diff --git a/app/index.php b/app/index.php
index 78c3bbc..c1f8614 100644
--- a/app/index.php
+++ b/app/index.php
@@ -27,7 +27,7 @@ $module = $_GET['module'] ?? 'dashboard';
 $action = $_GET['action'] ?? 'list';
 
 // Whitelist der Module
-$validModules = ['dashboard', 'locations', 'buildings', 'device_types', 'devices', 'racks', 'floors', 'connections'];
+$validModules = ['dashboard', 'locations', 'buildings', 'device_types', 'devices', 'racks', 'floors', 'connections', 'port_types'];
 
 // Whitelist der Aktionen
 $validActions = ['list', 'edit', 'save', 'ports', 'delete'];
diff --git a/app/modules/port_types/edit.php b/app/modules/port_types/edit.php
new file mode 100644
index 0000000..9334b4d
--- /dev/null
+++ b/app/modules/port_types/edit.php
@@ -0,0 +1,168 @@
+<?php
+/**
+ * app/modules/port_types/edit.php
+ *
+ * Porttyp erstellen / bearbeiten
+ */
+
+// =========================
+// Kontext bestimmen
+// =========================
+$portTypeId = (int)($_GET['id'] ?? 0);
+$portType = null;
+
+if ($portTypeId > 0) {
+    $portType = $sql->single(
+        "SELECT * FROM port_types WHERE id = ?",
+        "i",
+        [$portTypeId]
+    );
+}
+
+$isEdit = !empty($portType);
+$pageTitle = $isEdit ? "Porttyp bearbeiten: " . htmlspecialchars($portType['name']) : "Neuen Porttyp anlegen";
+$mediaOptions = ['copper' => 'Kupfer', 'fiber' => 'Lichtwelle', 'coax' => 'Koax', 'other' => 'Sonstiges'];
+
+$error = $_SESSION['error'] ?? '';
+unset($_SESSION['error']);
+
+?>
+
+<div class="port-type-edit">
+    <h1><?php echo $pageTitle; ?></h1>
+
+    <?php if ($error): ?>
+    <div class="error-message">
+        <?php echo htmlspecialchars($error); ?>
+    </div>
+    <?php endif; ?>
+
+    <form method="post" action="?module=port_types&action=save" class="edit-form">
+
+        <?php if ($isEdit): ?>
+        <input type="hidden" name="id" value="<?php echo $portTypeId; ?>">
+        <?php endif; ?>
+
+        <fieldset>
+            <legend>Details</legend>
+
+            <div class="form-group">
+                <label for="name">Name <span class="required">*</span></label>
+                <input type="text" id="name" name="name" required
+                    value="<?php echo htmlspecialchars($portType['name'] ?? ''); ?>"
+                    placeholder="z.B. RJ45 Gbit">
+            </div>
+
+            <div class="form-group">
+                <label for="medium">Medium</label>
+                <select id="medium" name="medium">
+                    <?php foreach ($mediaOptions as $value => $label): ?>
+                    <option value="<?php echo $value; ?>" <?php echo (($portType['medium'] ?? '') === $value) ? 'selected' : ''; ?>>
+                        <?php echo $label; ?>
+                    </option>
+                    <?php endforeach; ?>
+                </select>
+            </div>
+
+            <div class="form-group">
+                <label for="comment">Beschreibung</label>
+                <textarea id="comment" name="comment" rows="4"><?php echo htmlspecialchars($portType['comment'] ?? ''); ?></textarea>
+            </div>
+        </fieldset>
+
+        <fieldset class="form-actions">
+            <button type="submit" class="button button-primary">Speichern</button>
+            <a href="?module=port_types&action=list" class="button">Zurück zur Liste</a>
+        </fieldset>
+    </form>
+</div>
+
+<style>
+.port-type-edit {
+    max-width: 600px;
+    margin: 20px auto;
+    padding: 20px;
+}
+
+.edit-form {
+    background: white;
+    padding: 20px;
+    border: 1px solid #ddd;
+    border-radius: 8px;
+}
+
+.edit-form fieldset {
+    margin: 20px 0;
+    padding: 15px;
+    border: 1px solid #e0e0e0;
+    border-radius: 4px;
+}
+
+.edit-form legend {
+    padding: 0 10px;
+    font-weight: bold;
+    font-size: 1.1em;
+}
+
+.form-group {
+    margin: 15px 0;
+}
+
+.form-group label {
+    display: block;
+    margin-bottom: 5px;
+    font-weight: bold;
+}
+
+.form-group input[type="text"],
+.form-group select,
+.form-group textarea {
+    width: 100%;
+    padding: 8px 12px;
+    border: 1px solid #ddd;
+    border-radius: 4px;
+    font-family: inherit;
+}
+
+.form-group textarea {
+    resize: vertical;
+}
+
+.required {
+    color: red;
+}
+
+.form-actions {
+    display: flex;
+    gap: 10px;
+    margin-top: 30px;
+}
+
+.button {
+    padding: 10px 15px;
+    background: #007bff;
+    color: white;
+    text-decoration: none;
+    border-radius: 4px;
+    border: none;
+    cursor: pointer;
+    font-size: 0.95em;
+}
+
+.button-primary {
+    background: #28a745;
+}
+
+.button:hover {
+    opacity: 0.8;
+}
+
+.error-message {
+    background: #ffe3e3;
+    color: #a73737;
+    border: 1px solid #f5c2c2;
+    padding: 10px;
+    border-radius: 4px;
+    margin-bottom: 15px;
+}
+</style>
diff --git a/app/modules/port_types/list.php b/app/modules/port_types/list.php
new file mode 100644
index 0000000..d0a7725
--- /dev/null
+++ b/app/modules/port_types/list.php
@@ -0,0 +1,189 @@
+<?php
+/**
+ * app/modules/port_types/list.php
+ *
+ * Liste aller verfügbaren Porttypen
+ */
+
+// =========================
+// Filter einlesen
+// =========================
+$search = trim($_GET['search'] ?? '');
+
+// =========================
+// Filter anwenden
+// =========================
+$where = [];
+$types = '';
+$params = [];
+
+if ($search !== '') {
+    $where[] = "(name LIKE ? OR comment LIKE ?)";
+    $types .= "ss";
+    $params[] = "%$search%";
+    $params[] = "%$search%";
+}
+
+$whereSql = $where ? "WHERE " . implode(" AND ", $where) : "";
+
+$portTypes = $sql->get(
+    "SELECT * FROM port_types
+     $whereSql
+     ORDER BY name",
+    $types,
+    $params
+);
+
+$success = $_SESSION['success'] ?? '';
+unset($_SESSION['success']);
+
+?>
+
+<div class="port-types-container">
+    <h1>Porttypen</h1>
+
+    <?php if ($success): ?>
+    <div class="success-message">
+        <?php echo htmlspecialchars($success); ?>
+    </div>
+    <?php endif; ?>
+
+    <div class="toolbar">
+        <form method="GET" class="filter-form">
+            <input type="hidden" name="module" value="port_types">
+            <input type="hidden" name="action" value="list">
+            <input type="text" name="search" placeholder="Suche Porttyp…"
+                value="<?php echo htmlspecialchars($search); ?>" class="search-input">
+            <button type="submit" class="button">Filter</button>
+            <a href="?module=port_types&action=list" class="button">Reset</a>
+            <a href="?module=port_types&action=edit" class="button button-primary">+ Neuer Porttyp</a>
+        </form>
+    </div>
+
+    <?php if (!empty($portTypes)): ?>
+    <table class="port-types-table">
+        <thead>
+            <tr>
+                <th>Name</th>
+                <th>Medium</th>
+                <th>Beschreibung</th>
+                <th>Aktionen</th>
+            </tr>
+        </thead>
+        <tbody>
+            <?php foreach ($portTypes as $pt): ?>
+            <tr>
+                <td><?php echo htmlspecialchars($pt['name']); ?></td>
+                <td><?php echo htmlspecialchars($pt['medium']); ?></td>
+                <td><small><?php echo htmlspecialchars($pt['comment'] ?? ''); ?></small></td>
+                <td class="actions">
+                    <a href="?module=port_types&action=edit&id=<?php echo (int)$pt['id']; ?>" class="button button-small">Bearbeiten</a>
+                </td>
+            </tr>
+            <?php endforeach; ?>
+        </tbody>
+    </table>
+    <?php else: ?>
+    <div class="empty-state">
+        <p>Keine Porttypen definiert.</p>
+        <a href="?module=port_types&action=edit" class="button button-primary">Porttyp hinzufügen</a>
+    </div>
+    <?php endif; ?>
+</div>
+
+<style>
+.port-types-container {
+    padding: 20px;
+    max-width: 1000px;
+    margin: 0 auto;
+}
+
+.toolbar {
+    margin: 20px 0;
+}
+
+.filter-form {
+    display: flex;
+    gap: 10px;
+    flex-wrap: wrap;
+    align-items: center;
+}
+
+.filter-form input[type="text"] {
+    padding: 8px 12px;
+    border: 1px solid #ddd;
+    border-radius: 4px;
+    flex: 1;
+    min-width: 200px;
+}
+
+.button {
+    display: inline-block;
+    padding: 8px 12px;
+    background: #007bff;
+    color: white;
+    text-decoration: none;
+    border-radius: 4px;
+    border: none;
+    cursor: pointer;
+    font-size: 0.9em;
+}
+
+.button:hover {
+    background: #0056b3;
+}
+
+.button-primary {
+    background: #28a745;
+}
+
+.button-primary:hover {
+    background: #218838;
+}
+
+.button-small {
+    padding: 4px 8px;
+    font-size: 0.85em;
+}
+
+.port-types-table {
+    width: 100%;
+    border-collapse: collapse;
+    margin-top: 15px;
+}
+
+.port-types-table th,
+.port-types-table td {
+    border-bottom: 1px solid #ddd;
+    padding: 12px;
+    text-align: left;
+}
+
+.port-types-table th {
+    background: #f5f5f5;
+    font-weight: bold;
+}
+
+.empty-state,
+.success-message {
+    margin: 20px 0;
+    padding: 15px;
+    border-radius: 6px;
+}
+
+.empty-state {
+    background: #f9f9f9;
+    border: 1px solid #eee;
+    text-align: center;
+}
+
+.success-message {
+    background: #e9f8f1;
+    border: 1px solid #c7eedc;
+    color: #2c7d59;
+}
+
+.actions {
+    white-space: nowrap;
+}
+</style>
diff --git a/app/modules/port_types/save.php b/app/modules/port_types/save.php
new file mode 100644
index 0000000..9461db3
--- /dev/null
+++ b/app/modules/port_types/save.php
@@ -0,0 +1,54 @@
+<?php
+/**
+ * app/modules/port_types/save.php
+ *
+ * Speichert Porttyp-Daten
+ */
+
+if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
+    header('Location: ?module=port_types&action=list');
+    exit;
+}
+
+$portTypeId = (int)($_POST['id'] ?? 0);
+$name = trim($_POST['name'] ?? '');
+$medium = $_POST['medium'] ?? 'other';
+$comment = trim($_POST['comment'] ?? '');
+
+$allowedMediums = ['copper', 'fiber', 'coax', 'other'];
+
+$errors = [];
+
+if ($name === '') {
+    $errors[] = "Name ist erforderlich";
+}
+
+if (!in_array($medium, $allowedMediums, true)) {
+    $errors[] = "Ungültiges Medium";
+}
+
+if (!empty($errors)) {
+    $_SESSION['error'] = implode(', ', $errors);
+    $redirect = $portTypeId ? "?module=port_types&action=edit&id=$portTypeId" : "?module=port_types&action=edit";
+    header("Location: $redirect");
+    exit;
+}
+
+if ($portTypeId > 0) {
+    $sql->set(
+        "UPDATE port_types SET name = ?, medium = ?, comment = ? WHERE id = ?",
+        "sssi",
+        [$name, $medium, $comment, $portTypeId]
+    );
+    $_SESSION['success'] = "Porttyp aktualisiert";
+} else {
+    $sql->set(
+        "INSERT INTO port_types (name, medium, comment) VALUES (?, ?, ?)",
+        "sss",
+        [$name, $medium, $comment]
+    );
+    $_SESSION['success'] = "Porttyp erstellt";
+}
+
+header('Location: ?module=port_types&action=list');
+exit;
diff --git a/app/templates/header.php b/app/templates/header.php
index 68533a8..ec773f8 100644
--- a/app/templates/header.php
+++ b/app/templates/header.php
@@ -35,6 +35,7 @@
         'locations' => 'Standorte',
         'buildings' => 'Gebäude',
         'device_types' => 'Gerätetypen',
+        'port_types' => 'Porttypen',
         'devices' => 'Geräte',
         'racks' => 'Racks',
         'floors' => 'Stockwerke',