diff --git a/server/model/monitor.js b/server/model/monitor.js
index ac8925608..c0a3cce65 100644
--- a/server/model/monitor.js
+++ b/server/model/monitor.js
@@ -534,6 +534,17 @@ class Monitor extends BeanModel {
                     bean.ping = dayjs().valueOf() - startTime;
                 } else if (this.type === "radius") {
                     let startTime = dayjs().valueOf();
+
+                    // Handle monitors that were created before the
+                    // update and as such don't have a value for
+                    // this.port.
+                    let port;
+                    if (this.port == null) {
+                        port = 1812;
+                    } else {
+                        port = this.port;
+                    }
+
                     try {
                         const resp = await radius(
                             this.hostname,
@@ -541,7 +552,8 @@ class Monitor extends BeanModel {
                             this.radiusPassword,
                             this.radiusCalledStationId,
                             this.radiusCallingStationId,
-                            this.radiusSecret
+                            this.radiusSecret,
+                            port
                         );
                         if (resp.code) {
                             bean.msg = resp.code;
diff --git a/server/util-server.js b/server/util-server.js
index cf303ba85..b975a43f3 100644
--- a/server/util-server.js
+++ b/server/util-server.js
@@ -291,6 +291,17 @@ exports.postgresQuery = function (connectionString, query) {
     });
 };
 
+/**
+ * Query radius server
+ * @param {string} hostname Hostname of radius server
+ * @param {string} username Username to use
+ * @param {string} password Password to use
+ * @param {string} calledStationId ID of called station
+ * @param {string} callingStationId ID of calling station
+ * @param {string} secret Secret to use
+ * @param {number} [port=1812] Port to contact radius server on
+ * @returns {Promise<any>}
+ */
 exports.radius = function (
     hostname,
     username,
@@ -298,9 +309,11 @@ exports.radius = function (
     calledStationId,
     callingStationId,
     secret,
+    port = 1812,
 ) {
     const client = new radiusClient({
         host: hostname,
+        hostPort: port,
         dictionaries: [ file ],
     });
 
diff --git a/src/pages/EditMonitor.vue b/src/pages/EditMonitor.vue
index 99cbeb95f..6d1a7e512 100644
--- a/src/pages/EditMonitor.vue
+++ b/src/pages/EditMonitor.vue
@@ -97,8 +97,8 @@
                             </div>
 
                             <!-- Port -->
-                            <!-- For TCP Port / Steam / MQTT Type -->
-                            <div v-if="monitor.type === 'port' || monitor.type === 'steam' || monitor.type === 'mqtt'" class="my-3">
+                            <!-- For TCP Port / Steam / MQTT / Radius Type -->
+                            <div v-if="monitor.type === 'port' || monitor.type === 'steam' || monitor.type === 'mqtt' || monitor.type === 'radius'" class="my-3">
                                 <label for="port" class="form-label">{{ $t("Port") }}</label>
                                 <input id="port" v-model="monitor.port" type="number" class="form-control" required min="0" max="65535" step="1">
                             </div>
@@ -616,9 +616,11 @@ export default {
             }
 
             // Set default port for DNS if not already defined
-            if (! this.monitor.port || this.monitor.port === "53") {
+            if (! this.monitor.port || this.monitor.port === "53" || this.monitor.port === "1812") {
                 if (this.monitor.type === "dns") {
                     this.monitor.port = "53";
+                } else if (this.monitor.type === "radius") {
+                    this.monitor.port = "1812";
                 } else {
                     this.monitor.port = undefined;
                 }