnectionGroupPermissionService;
 import org.glyptodon.guacamole.auth.jdbc.permission.ConnectionPermissionService;
 import org.glyptodon.guacamole.auth.jdbc.permission.UserPermissionService;
+import org.glyptodon.guacamole.form.Field;
 import org.glyptodon.guacamole.net.auth.User;
 import org.glyptodon.guacamole.net.auth.permission.ObjectPermissionSet;
 import org.glyptodon.guacamole.net.auth.permission.SystemPermission;
@@ -47,6 +51,24 @@ import org.glyptodon.guacamole.net.auth.permission.SystemPermissionSet;
  */
 public class ModeledUser extends ModeledDirectoryObject<UserModel> implements User {
 
+    /**
+     * The name of the attribute which controls whether a user account is
+     * disabled.
+     */
+    public static final String DISABLED_ATTRIBUTE_NAME = "disabled";
+
+    /**
+     * A typed field corresponding to the disabled attribute of a user.
+     */
+    public static final Field DISABLED_ATTRIBUTE = new Field(DISABLED_ATTRIBUTE_NAME, "Disabled", "true");
+
+    /**
+     * All possible attributes of user objects.
+     */
+    public static final Collection<Field> ATTRIBUTES = Collections.unmodifiableCollection(Arrays.asList(
+        DISABLED_ATTRIBUTE
+    ));
+
     /**
      * Service for hashing passwords.
      */
@@ -183,12 +205,21 @@ public class ModeledUser extends ModeledDirectoryObject<UserModel> implements Us
 
     @Override
     public Map<String, String> getAttributes() {
-        return Collections.<String, String>emptyMap();
+
+        Map<String, String> attributes = new HashMap<String, String>();
+
+        // Set disabled attribute
+        attributes.put("disabled", getModel().isDisabled() ? "true" : null);
+
+        return attributes;
     }
 
     @Override
     public void setAttributes(Map<String, String> attributes) {
-        // Drop all attributes - none currently supported
+
+        // Translate disabled attribute
+        getModel().setDisabled("true".equals(attributes.get("disabled")));
+
     }
 
 }
diff --git a/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/glyptodon/guacamole/auth/jdbc/user/UserContext.java b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/glyptodon/guacamole/auth/jdbc/user/UserContext.java
index 00f7150f7..3ff9280fa 100644
--- a/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/glyptodon/guacamole/auth/jdbc/user/UserContext.java
+++ b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/glyptodon/guacamole/auth/jdbc/user/UserContext.java
@@ -135,7 +135,7 @@ public class UserContext extends RestrictedObject
 
     @Override
     public Collection<Field> getUserAttributes() {
-        return Collections.<Field>emptyList();
+        return ModeledUser.ATTRIBUTES;
     }
 
     @Override
diff --git a/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/glyptodon/guacamole/auth/jdbc/user/UserContextService.java b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/glyptodon/guacamole/auth/jdbc/user/UserContextService.java
index c0a31074f..589edd149 100644
--- a/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/glyptodon/guacamole/auth/jdbc/user/UserContextService.java
+++ b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/glyptodon/guacamole/auth/jdbc/user/UserContextService.java
@@ -67,7 +67,7 @@ public class UserContextService  {
 
         // Authenticate user
         ModeledUser user = userService.retrieveUser(credentials);
-        if (user != null) {
+        if (user != null && !user.getModel().isDisabled()) {
 
             // Upon successful authentication, return new user context
             UserContext context = userContextProvider.get();
diff --git a/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/glyptodon/guacamole/auth/jdbc/user/UserModel.java b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/glyptodon/guacamole/auth/jdbc/user/UserModel.java
index 546b1927a..1f84ab566 100644
--- a/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/glyptodon/guacamole/auth/jdbc/user/UserModel.java
+++ b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/glyptodon/guacamole/auth/jdbc/user/UserModel.java
@@ -42,6 +42,12 @@ public class UserModel extends ObjectModel {
      */
     private byte[] passwordSalt;
 
+    /**
+     * Whether the user account is disabled. Disabled accounts exist and can
+     * be modified, but cannot be used.
+     */
+    private boolean disabled;
+
     /**
      * Creates a new, empty user.
      */
@@ -97,4 +103,28 @@ public class UserModel extends ObjectModel {
         this.passwordSalt = passwordSalt;
     }
 
+    /**
+     * Returns whether the user has been disabled. Disabled users are not
+     * allowed to login. Although their account data exists, all login attempts
+     * will fail as if the account does not exist.
+     *
+     * @return
+     *     true if the account is disabled, false otherwise.
+     */
+    public boolean isDisabled() {
+        return disabled;
+    }
+
+    /**
+     * Sets whether the user is disabled. Disabled users are not allowed to
+     * login. Although their account data exists, all login attempts will fail
+     * as if the account does not exist.
+     *
+     * @param disabled
+     *     true if the account should be disabled, false otherwise.
+     */
+    public void setDisabled(boolean disabled) {
+        this.disabled = disabled;
+    }
+
 }
diff --git a/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/resources/translations/en_US.json b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/resources/translations/en_US.json
new file mode 100644
index 000000000..2937a9713
--- /dev/null
+++ b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/resources/translations/en_US.json
@@ -0,0 +1,5 @@
+{
+    "USER_ATTRIBUTES" : {
+        "FIELD_HEADER_DISABLED" : "Disabled:"
+    }
+}
diff --git a/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/schema/001-create-schema.sql b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/schema/001-create-schema.sql
index 0a50bb379..e9545adae 100644
--- a/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/schema/001-create-schema.sql
+++ b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/schema/001-create-schema.sql
@@ -76,6 +76,7 @@ CREATE TABLE `guacamole_user` (
   `username`      varchar(128) NOT NULL,
   `password_hash` binary(32)   NOT NULL,
   `password_salt` binary(32),
+  `disabled`      boolean      NOT NULL DEFAULT 0,
 
   PRIMARY KEY (`user_id`),
   UNIQUE KEY `username` (`username`)
diff --git a/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/schema/upgrade/upgrade-pre-0.9.7.sql b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/schema/upgrade/upgrade-pre-0.9.7.sql
new file mode 100644
index 000000000..8bc41ec26
--- /dev/null
+++ b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/schema/upgrade/upgrade-pre-0.9.7.sql
@@ -0,0 +1,28 @@
+--
+-- Copyright (C) 2015 Glyptodon LLC
+--
+-- Permission is hereby granted, free of charge, to any person obtaining a copy
+-- of this software and associated documentation files (the "Software"), to deal
+-- in the Software without restriction, including without limitation the rights
+-- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+-- copies of the Software, and to permit persons to whom the Software is
+-- furnished to do so, subject to the following conditions:
+--
+-- The above copyright notice and this permission notice shall be included in
+-- all copies or substantial portions of the Software.
+--
+-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+-- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+-- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+-- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+-- THE SOFTWARE.
+--
+
+--
+-- Add per-user disable flag
+--
+
+ALTER TABLE guacamole_user ADD COLUMN disabled BOOLEAN NOT NULL DEFAULT 0;
+
diff --git a/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/src/main/resources/guac-manifest.json b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/src/main/resources/guac-manifest.json
index 3c7deb865..6566bcc4b 100644
--- a/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/src/main/resources/guac-manifest.json
+++ b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/src/main/resources/guac-manifest.json
@@ -7,6 +7,10 @@
 
     "authProviders" : [
         "net.sourceforge.guacamole.net.auth.mysql.MySQLAuthenticationProvider"
+    ],
+
+    "translations" : [
+        "translations/en_US.json"
     ]
 
 }
diff --git a/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/src/main/resources/org/glyptodon/guacamole/auth/jdbc/user/UserMapper.xml b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/src/main/resources/org/glyptodon/guacamole/auth/jdbc/user/UserMapper.xml
index 7c5b7357f..de4b311cd 100644
--- a/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/src/main/resources/org/glyptodon/guacamole/auth/jdbc/user/UserMapper.xml
+++ b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/src/main/resources/org/glyptodon/guacamole/auth/jdbc/user/UserMapper.xml
@@ -32,6 +32,7 @@
         <result column="username"      property="identifier"   jdbcType="VARCHAR"/>
         <result column="password_hash" property="passwordHash" jdbcType="BINARY"/>
         <result column="password_salt" property="passwordSalt" jdbcType="BINARY"/>
+        <result column="disabled"      property="disabled"     jdbcType="BOOLEAN"/>
     </resultMap>
 
     <!-- Select all usernames -->
@@ -57,7 +58,8 @@
             user_id,
             username,
             password_hash,
-            password_salt
+            password_salt,
+            disabled
         FROM guacamole_user
         WHERE username IN
             <foreach collection="identifiers" item="identifier"
@@ -74,7 +76,8 @@
             guacamole_user.user_id,
             username,
             password_hash,
-            password_salt
+            password_salt,
+            disabled
         FROM guacamole_user
         JOIN guacamole_user_permission ON affected_user_id = guacamole_user.user_id
         WHERE username IN
@@ -94,7 +97,8 @@
             user_id,
             username,
             password_hash,
-            password_salt
+            password_salt,
+            disabled
         FROM guacamole_user
         WHERE
             username = #{username,jdbcType=VARCHAR}
@@ -114,12 +118,14 @@
         INSERT INTO guacamole_user (
             username,
             password_hash,
-            password_salt
+            password_salt,
+            disabled
         )
         VALUES (
             #{object.identifier,jdbcType=VARCHAR},
             #{object.passwordHash,jdbcType=BINARY},
-            #{object.passwordSalt,jdbcType=BINARY}
+            #{object.passwordSalt,jdbcType=BINARY},
+            #{object.disabled,jdbcType=BOOLEAN}
         )
 
     </insert>
@@ -128,7 +134,8 @@
     <update id="update" parameterType="org.glyptodon.guacamole.auth.jdbc.user.UserModel">
         UPDATE guacamole_user
         SET password_hash = #{object.passwordHash,jdbcType=BINARY},
-            password_salt = #{object.passwordSalt,jdbcType=BINARY}
+            password_salt = #{object.passwordSalt,jdbcType=BINARY},
+            disabled = #{object.disabled,jdbcType=BOOLEAN}
         WHERE user_id = #{object.objectID,jdbcType=VARCHAR}
     </update>
 
diff --git a/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-postgresql/schema/001-create-schema.sql b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-postgresql/schema/001-create-schema.sql
index 4e4297693..d228b5844 100644
--- a/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-postgresql/schema/001-create-schema.sql
+++ b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-postgresql/schema/001-create-schema.sql
@@ -117,6 +117,7 @@ CREATE TABLE guacamole_user (
   username      varchar(128) NOT NULL,
   password_hash bytea        NOT NULL,
   password_salt bytea,
+  disabled      boolean      NOT NULL DEFAULT FALSE,
 
   PRIMARY KEY (user_id),
 
diff --git a/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-postgresql/schema/upgrade/upgrade-pre-0.9.7.sql b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-postgresql/schema/upgrade/upgrade-pre-0.9.7.sql
new file mode 100644
index 000000000..ba8649629
--- /dev/null
+++ b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-postgresql/schema/upgrade/upgrade-pre-0.9.7.sql
@@ -0,0 +1,28 @@
+--
+-- Copyright (C) 2015 Glyptodon LLC
+--
+-- Permission is hereby granted, free of charge, to any person obtaining a copy
+-- of this software and associated documentation files (the "Software"), to deal
+-- in the Software without restriction, including without limitation the rights
+-- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+-- copies of the Software, and to permit persons to whom the Software is
+-- furnished to do so, subject to the following conditions:
+--
+-- The above copyright notice and this permission notice shall be included in
+-- all copies or substantial portions of the Software.
+--
+-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+-- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+-- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+-- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+-- THE SOFTWARE.
+--
+
+--
+-- Add per-user disable flag
+--
+
+ALTER TABLE guacamole_user ADD COLUMN disabled boolean NOT NULL DEFAULT FALSE;
+
diff --git a/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-postgresql/src/main/resources/guac-manifest.json b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-postgresql/src/main/resources/guac-manifest.json
index 2be870f25..a3ae33e4e 100644
--- a/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-postgresql/src/main/resources/guac-manifest.json
+++ b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-postgresql/src/main/resources/guac-manifest.json
@@ -7,6 +7,10 @@
 
     "authProviders" : [
         "org.glyptodon.guacamole.auth.postgresql.PostgreSQLAuthenticationProvider"
+    ],
+
+    "translations" : [
+        "translations/en_US.json"
     ]
 
 }
diff --git a/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-postgresql/src/main/resources/org/glyptodon/guacamole/auth/jdbc/user/UserMapper.xml b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-postgresql/src/main/resources/org/glyptodon/guacamole/auth/jdbc/user/UserMapper.xml
index 41416f7db..6b2438229 100644
--- a/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-postgresql/src/main/resources/org/glyptodon/guacamole/auth/jdbc/user/UserMapper.xml
+++ b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-postgresql/src/main/resources/org/glyptodon/guacamole/auth/jdbc/user/UserMapper.xml
@@ -32,6 +32,7 @@
         <result column="username"      property="identifier"   jdbcType="VARCHAR"/>
         <result column="password_hash" property="passwordHash" jdbcType="BINARY"/>
         <result column="password_salt" property="passwordSalt" jdbcType="BINARY"/>
+        <result column="disabled"      property="disabled"     jdbcType="BOOLEAN"/>
     </resultMap>
 
     <!-- Select all usernames -->
@@ -57,7 +58,8 @@
             user_id,
             username,
             password_hash,
-            password_salt
+            password_salt,
+            disabled
         FROM guacamole_user
         WHERE username IN
             <foreach collection="identifiers" item="identifier"
@@ -74,7 +76,8 @@
             guacamole_user.user_id,
             username,
             password_hash,
-            password_salt
+            password_salt,
+            disabled
         FROM guacamole_user
         JOIN guacamole_user_permission ON affected_user_id = guacamole_user.user_id
         WHERE username IN
@@ -94,7 +97,8 @@
             user_id,
             username,
             password_hash,
-            password_salt
+            password_salt,
+            disabled
         FROM guacamole_user
         WHERE
             username = #{username,jdbcType=VARCHAR}
@@ -114,12 +118,14 @@
         INSERT INTO guacamole_user (
             username,
             password_hash,
-            password_salt
+            password_salt,
+            disabled
         )
         VALUES (
             #{object.identifier,jdbcType=VARCHAR},
             #{object.passwordHash,jdbcType=BINARY},
-            #{object.passwordSalt,jdbcType=BINARY}
+            #{object.passwordSalt,jdbcType=BINARY},
+            #{object.disabled,jdbcType=BOOLEAN}
         )
 
     </insert>
@@ -128,7 +134,8 @@
     <update id="update" parameterType="org.glyptodon.guacamole.auth.jdbc.user.UserModel">
         UPDATE guacamole_user
         SET password_hash = #{object.passwordHash,jdbcType=BINARY},
-            password_salt = #{object.passwordSalt,jdbcType=BINARY}
+            password_salt = #{object.passwordSalt,jdbcType=BINARY},
+            disabled = #{object.disabled,jdbcType=BOOLEAN}
         WHERE user_id = #{object.objectID,jdbcType=VARCHAR}
     </update>