diff --git a/android/TerminalApp/res/drawable/ic_add.xml b/android/TerminalApp/res/drawable/ic_add.xml
new file mode 100644
index 0000000..ebe9284
--- /dev/null
+++ b/android/TerminalApp/res/drawable/ic_add.xml
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--  Copyright 2024 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+ -->
+
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="960"
+    android:viewportHeight="960"
+    android:tint="?attr/colorControlNormal">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M440,520L200,520L200,440L440,440L440,200L520,200L520,440L760,440L760,520L520,520L520,760L440,760L440,520Z"/>
+</vector>
diff --git a/android/TerminalApp/res/layout/settings_port_forwarding.xml b/android/TerminalApp/res/layout/settings_port_forwarding.xml
index 77b9bf7..880ac44 100644
--- a/android/TerminalApp/res/layout/settings_port_forwarding.xml
+++ b/android/TerminalApp/res/layout/settings_port_forwarding.xml
@@ -14,7 +14,9 @@
      limitations under the License.
  -->
 
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:orientation="vertical"
@@ -46,13 +48,35 @@
         android:layout_width="match_parent"
         android:layout_height="wrap_content" />
 
-    <TextView
+
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_width="wrap_content"
-        android:text="@string/settings_port_forwarding_other_enabled_ports_title"
-        android:textSize="24sp"
-        android:hyphenationFrequency="full"
-        android:layout_marginBottom="24dp"/>
+        android:layout_marginBottom="24dp">
+
+        <TextView
+            android:layout_height="wrap_content"
+            android:layout_width="wrap_content"
+            android:text="@string/settings_port_forwarding_other_enabled_ports_title"
+            android:textSize="24sp"
+            android:hyphenationFrequency="full"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintStart_toStartOf="parent" />
+
+        <ImageButton
+            android:id="@+id/settings_port_forwarding_inactive_add_button"
+            android:src="@drawable/ic_add"
+            android:background="@android:color/transparent"
+            android:contentDescription="@string/settings_port_forwarding_other_enabled_port_add_button"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginHorizontal="16dp"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="parent" />
+
+    </androidx.constraintlayout.widget.ConstraintLayout>
 
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/settings_port_forwarding_inactive_recycler_view"
diff --git a/android/TerminalApp/res/layout/settings_port_forwarding_inactive_add_dialog.xml b/android/TerminalApp/res/layout/settings_port_forwarding_inactive_add_dialog.xml
new file mode 100644
index 0000000..84fb611
--- /dev/null
+++ b/android/TerminalApp/res/layout/settings_port_forwarding_inactive_add_dialog.xml
@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--  Copyright 2024 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+ -->
+
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="vertical"
+    android:padding="16dp">
+
+    <EditText
+        android:id="@+id/settings_port_forwarding_inactive_add_dialog_text"
+        android:hint="@string/settings_port_forwarding_dialog_textview_hint"
+        android:importantForAutofill="no"
+        android:inputType="number"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content" />
+
+</LinearLayout>
diff --git a/android/TerminalApp/res/layout/settings_port_forwarding_inactive_item.xml b/android/TerminalApp/res/layout/settings_port_forwarding_inactive_item.xml
index 127b152..3e0d53b 100644
--- a/android/TerminalApp/res/layout/settings_port_forwarding_inactive_item.xml
+++ b/android/TerminalApp/res/layout/settings_port_forwarding_inactive_item.xml
@@ -34,7 +34,7 @@
         app:layout_constraintStart_toStartOf="parent"/>
 
     <ImageButton
-        android:id="@+id/settings_port_forwarding_active_item_close_button"
+        android:id="@+id/settings_port_forwarding_inactive_item_close_button"
         android:src="@drawable/ic_close"
         android:background="@android:color/transparent"
         android:contentDescription="@null"
diff --git a/android/TerminalApp/res/values/strings.xml b/android/TerminalApp/res/values/strings.xml
index 493496c..e39c7c6 100644
--- a/android/TerminalApp/res/values/strings.xml
+++ b/android/TerminalApp/res/values/strings.xml
@@ -89,7 +89,9 @@
     <string name="settings_port_forwarding_active_ports_title">Listening ports</string>
     <!-- Title for other enabled ports setting in port forwarding [CHAR LIMIT=none] -->
     <string name="settings_port_forwarding_other_enabled_ports_title">Saved allowed ports</string>
-    <!-- Description of close button for other enabled ports. Used for talkback. [CHAR LIMIT=none] -->
+    <!-- Description of add button for other enabled ports. Used for talkback. [CHAR LIMIT=16] -->
+    <string name="settings_port_forwarding_other_enabled_port_add_button">Add</string>
+    <!-- Description of close button for other enabled ports. Used for talkback. [CHAR LIMIT=16] -->
     <string name="settings_port_forwarding_other_enabled_port_close_button">Delete <xliff:g id="port_number" example="8000">%d</xliff:g></string>
 
     <!-- Dialog title for enabling a new port [CHAR LIMIT=none] -->
@@ -100,6 +102,12 @@
     <string name="settings_port_forwarding_dialog_save">Save</string>
     <!-- Dialog cancel action for enabling a new port [CHAR LIMIT=16] -->
     <string name="settings_port_forwarding_dialog_cancel">Cancel</string>
+    <!-- Dialog error message for non number format input [CHAR LIMIT=none] -->
+    <string name="settings_port_forwarding_dialog_error_invalid_input">Please enter a number</string>
+    <!-- Dialog error message for invalid port number [CHAR LIMIT=none] -->
+    <string name="settings_port_forwarding_dialog_error_invalid_port_range">Invalid port number</string>
+    <!-- Dialog error message for existing port [CHAR LIMIT=none] -->
+    <string name="settings_port_forwarding_dialog_error_existing_port">Port already exists</string>
 
     <!-- Notification title for a new active port [CHAR LIMIT=none] -->
     <string name="settings_port_forwarding_notification_title">Terminal is requesting to open a new port</string>