diff --git a/data/bash-completion/fwupdmgr.in b/data/bash-completion/fwupdmgr.in
index ccdd89c55..623a75917 100644
--- a/data/bash-completion/fwupdmgr.in
+++ b/data/bash-completion/fwupdmgr.in
@@ -1,5 +1,6 @@
 _fwupdmgr_cmd_list=(
 	'activate'
+	'block-firmware'
 	'clear-history'
 	'clear-offline'
 	'clear-results'
@@ -7,6 +8,7 @@ _fwupdmgr_cmd_list=(
 	'downgrade'
 	'enable-remote'
 	'get-approved-firmware'
+	'get-blocked-firmware'
 	'get-details'
 	'get-devices'
 	'get-history'
@@ -25,6 +27,7 @@ _fwupdmgr_cmd_list=(
 	'security'
 	'set-approved-firmware'
 	'unlock'
+	'unblock-firmware'
 	'update'
 	'upgrade'
 	'verify'
diff --git a/data/daemon.conf b/data/daemon.conf
index 93777595c..6a576cfd5 100644
--- a/data/daemon.conf
+++ b/data/daemon.conf
@@ -32,3 +32,7 @@ EnumerateAllDevices=false
 # A list of firmware checksums that has been approved by the site admin
 # If unset, all firmware is approved
 ApprovedFirmware=
+
+# Allow blocking specific devices by their checksum, either SHA1 or SHA256
+# Uses semicolons as delimiter
+BlockedFirmware=
diff --git a/libfwupd/fwupd-client.c b/libfwupd/fwupd-client.c
index eef46d0d9..bf96ec381 100644
--- a/libfwupd/fwupd-client.c
+++ b/libfwupd/fwupd-client.c
@@ -2128,6 +2128,98 @@ fwupd_client_set_approved_firmware (FwupdClient *client,
 	return TRUE;
 }
 
+/**
+ * fwupd_client_get_blocked_firmware:
+ * @client: A #FwupdClient
+ * @cancellable: the #GCancellable, or %NULL
+ * @error: the #GError, or %NULL
+ *
+ * Gets the list of blocked firmware.
+ *
+ * Returns: (transfer full): list of checksums, or %NULL
+ *
+ * Since: 1.4.6
+ **/
+gchar **
+fwupd_client_get_blocked_firmware (FwupdClient *client,
+				    GCancellable *cancellable,
+				    GError **error)
+{
+	FwupdClientPrivate *priv = GET_PRIVATE (client);
+	g_autoptr(GVariant) val = NULL;
+	gchar **retval = NULL;
+
+	g_return_val_if_fail (FWUPD_IS_CLIENT (client), NULL);
+	g_return_val_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable), NULL);
+	g_return_val_if_fail (error == NULL || *error == NULL, NULL);
+
+	/* connect */
+	if (!fwupd_client_connect (client, cancellable, error))
+		return NULL;
+
+	/* call into daemon */
+	val = g_dbus_proxy_call_sync (priv->proxy,
+				      "GetBlockedFirmware",
+				      NULL,
+				      G_DBUS_CALL_FLAGS_NONE,
+				      -1,
+				      cancellable,
+				      error);
+	if (val == NULL) {
+		if (error != NULL)
+			fwupd_client_fixup_dbus_error (*error);
+		return NULL;
+	}
+	g_variant_get (val, "(^as)", &retval);
+	return retval;
+}
+
+/**
+ * fwupd_client_set_blocked_firmware:
+ * @client: A #FwupdClient
+ * @checksums: Array of checksums
+ * @cancellable: the #GCancellable, or %NULL
+ * @error: the #GError, or %NULL
+ *
+ * Sets the list of blocked firmware.
+ *
+ * Returns: %TRUE for success
+ *
+ * Since: 1.4.6
+ **/
+gboolean
+fwupd_client_set_blocked_firmware (FwupdClient *client,
+				    gchar **checksums,
+				    GCancellable *cancellable,
+				    GError **error)
+{
+	FwupdClientPrivate *priv = GET_PRIVATE (client);
+	g_autoptr(GVariant) val = NULL;
+
+	g_return_val_if_fail (FWUPD_IS_CLIENT (client), FALSE);
+	g_return_val_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable), FALSE);
+	g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
+
+	/* connect */
+	if (!fwupd_client_connect (client, cancellable, error))
+		return FALSE;
+
+	/* call into daemon */
+	val = g_dbus_proxy_call_sync (priv->proxy,
+				      "SetBlockedFirmware",
+				      g_variant_new ("(^as)", checksums),
+				      G_DBUS_CALL_FLAGS_NONE,
+				      -1,
+				      cancellable,
+				      error);
+	if (val == NULL) {
+		if (error != NULL)
+			fwupd_client_fixup_dbus_error (*error);
+		return FALSE;
+	}
+	return TRUE;
+}
+
 /**
  * fwupd_client_set_feature_flags:
  * @client: A #FwupdClient
diff --git a/libfwupd/fwupd-client.h b/libfwupd/fwupd-client.h
index 43011c190..235568e68 100644
--- a/libfwupd/fwupd-client.h
+++ b/libfwupd/fwupd-client.h
@@ -205,6 +205,13 @@ gboolean	 fwupd_client_set_approved_firmware	(FwupdClient	*client,
 							 gchar		**checksums,
 							 GCancellable	*cancellable,
 							 GError		**error);
+gchar		**fwupd_client_get_blocked_firmware	(FwupdClient	*client,
+							 GCancellable	*cancellable,
+							 GError		**error);
+gboolean	 fwupd_client_set_blocked_firmware	(FwupdClient	*client,
+							 gchar		**checksums,
+							 GCancellable	*cancellable,
+							 GError		**error);
 gchar		*fwupd_client_self_sign			(FwupdClient	*client,
 							 const gchar	*value,
 							 FwupdSelfSignFlags flags,
diff --git a/libfwupd/fwupd.map b/libfwupd/fwupd.map
index a70b12756..1b669fe8a 100644
--- a/libfwupd/fwupd.map
+++ b/libfwupd/fwupd.map
@@ -469,6 +469,13 @@ LIBFWUPD_1.4.5 {
   local: *;
 } LIBFWUPD_1.4.1;
 
+LIBFWUPD_1.4.6 {
+  global:
+    fwupd_client_get_blocked_firmware;
+    fwupd_client_set_blocked_firmware;
+  local: *;
+} LIBFWUPD_1.4.5;
+
 LIBFWUPD_1.5.0 {
   global:
     fwupd_client_get_host_security_attrs;
@@ -508,4 +515,4 @@ LIBFWUPD_1.5.0 {
     fwupd_security_attr_to_string;
     fwupd_security_attr_to_variant;
   local: *;
-} LIBFWUPD_1.4.5;
+} LIBFWUPD_1.4.6;
diff --git a/src/fu-config.c b/src/fu-config.c
index b5bdf24ed..646940c03 100644
--- a/src/fu-config.c
+++ b/src/fu-config.c
@@ -30,6 +30,7 @@ struct _FuConfig
 	GPtrArray		*disabled_devices;	/* (element-type utf-8) */
 	GPtrArray		*disabled_plugins;	/* (element-type utf-8) */
 	GPtrArray		*approved_firmware;	/* (element-type utf-8) */
+	GPtrArray		*blocked_firmware;	/* (element-type utf-8) */
 	guint64			 archive_size_max;
 	guint			 idle_timeout;
 	gchar			*config_file;
@@ -52,6 +53,7 @@ fu_config_reload (FuConfig *self, GError **error)
 	guint64 archive_size_max;
 	guint idle_timeout;
 	g_auto(GStrv) approved_firmware = NULL;
+	g_auto(GStrv) blocked_firmware = NULL;
 	g_auto(GStrv) devices = NULL;
 	g_auto(GStrv) plugins = NULL;
 	g_autofree gchar *domains = NULL;
@@ -106,6 +108,20 @@ fu_config_reload (FuConfig *self, GError **error)
 		}
 	}
 
+	/* get blocked firmware */
+	g_ptr_array_set_size (self->blocked_firmware, 0);
+	blocked_firmware = g_key_file_get_string_list (keyfile,
+						       "fwupd",
+						       "BlockedFirmware",
+						       NULL, /* length */
+						       NULL);
+	if (blocked_firmware != NULL) {
+		for (guint i = 0; blocked_firmware[i] != NULL; i++) {
+			g_ptr_array_add (self->blocked_firmware,
+					 g_strdup (blocked_firmware[i]));
+		}
+	}
+
 	/* get maximum archive size, defaulting to something sane */
 	archive_size_max = g_key_file_get_uint64 (keyfile,
 						  "fwupd",
@@ -227,6 +243,13 @@ fu_config_get_disabled_devices (FuConfig *self)
 	return self->disabled_devices;
 }
 
+GPtrArray *
+fu_config_get_blocked_firmware (FuConfig *self)
+{
+	g_return_val_if_fail (FU_IS_CONFIG (self), NULL);
+	return self->blocked_firmware;
+}
+
 guint64
 fu_config_get_archive_size_max (FuConfig *self)
 {
@@ -282,6 +305,7 @@ fu_config_init (FuConfig *self)
 	self->disabled_devices = g_ptr_array_new_with_free_func (g_free);
 	self->disabled_plugins = g_ptr_array_new_with_free_func (g_free);
 	self->approved_firmware = g_ptr_array_new_with_free_func (g_free);
+	self->blocked_firmware = g_ptr_array_new_with_free_func (g_free);
 }
 
 static void
@@ -294,6 +318,7 @@ fu_config_finalize (GObject *obj)
 	g_ptr_array_unref (self->disabled_devices);
 	g_ptr_array_unref (self->disabled_plugins);
 	g_ptr_array_unref (self->approved_firmware);
+	g_ptr_array_unref (self->blocked_firmware);
 	g_free (self->config_file);
 
 	G_OBJECT_CLASS (fu_config_parent_class)->finalize (obj);
diff --git a/src/fu-config.h b/src/fu-config.h
index 72b2c28ab..6c8d6e340 100644
--- a/src/fu-config.h
+++ b/src/fu-config.h
@@ -26,5 +26,6 @@ guint		 fu_config_get_idle_timeout		(FuConfig	*self);
 GPtrArray	*fu_config_get_disabled_devices		(FuConfig	*self);
 GPtrArray	*fu_config_get_disabled_plugins		(FuConfig	*self);
 GPtrArray	*fu_config_get_approved_firmware	(FuConfig	*self);
+GPtrArray	*fu_config_get_blocked_firmware		(FuConfig	*self);
 gboolean	 fu_config_get_update_motd		(FuConfig	*self);
 gboolean	 fu_config_get_enumerate_all_devices	(FuConfig	*self);
diff --git a/src/fu-engine.c b/src/fu-engine.c
index d0f7c5975..a87a9ce22 100644
--- a/src/fu-engine.c
+++ b/src/fu-engine.c
@@ -103,6 +103,7 @@ struct _FuEngine
 	GHashTable		*runtime_versions;
 	GHashTable		*compile_versions;
 	GHashTable		*approved_firmware;	/* (nullable) */
+	GHashTable		*blocked_firmware;	/* (nullable) */
 	GHashTable		*firmware_gtypes;
 	gchar			*host_machine_id;
 	JcatContext		*jcat_context;
@@ -527,6 +528,7 @@ fu_engine_modify_config (FuEngine *self, const gchar *key, const gchar *value, G
 	const gchar *keys[] = {
 		"ArchiveSizeMax",
 		"DisabledDevices",
+		"BlockedFirmware",
 		"DisabledPlugins",
 		"IdleTimeout",
 		"VerboseDomains",
@@ -4178,6 +4180,21 @@ fu_engine_check_release_is_approved (FuEngine *self, FwupdRelease *rel)
 	return FALSE;
 }
 
+static gboolean
+fu_engine_check_release_is_blocked (FuEngine *self, FwupdRelease *rel)
+{
+	GPtrArray *csums = fwupd_release_get_checksums (rel);
+	if (self->blocked_firmware == NULL)
+		return FALSE;
+	for (guint i = 0; i < csums->len; i++) {
+		const gchar *csum = g_ptr_array_index (csums, i);
+		g_debug ("checking %s against blocked list", csum);
+		if (g_hash_table_lookup (self->blocked_firmware, csum) != NULL)
+			return TRUE;
+	}
+	return FALSE;
+}
+
 static gboolean
 fu_engine_add_releases_for_device_component (FuEngine *self,
 					     FuEngineRequest *request,
@@ -4258,6 +4275,10 @@ fu_engine_add_releases_for_device_component (FuEngine *self,
 			fwupd_release_add_flag (rel, FWUPD_RELEASE_FLAG_BLOCKED_VERSION);
 		}
 
+		/* manually blocked */
+		if (fu_engine_check_release_is_blocked (self, rel))
+			fwupd_release_add_flag (rel, FWUPD_RELEASE_FLAG_BLOCKED_APPROVAL);
+
 		/* check if remote is filtering firmware */
 		remote_id = fwupd_release_get_remote_id (rel);
 		if (remote_id != NULL) {
@@ -4545,6 +4566,56 @@ fu_engine_add_approved_firmware (FuEngine *self, const gchar *checksum)
 	g_hash_table_add (self->approved_firmware, g_strdup (checksum));
 }
 
+GPtrArray *
+fu_engine_get_blocked_firmware (FuEngine *self)
+{
+	GPtrArray *checksums = g_ptr_array_new_with_free_func (g_free);
+	if (self->blocked_firmware != NULL) {
+		g_autoptr(GList) keys = g_hash_table_get_keys (self->blocked_firmware);
+		for (GList *l = keys; l != NULL; l = l->next) {
+			const gchar *csum = l->data;
+			g_ptr_array_add (checksums, g_strdup (csum));
+		}
+	}
+	return checksums;
+}
+
+void
+fu_engine_add_blocked_firmware (FuEngine *self, const gchar *checksum)
+{
+	if (self->blocked_firmware == NULL) {
+		self->blocked_firmware = g_hash_table_new_full (g_str_hash,
+								g_str_equal,
+								g_free,
+								NULL);
+	}
+	g_hash_table_add (self->blocked_firmware, g_strdup (checksum));
+}
+
+gboolean
+fu_engine_set_blocked_firmware (FuEngine *self, GPtrArray *checksums, GError **error)
+{
+	/* update in-memory hash */
+	if (self->blocked_firmware != NULL) {
+		g_hash_table_unref (self->blocked_firmware);
+		self->blocked_firmware = NULL;
+	}
+	for (guint i = 0; i < checksums->len; i++) {
+		const gchar *csum = g_ptr_array_index (checksums, i);
+		fu_engine_add_blocked_firmware (self, csum);
+	}
+
+	/* save database */
+	if (!fu_history_clear_blocked_firmware (self->history, error))
+		return FALSE;
+	for (guint i = 0; i < checksums->len; i++) {
+		const gchar *csum = g_ptr_array_index (checksums, i);
+		if (!fu_history_add_blocked_firmware (self->history, csum, error))
+			return FALSE;
+	}
+	return TRUE;
+}
+
 gchar *
 fu_engine_self_sign (FuEngine *self,
 		     const gchar *value,
@@ -6123,7 +6194,8 @@ fu_engine_load (FuEngine *self, FuEngineLoadFlags flags, GError **error)
 {
 	FuRemoteListLoadFlags remote_list_flags = FU_REMOTE_LIST_LOAD_FLAG_NONE;
 	FuQuirksLoadFlags quirks_flags = FU_QUIRKS_LOAD_FLAG_NONE;
-	g_autoptr(GPtrArray) checksums = NULL;
+	g_autoptr(GPtrArray) checksums_approved = NULL;
+	g_autoptr(GPtrArray) checksums_blocked = NULL;
 #ifndef _WIN32
 	g_autoptr(GError) error_local = NULL;
 #endif
@@ -6159,21 +6231,33 @@ fu_engine_load (FuEngine *self, FuEngineLoadFlags flags, GError **error)
 	/* create client certificate */
 	fu_engine_ensure_client_certificate (self);
 
-	/* get hardcoded approved firmware */
-	checksums = fu_config_get_approved_firmware (self->config);
-	for (guint i = 0; i < checksums->len; i++) {
-		const gchar *csum = g_ptr_array_index (checksums, i);
+	/* get hardcoded approved and blocked firmware */
+	checksums_approved = fu_config_get_approved_firmware (self->config);
+	for (guint i = 0; i < checksums_approved->len; i++) {
+		const gchar *csum = g_ptr_array_index (checksums_approved, i);
 		fu_engine_add_approved_firmware (self, csum);
 	}
+	checksums_blocked = fu_config_get_blocked_firmware (self->config);
+	for (guint i = 0; i < checksums_blocked->len; i++) {
+		const gchar *csum = g_ptr_array_index (checksums_blocked, i);
+		fu_engine_add_blocked_firmware (self, csum);
+	}
 
 	/* get extra firmware saved to the database */
-	checksums = fu_history_get_approved_firmware (self->history, error);
-	if (checksums == NULL)
+	checksums_approved = fu_history_get_approved_firmware (self->history, error);
+	if (checksums_approved == NULL)
 		return FALSE;
-	for (guint i = 0; i < checksums->len; i++) {
-		const gchar *csum = g_ptr_array_index (checksums, i);
+	for (guint i = 0; i < checksums_approved->len; i++) {
+		const gchar *csum = g_ptr_array_index (checksums_approved, i);
 		fu_engine_add_approved_firmware (self, csum);
 	}
+	checksums_blocked = fu_history_get_blocked_firmware (self->history, error);
+	if (checksums_blocked == NULL)
+		return FALSE;
+	for (guint i = 0; i < checksums_blocked->len; i++) {
+		const gchar *csum = g_ptr_array_index (checksums_blocked, i);
+		fu_engine_add_blocked_firmware (self, csum);
+	}
 
 	/* set up idle exit */
 	if ((self->app_flags & FU_APP_FLAGS_NO_IDLE_SOURCES) == 0)
@@ -6446,6 +6530,8 @@ fu_engine_finalize (GObject *obj)
 		g_source_remove (self->coldplug_id);
 	if (self->approved_firmware != NULL)
 		g_hash_table_unref (self->approved_firmware);
+	if (self->blocked_firmware != NULL)
+		g_hash_table_unref (self->blocked_firmware);
 
 	g_free (self->host_machine_id);
 	g_free (self->host_security_id);
diff --git a/src/fu-engine.h b/src/fu-engine.h
index eaad096e8..08462198b 100644
--- a/src/fu-engine.h
+++ b/src/fu-engine.h
@@ -159,6 +159,14 @@ gboolean	 fu_engine_activate			(FuEngine	*self,
 GPtrArray	*fu_engine_get_approved_firmware	(FuEngine	*self);
 void		 fu_engine_add_approved_firmware	(FuEngine	*self,
 							 const gchar	*checksum);
+void		 fu_engine_set_approved_firmware	(FuEngine	*self,
+							 GPtrArray	*checksums);
+GPtrArray	*fu_engine_get_blocked_firmware		(FuEngine	*self);
+void		 fu_engine_add_blocked_firmware		(FuEngine	*self,
+							 const gchar	*checksum);
+gboolean	 fu_engine_set_blocked_firmware		(FuEngine	*self,
+							 GPtrArray	*checksums,
+							 GError		**error);
 gchar		*fu_engine_self_sign			(FuEngine	*self,
 							 const gchar	*value,
 							 JcatSignFlags flags,
diff --git a/src/fu-history.c b/src/fu-history.c
index 96db6bd91..6de1970d5 100644
--- a/src/fu-history.c
+++ b/src/fu-history.c
@@ -20,7 +20,7 @@
 #include "fu-history.h"
 #include "fu-mutex.h"
 
-#define FU_HISTORY_CURRENT_SCHEMA_VERSION	5
+#define FU_HISTORY_CURRENT_SCHEMA_VERSION	6
 
 static void fu_history_finalize			 (GObject *object);
 
@@ -181,6 +181,8 @@ fu_history_create_database (FuHistory *self, GError **error)
 			 "protocol TEXT DEFAULT NULL);"
 			 "CREATE TABLE IF NOT EXISTS approved_firmware ("
 			 "checksum TEXT);"
+			 "CREATE TABLE IF NOT EXISTS blocked_firmware ("
+			 "checksum TEXT);"
 			 "COMMIT;", NULL, NULL, NULL);
 	if (rc != SQLITE_OK) {
 		g_set_error (error, FWUPD_ERROR, FWUPD_ERROR_INTERNAL,
@@ -269,6 +271,22 @@ fu_history_migrate_database_v4 (FuHistory *self, GError **error)
 	return TRUE;
 }
 
+static gboolean
+fu_history_migrate_database_v5 (FuHistory *self, GError **error)
+{
+	gint rc;
+	rc = sqlite3_exec (self->db,
+			   "CREATE TABLE IF NOT EXISTS blocked_firmware (checksum TEXT);",
+			   NULL, NULL, NULL);
+	if (rc != SQLITE_OK) {
+		g_set_error (error, FWUPD_ERROR, FWUPD_ERROR_INTERNAL,
+			     "Failed to create table: %s",
+			     sqlite3_errmsg (self->db));
+		return FALSE;
+	}
+	return TRUE;
+}
+
 /* returns 0 if database is not initialised */
 static guint
 fu_history_get_schema_version (FuHistory *self)
@@ -315,16 +333,26 @@ fu_history_create_or_migrate (FuHistory *self, guint schema_ver, GError **error)
 			return FALSE;
 		if (!fu_history_migrate_database_v4 (self, error))
 			return FALSE;
+		if (!fu_history_migrate_database_v5 (self, error))
+			return FALSE;
 	} else if (schema_ver == 3) {
 		g_debug ("migrating v%u database by altering", schema_ver);
 		if (!fu_history_migrate_database_v3 (self, error))
 			return FALSE;
 		if (!fu_history_migrate_database_v4 (self, error))
 			return FALSE;
+		if (!fu_history_migrate_database_v5 (self, error))
+			return FALSE;
 	} else if (schema_ver == 4) {
 		g_debug ("migrating v%u database by altering", schema_ver);
 		if (!fu_history_migrate_database_v4 (self, error))
 			return FALSE;
+		if (!fu_history_migrate_database_v5 (self, error))
+			return FALSE;
+	} else if (schema_ver == 5) {
+		g_debug ("migrating v%u database by altering", schema_ver);
+		if (!fu_history_migrate_database_v5 (self, error))
+			return FALSE;
 	} else {
 		/* this is probably okay, but return an error if we ever delete
 		 * or rename columns */
@@ -1066,6 +1094,139 @@ fu_history_add_approved_firmware (FuHistory *self,
 	sqlite3_bind_text (stmt, 1, checksum, -1, SQLITE_STATIC);
 	return fu_history_stmt_exec (self, stmt, NULL, error);
 }
+/**
+ * fu_history_get_blocked_firmware:
+ * @self: A #FuHistory
+ * @error: A #GError or NULL
+ *
+ * Returns blocked firmware records.
+ *
+ * Returns: (transfer full) (element-type gchar *): records
+ *
+ * Since: 1.4.6
+ **/
+GPtrArray *
+fu_history_get_blocked_firmware (FuHistory *self, GError **error)
+{
+	gint rc;
+	g_autoptr(GRWLockReaderLocker) locker = NULL;
+	g_autoptr(GPtrArray) array = NULL;
+	g_autoptr(sqlite3_stmt) stmt = NULL;
+
+	g_return_val_if_fail (FU_IS_HISTORY (self), NULL);
+
+	/* lazy load */
+	if (self->db == NULL) {
+		if (!fu_history_load (self, error))
+			return NULL;
+	}
+
+	/* get all the blocked firmware */
+	locker = g_rw_lock_reader_locker_new (&self->db_mutex);
+	g_return_val_if_fail (locker != NULL, NULL);
+	rc = sqlite3_prepare_v2 (self->db,
+				 "SELECT checksum FROM blocked_firmware;",
+				 -1, &stmt, NULL);
+	if (rc != SQLITE_OK) {
+		g_set_error (error, FWUPD_ERROR, FWUPD_ERROR_INTERNAL,
+			     "Failed to prepare SQL to get checksum: %s",
+			     sqlite3_errmsg (self->db));
+		return NULL;
+	}
+	array = g_ptr_array_new_with_free_func (g_free);
+	while ((rc = sqlite3_step (stmt)) == SQLITE_ROW) {
+		const gchar *tmp = (const gchar *) sqlite3_column_text (stmt, 0);
+		g_ptr_array_add (array, g_strdup (tmp));
+	}
+	if (rc != SQLITE_DONE) {
+		g_set_error (error, FWUPD_ERROR, FWUPD_ERROR_WRITE,
+			     "failed to execute prepared statement: %s",
+			     sqlite3_errmsg (self->db));
+		return NULL;
+	}
+	return g_steal_pointer (&array);
+}
+
+/**
+ * fu_history_clear_blocked_firmware:
+ * @self: A #FuHistory
+ * @error: A #GError or NULL
+ *
+ * Clear all blocked firmware records
+ *
+ * Returns: #TRUE for success, #FALSE for failure
+ *
+ * Since: 1.4.6
+ **/
+gboolean
+fu_history_clear_blocked_firmware (FuHistory *self, GError **error)
+{
+	gint rc;
+	g_autoptr(sqlite3_stmt) stmt = NULL;
+	g_autoptr(GRWLockWriterLocker) locker = NULL;
+
+	g_return_val_if_fail (FU_IS_HISTORY (self), FALSE);
+
+	/* lazy load */
+	if (!fu_history_load (self, error))
+		return FALSE;
+
+	/* remove entries */
+	locker = g_rw_lock_writer_locker_new (&self->db_mutex);
+	g_return_val_if_fail (locker != NULL, FALSE);
+	rc = sqlite3_prepare_v2 (self->db,
+				 "DELETE FROM blocked_firmware;",
+				 -1, &stmt, NULL);
+	if (rc != SQLITE_OK) {
+		g_set_error (error, FWUPD_ERROR, FWUPD_ERROR_INTERNAL,
+			     "Failed to prepare SQL to delete blocked firmware: %s",
+			     sqlite3_errmsg (self->db));
+		return FALSE;
+	}
+	return fu_history_stmt_exec (self, stmt, NULL, error);
+}
+
+/**
+ * fu_history_add_blocked_firmware:
+ * @self: A #FuHistory
+ * @checksum: a string
+ * @error: A #GError or NULL
+ *
+ * Add an blocked firmware record to the database
+ *
+ * Returns: #TRUE for success, #FALSE for failure
+ *
+ * Since: 1.4.6
+ **/
+gboolean
+fu_history_add_blocked_firmware (FuHistory *self, const gchar *checksum, GError **error)
+{
+	gint rc;
+	g_autoptr(sqlite3_stmt) stmt = NULL;
+	g_autoptr(GRWLockWriterLocker) locker = NULL;
+
+	g_return_val_if_fail (FU_IS_HISTORY (self), FALSE);
+	g_return_val_if_fail (checksum != NULL, FALSE);
+
+	/* lazy load */
+	if (!fu_history_load (self, error))
+		return FALSE;
+
+	/* add */
+	locker = g_rw_lock_writer_locker_new (&self->db_mutex);
+	g_return_val_if_fail (locker != NULL, FALSE);
+	rc = sqlite3_prepare_v2 (self->db,
+				 "INSERT INTO blocked_firmware (checksum) "
+				 "VALUES (?1)", -1, &stmt, NULL);
+	if (rc != SQLITE_OK) {
+		g_set_error (error, FWUPD_ERROR, FWUPD_ERROR_INTERNAL,
+			     "Failed to prepare SQL to insert checksum: %s",
+			     sqlite3_errmsg (self->db));
+		return FALSE;
+	}
+	sqlite3_bind_text (stmt, 1, checksum, -1, SQLITE_STATIC);
+	return fu_history_stmt_exec (self, stmt, NULL, error);
+}
 
 static void
 fu_history_class_init (FuHistoryClass *klass)
diff --git a/src/fu-history.h b/src/fu-history.h
index f5b92fa12..84e4ae935 100644
--- a/src/fu-history.h
+++ b/src/fu-history.h
@@ -47,3 +47,10 @@ gboolean	 fu_history_add_approved_firmware	(FuHistory	*self,
 							 GError		**error);
 GPtrArray	*fu_history_get_approved_firmware	(FuHistory	*self,
 							 GError		**error);
+gboolean	 fu_history_clear_blocked_firmware	(FuHistory	*self,
+							 GError		**error);
+gboolean	 fu_history_add_blocked_firmware	(FuHistory	*self,
+							 const gchar	*checksum,
+							 GError		**error);
+GPtrArray	*fu_history_get_blocked_firmware	(FuHistory	*self,
+							 GError		**error);
diff --git a/src/fu-main.c b/src/fu-main.c
index fe4e7316c..3f5cce94b 100644
--- a/src/fu-main.c
+++ b/src/fu-main.c
@@ -430,6 +430,30 @@ fu_main_authorize_set_approved_firmware_cb (GObject *source, GAsyncResult *res,
 	g_dbus_method_invocation_return_value (helper->invocation, NULL);
 }
 
+static void
+fu_main_authorize_set_blocked_firmware_cb (GObject *source, GAsyncResult *res, gpointer user_data)
+{
+	g_autoptr(FuMainAuthHelper) helper = (FuMainAuthHelper *) user_data;
+	g_autoptr(GError) error = NULL;
+	g_autoptr(PolkitAuthorizationResult) auth = NULL;
+
+	/* get result */
+	fu_main_set_status (helper->priv, FWUPD_STATUS_IDLE);
+	auth = polkit_authority_check_authorization_finish (POLKIT_AUTHORITY (source),
+							    res, &error);
+	if (!fu_main_authorization_is_valid (auth, &error)) {
+		g_dbus_method_invocation_return_gerror (helper->invocation, error);
+		return;
+	}
+
+	/* success */
+	if (!fu_engine_set_blocked_firmware (helper->priv->engine, helper->checksums, &error)) {
+		g_dbus_method_invocation_return_gerror (helper->invocation, error);
+		return;
+	}
+	g_dbus_method_invocation_return_value (helper->invocation, NULL);
+}
+
 static void
 fu_main_authorize_self_sign_cb (GObject *source, GAsyncResult *res, gpointer user_data)
 {
@@ -878,6 +902,19 @@ fu_main_daemon_method_call (GDBusConnection *connection, const gchar *sender,
 						       g_variant_new_tuple (&val, 1));
 		return;
 	}
+	if (g_strcmp0 (method_name, "GetBlockedFirmware") == 0) {
+		GVariantBuilder builder;
+		GPtrArray *checksums = fu_engine_get_blocked_firmware (priv->engine);
+		g_variant_builder_init (&builder, G_VARIANT_TYPE ("as"));
+		for (guint i = 0; i < checksums->len; i++) {
+			const gchar *checksum = g_ptr_array_index (checksums, i);
+			g_variant_builder_add_value (&builder, g_variant_new_string (checksum));
+		}
+		val = g_variant_builder_end (&builder);
+		g_dbus_method_invocation_return_value (invocation,
+						       g_variant_new_tuple (&val, 1));
+		return;
+	}
 	if (g_strcmp0 (method_name, "GetReportMetadata") == 0) {
 		GHashTableIter iter;
 		GVariantBuilder builder;
@@ -932,6 +969,35 @@ fu_main_daemon_method_call (GDBusConnection *connection, const gchar *sender,
 						      g_steal_pointer (&helper));
 		return;
 	}
+	if (g_strcmp0 (method_name, "SetBlockedFirmware") == 0) {
+		g_autofree gchar *checksums_str = NULL;
+		g_auto(GStrv) checksums = NULL;
+		g_autoptr(FuMainAuthHelper) helper = NULL;
+		g_autoptr(PolkitSubject) subject = NULL;
+
+		g_variant_get (parameters, "(^as)", &checksums);
+		checksums_str = g_strjoinv (",", checksums);
+		g_debug ("Called %s(%s)", method_name, checksums_str);
+
+		/* authenticate */
+		fu_main_set_status (priv, FWUPD_STATUS_WAITING_FOR_AUTH);
+		helper = g_new0 (FuMainAuthHelper, 1);
+		helper->priv = priv;
+		helper->request = g_steal_pointer (&request);
+		helper->invocation = g_object_ref (invocation);
+		helper->checksums = g_ptr_array_new_with_free_func (g_free);
+		for (guint i = 0; checksums[i] != NULL; i++)
+			g_ptr_array_add (helper->checksums, g_strdup (checksums[i]));
+		subject = polkit_system_bus_name_new (sender);
+		polkit_authority_check_authorization (priv->authority, subject,
+						      "org.freedesktop.fwupd.set-approved-firmware",
+						      NULL,
+						      POLKIT_CHECK_AUTHORIZATION_FLAGS_ALLOW_USER_INTERACTION,
+						      NULL,
+						      fu_main_authorize_set_blocked_firmware_cb,
+						      g_steal_pointer (&helper));
+		return;
+	}
 	if (g_strcmp0 (method_name, "SelfSign") == 0) {
 		GVariant *prop_value;
 		gchar *prop_key;
diff --git a/src/fu-util.c b/src/fu-util.c
index 11ae78fc2..bff5163a1 100644
--- a/src/fu-util.c
+++ b/src/fu-util.c
@@ -2311,6 +2311,162 @@ fu_util_check_polkit_actions (GError **error)
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(FuUtilPrivate, fu_util_private_free)
 #pragma clang diagnostic pop
 
+static gchar *
+fu_util_get_history_checksum (FuUtilPrivate *priv, GError **error)
+{
+	const gchar *csum;
+	g_autoptr(FwupdDevice) device = NULL;
+	g_autoptr(FwupdRelease) release = NULL;
+	g_autoptr(GPtrArray) devices = NULL;
+
+	devices = fwupd_client_get_history (priv->client, NULL, error);
+	if (devices == NULL)
+		return NULL;
+	device = fu_util_prompt_for_device (priv, devices, error);
+	if (device == NULL)
+		return NULL;
+	release = fu_util_prompt_for_release (priv, fwupd_device_get_releases (device), error);
+	if (release == NULL)
+		return NULL;
+	csum = fwupd_checksum_get_best (fwupd_release_get_checksums (release));
+	if (csum == NULL) {
+		g_set_error_literal (error,
+				     FWUPD_ERROR,
+				     FWUPD_ERROR_NOTHING_TO_DO,
+				     "No suitable checksums");
+		return NULL;
+	}
+	return g_strdup (csum);
+}
+
+static gboolean
+fu_util_block_firmware (FuUtilPrivate *priv, gchar **values, GError **error)
+{
+	guint idx = 0;
+	g_autofree gchar *csum = NULL;
+	g_auto(GStrv) csums_new = NULL;
+	g_auto(GStrv) csums = NULL;
+
+	/* get existing checksums */
+	csums = fwupd_client_get_blocked_firmware (priv->client, priv->cancellable, error);
+	if (csums == NULL)
+		return FALSE;
+
+	/* get new value */
+	if (g_strv_length (values) == 0) {
+		csum = fu_util_get_history_checksum (priv, error);
+		if (csum == NULL)
+			return FALSE;
+	} else {
+		csum = g_strdup (values[0]);
+	}
+
+	/* ensure it's not already there */
+	if (g_strv_contains ((const gchar * const *) csums, csum)) {
+		g_set_error_literal (error,
+				     FWUPD_ERROR,
+				     FWUPD_ERROR_NOTHING_TO_DO,
+				     /* TRANSLATORS: user selected something not possible */
+				     _("Firmware is already blocked"));
+		return FALSE;
+	}
+
+	/* TRANSLATORS: we will not offer this firmware to the user */
+	g_print ("%s %s\n", _("Blocking firmware:"), csum);
+
+	/* remove it from the new list */
+	csums_new = g_new0 (gchar *, g_strv_length (csums) + 2);
+	for (guint i = 0; csums[i] != NULL; i++) {
+		if (g_strcmp0 (csums[i], csum) != 0)
+			csums_new[idx++] = g_strdup (csums[i]);
+	}
+	csums_new[idx] = g_strdup (csum);
+	return fwupd_client_set_blocked_firmware (priv->client, csums_new,
+						  priv->cancellable, error);
+}
+
+static gboolean
+fu_util_unblock_firmware (FuUtilPrivate *priv, gchar **values, GError **error)
+{
+	guint idx = 0;
+	g_auto(GStrv) csums = NULL;
+	g_auto(GStrv) csums_new = NULL;
+	g_autofree gchar *csum = NULL;
+
+	/* get existing checksums */
+	csums = fwupd_client_get_blocked_firmware (priv->client, priv->cancellable, error);
+	if (csums == NULL)
+		return FALSE;
+
+	/* empty list */
+	if (g_strv_length (csums) == 0) {
+		g_set_error_literal (error,
+				     FWUPD_ERROR,
+				     FWUPD_ERROR_NOTHING_TO_DO,
+				     /* TRANSLATORS: nothing to show */
+				     _("There are no blocked firmware files"));
+		return FALSE;
+	}
+
+	/* get new value */
+	if (g_strv_length (values) == 0) {
+		csum = fu_util_get_history_checksum (priv, error);
+		if (csum == NULL)
+			return FALSE;
+	} else {
+		csum = g_strdup (values[0]);
+	}
+
+	/* ensure it's there */
+	if (!g_strv_contains ((const gchar * const *) csums, csum)) {
+		g_set_error_literal (error,
+				     FWUPD_ERROR,
+				     FWUPD_ERROR_NOTHING_TO_DO,
+				     /* TRANSLATORS: user selected something not possible */
+				     _("Firmware is not already blocked"));
+		return FALSE;
+	}
+
+	/* TRANSLATORS: we will not offer this firmware to the user */
+	g_print ("%s %s\n", _("Unblocking firmware:"), csum);
+
+	/* remove it from the new list */
+	csums_new = g_new0 (gchar *, g_strv_length (csums));
+	for (guint i = 0; csums[i] != NULL; i++) {
+		if (g_strcmp0 (csums[i], csum) != 0)
+			csums_new[idx++] = g_strdup (csums[i]);
+	}
+	return fwupd_client_set_blocked_firmware (priv->client, csums_new,
+						  priv->cancellable, error);
+}
+
+static gboolean
+fu_util_get_blocked_firmware (FuUtilPrivate *priv, gchar **values, GError **error)
+{
+	g_auto(GStrv) csums = NULL;
+
+	/* get checksums */
+	csums = fwupd_client_get_blocked_firmware (priv->client, priv->cancellable, error);
+	if (csums == NULL)
+		return FALSE;
+
+	/* empty list */
+	if (g_strv_length (csums) == 0) {
+		/* TRANSLATORS: nothing to show */
+		g_print ("%s\n", _("There are no blocked firmware files"));
+		return TRUE;
+	}
+
+	/* TRANSLATORS: there follows a list of hashes */
+	g_print ("%s\n", _("Blocked firmware files:"));
+	for (guint i = 0; csums[i] != NULL; i++) {
+		g_print ("%u.\t%s\n", i + 1, csums[i]);
+	}
+
+	/* success */
+	return TRUE;
+}
+
 int
 main (int argc, char *argv[])
 {
@@ -2557,6 +2713,24 @@ main (int argc, char *argv[])
 		     /* TRANSLATORS: command description */
 		     _("Gets the host security attributes."),
 		     fu_util_security);
+	fu_util_cmd_array_add (cmd_array,
+		     "block-firmware",
+		     "[CHECKSUM]",
+		     /* TRANSLATORS: command description */
+		     _("Blocks a specific firmware from being installed."),
+		     fu_util_block_firmware);
+	fu_util_cmd_array_add (cmd_array,
+		     "unblock-firmware",
+		     "[CHECKSUM]",
+		     /* TRANSLATORS: command description */
+		     _("Blocks a specific firmware from being installed."),
+		     fu_util_unblock_firmware);
+	fu_util_cmd_array_add (cmd_array,
+		     "get-blocked-firmware",
+		     NULL,
+		     /* TRANSLATORS: command description */
+		     _("Gets the list of blocked firmware."),
+		     fu_util_get_blocked_firmware);
 
 	/* do stuff on ctrl+c */
 	priv->cancellable = g_cancellable_new ();
diff --git a/src/org.freedesktop.fwupd.xml b/src/org.freedesktop.fwupd.xml
index 79904c793..6b0f7448e 100644
--- a/src/org.freedesktop.fwupd.xml
+++ b/src/org.freedesktop.fwupd.xml
@@ -489,6 +489,42 @@
       </arg>
     </method>
 
+    <!--***********************************************************-->
+    <method name='GetBlockedFirmware'>
+      <doc:doc>
+        <doc:description>
+          <doc:para>
+            Gets the list of blocked firmware.
+          </doc:para>
+        </doc:description>
+      </doc:doc>
+      <arg type='as' name='checksums' direction='out'>
+        <doc:doc>
+          <doc:summary>
+            <doc:para>The checksums of the archives</doc:para>
+          </doc:summary>
+        </doc:doc>
+      </arg>
+    </method>
+
+    <!--***********************************************************-->
+    <method name='SetBlockedFirmware'>
+      <doc:doc>
+        <doc:description>
+          <doc:para>
+            Sets the list of blocked firmware that can be applied to devices.
+          </doc:para>
+        </doc:description>
+      </doc:doc>
+      <arg type='as' name='checksums' direction='in'>
+        <doc:doc>
+          <doc:summary>
+            <doc:para>The checksums of the archives</doc:para>
+          </doc:summary>
+        </doc:doc>
+      </arg>
+    </method>
+
     <!--***********************************************************-->
     <method name='SetFeatureFlags'>
       <doc:doc>