diff --git a/packages/lib/plugin.js b/packages/lib/plugin.js
index 74a27960..a45bb7c9 100644
--- a/packages/lib/plugin.js
+++ b/packages/lib/plugin.js
@@ -329,6 +329,43 @@ class BaseMasterPlugin {
 	 */
 	onSlaveConnectionEvent(connection, event) { }
 
+	/**
+	 * Called when an avent on a control connection happens
+	 *
+	 * The event param may be one of connect, drop, resume and close and has
+	 * the following meaning:
+	 *
+	 * ##### connect
+	 *
+	 * Invoked when a new connection to the control has been established.
+	 *
+	 * ##### drop
+	 *
+	 * Invoked when a connection loss is detected between the master and a
+	 * control.  Plugins should respond to this event by throtteling
+	 * messages it is sending to the given control connection to an absolute
+	 * minimum.
+	 *
+	 * Messages sent over a dropped control connection will get queued up in
+	 * memory on the master and sent all in one go when the connection is
+	 * re-established again.
+	 *
+	 * ##### resume
+	 *
+	 * Invoked when a connection that had previously been dropped is
+	 * re-established.
+	 *
+	 * ##### close
+	 *
+	 * Invoked when the connection to the control has been closed.
+	 *
+	 * @param {module:master/master~ControlConnection} connection -
+	 *     The connection the event occured on.
+	 * @param {string} event - one of connect, drop, resume, and close.
+	 */
+	onControlConnectionEvent(connection, event) { }
+
+
 	/**
 	 * Called when a slave is preparing to disconnect from the master
 	 *
@@ -505,6 +542,42 @@ class BaseWebPlugin {
 	 * Called immediately after the class is instantiated.
 	 */
 	async init() { }
+
+	/**
+	 * Called when an event on the master connection happens
+	 *
+	 * The event param may be one of connect, drop, resume and close and has
+	 * the following meaning:
+	 *
+	 * ##### connect
+	 *
+	 * Invoked when a new connection to the master has been established.
+	 *
+	 * ##### drop
+	 *
+	 * Invoked when a connection loss is detected between the control link
+	 * and the master.  Plugins should respond to this event by throtteling
+	 * messages it is sending to the master to an absolute minimum.
+	 *
+	 * Messages sent over a dropped master connection will get queued up in
+	 * memory in the browser and sent all in one go when the connection is
+	 * re-established again.
+	 *
+	 * ##### resume
+	 *
+	 * Invoked when the connection that had previously dropped is
+	 * re-established.
+	 *
+	 * ##### close
+	 *
+	 * Invoked when the connection to the master has been closed.  This
+	 * typically means the master server has shut down.  Plugins should not
+	 * send any messages that goes to or via the master server after the
+	 * connection has been closed and before a new one is established.
+	 *
+	 * @param {string} event - one of connect, drop, resume and close
+	 */
+	onMasterConnectionEvent(event) { }
 }
 
 /**
diff --git a/packages/master/master.js b/packages/master/master.js
index 4f2e6ee6..e70b488b 100755
--- a/packages/master/master.js
+++ b/packages/master/master.js
@@ -696,6 +696,14 @@ class ControlConnection extends BaseConnection {
 				debugEvents.off("message", this.ws_dumper);
 			}
 		});
+
+		for (let event of ["connect", "drop", "resume", "close"]) {
+			this.connector.on(event, () => {
+				for (let masterPlugin of masterPlugins.values()) {
+					masterPlugin.onControlConnectionEvent(this, event);
+				}
+			});
+		}
 	}
 
 	async getMasterConfigRequestHandler() {
diff --git a/packages/web_ui/src/util/websocket.jsx b/packages/web_ui/src/util/websocket.jsx
index dd93c94a..1faeb891 100644
--- a/packages/web_ui/src/util/websocket.jsx
+++ b/packages/web_ui/src/util/websocket.jsx
@@ -73,6 +73,14 @@ export class Control extends libLink.Link {
 		this.connector.on("close", () => {
 			this.accountName = null;
 		});
+
+		for (let event of ["connect", "drop", "resume", "close"]) {
+			this.connector.on(event, () => {
+				for (let plugin of this.plugins.values()) {
+					plugin.onMasterConnectionEvent(event);
+				}
+			});
+		}
 	}
 
 	async logMessageEventHandler(message) {