diff --git a/allowed_units.txt b/allowed_units.txt
deleted file mode 100644
index 6b853e3..0000000
--- a/allowed_units.txt
+++ /dev/null
@@ -1,4 +0,0 @@
-demo1.service
-demo2.service
-sonarr.service
-mediaserver.service
diff --git a/webui/html/assets/css/app.css b/webui/html/assets/css/app.css
index cda0294..e03a102 100644
--- a/webui/html/assets/css/app.css
+++ b/webui/html/assets/css/app.css
@@ -153,6 +153,11 @@ tr:hover td{background: rgba(96,165,250,.06)}
     font-size:12px;
     color: var(--muted);
 }
+pre.code{
+  padding:10px;
+  border-radius:10px;
+  border:1px solid rgba(255,255,255,.15);
+}
 .badge.ok{border-color: rgba(45,212,191,.6); color: var(--ok)}
 .badge.bad{border-color: rgba(251,113,133,.6); color: var(--bad)}
 .badge.warn{border-color: rgba(251,191,36,.6); color: var(--warn)}
diff --git a/webui/html/index.html b/webui/html/index.html
index b3c78e2..c36a454 100644
--- a/webui/html/index.html
+++ b/webui/html/index.html
@@ -41,7 +41,6 @@
     <div class="sidebarTop">
       <button class="btn small ghost sidebarToggle" id="sidebarToggle" title="Sidebar in/uitklappen">☰</button>
     </div>
-
     <div class="tabs">
       <div class="tab active" id="tab-dashboard" onclick="setTab('dashboard')" title="Dashboard">
         <span class="navIcon">🏠</span><span class="navLabel">Dashboard</span>
@@ -49,6 +48,9 @@
       <div class="tab" id="tab-containers" onclick="setTab('containers')" title="Containers">
         <span class="navIcon">📦</span><span class="navLabel">Containers</span>
       </div>
+      <div class="tab" id="tab-networks" onclick="setTab('networks')" title="Netwerk">
+        <span class="navIcon">🌐</span><span class="navLabel">Netwerk</span>
+      </div>
       <div class="tab" id="tab-files" onclick="setTab('files')" title="Files">
         <span class="navIcon">📁</span><span class="navLabel">Files</span>
       </div>
@@ -108,6 +110,38 @@
     </div>
   </div>
 
+  <div id="view-networks" style="display:none;">
+    <div class="card">
+      <div class="cardHeader">
+        <h2>Netwerken</h2>
+        <div class="row gap">
+          <button class="btn small" id="networksRefreshBtn">Vernieuwen</button>
+        </div>
+      </div>
+
+      <div id="networksStatus" class="muted" style="margin:8px 0;"></div>
+
+      <table class="table" id="networksTable">
+        <thead>
+          <tr>
+            <th style="width:40px;"></th>
+            <th>Netwerk</th>
+            <th># containers</th>
+          </tr>
+        </thead>
+        <tbody id="networksTbody"></tbody>
+      </table>
+    </div>
+
+    <div class="card" style="margin-top:12px;">
+      <div class="cardHeader">
+        <h2>Relaties</h2>
+      </div>
+
+      <div id="networksRelations"></div>
+    </div>
+  </div>
+
   <div id="view-files" class="grid" style="display:none">
     <div class="card" style="grid-column: 1 / -1;">
       <div class="cardHeader">
@@ -196,6 +230,28 @@
       .replaceAll("'","&#039;");
   }
 
+  async function apiGet(path) {
+    const r = await fetch('/api' + path, { headers: { 'Accept': 'application/json' } });
+    if (!r.ok) {
+      const t = await r.text().catch(()=> '');
+      throw new Error(`HTTP ${r.status} ${path}: ${t}`);
+    }
+    return r.json();
+  }
+
+  async function fetchNetworksUsage() {
+    return apiGet('/networks/usage');
+  }
+
+  async function fetchNetworksList() {
+    // returns { networks: [...] }
+    return apiGet('/networks');
+  }
+
+  async function fetchNetworkInspect(name) {
+    return apiGet('/networks/' + encodeURIComponent(name));
+  }  
+
   function badgeFromStatus(s) {
     const t = (s || '').toLowerCase();
     if (t.includes('running') || t === 'running' || t === 'active') return `<span class="badge ok">${esc(s)}</span>`;
@@ -243,6 +299,9 @@
     if (tab === 'files') {
       filesRefresh();
     }
+    if (tab === 'networks') {
+      networksRefresh();
+    }
     
     // Start/stop live stats alleen in Containers tab
     if (tab === 'containers') startContainersStatsStream();
@@ -721,6 +780,201 @@
       showModal('daemon-reload fout', e.stack || e.message);
     }
   }
+  // =========================
+  // Files tab (systemd subtree)
+  // =========================
+
+  let networksState = {
+    expanded: new Set(),      // welke networks staan open
+    usage: null,
+    list: null,
+    inspectCache: new Map(),  // name -> inspect json
+  };
+
+  function toggleNetworkRow(name) {
+    if (networksState.expanded.has(name)) networksState.expanded.delete(name);
+    else networksState.expanded.add(name);
+    renderNetworks(); // re-render
+  }
+
+  async function networksRefresh() {
+    const statusEl = document.getElementById('networksStatus');
+    statusEl.textContent = 'Bezig met laden...';
+
+    try {
+      const [usage, list] = await Promise.all([
+        fetchNetworksUsage(),
+        fetchNetworksList(),
+      ]);
+      networksState.usage = usage;
+      networksState.list = list;
+      statusEl.textContent = `Laatst geladen: ${new Date().toLocaleString()}`;
+      renderNetworks();
+    } catch (e) {
+      console.error(e);
+      statusEl.textContent = 'Fout: ' + (e?.message || e);
+    }
+  }
+
+  function renderNetworks() {
+    const tbody = document.getElementById('networksTbody');
+    const rel = document.getElementById('networksRelations');
+    tbody.innerHTML = '';
+    rel.innerHTML = '';
+
+    const usage = networksState.usage;
+    if (!usage || !usage.byNetwork) {
+      tbody.innerHTML = `<tr><td colspan="3" class="muted">Geen data. Klik op Vernieuwen.</td></tr>`;
+      rel.innerHTML = `<div class="muted">Geen data.</div>`;
+      return;
+    }
+
+    const byNetwork = usage.byNetwork;
+
+    // Sorteer op naam
+    const names = Object.keys(byNetwork).sort((a,b) => a.localeCompare(b));
+
+    // Build rows
+    for (const netName of names) {
+      const slot = byNetwork[netName] || {};
+      const containers = slot.containers || [];
+      const isOpen = networksState.expanded.has(netName);
+
+      const arrow = isOpen ? '▾' : '▸';
+
+      // hoofd-rij
+      const tr = document.createElement('tr');
+      tr.innerHTML = `
+        <td><button class="btn small ghost" title="Open/dicht">${arrow}</button></td>
+        <td>${esc(netName)}</td>
+        <td>${containers.length}</td>
+      `;
+      tr.querySelector('button').addEventListener('click', () => toggleNetworkRow(netName));
+      tbody.appendChild(tr);
+
+      // detail-rij (uitklap)
+      if (isOpen) {
+        const tr2 = document.createElement('tr');
+        tr2.innerHTML = `
+          <td></td>
+          <td colspan="2">
+            <div style="padding:8px 0;">
+              ${renderNetworkUsersListHTML(netName, containers)}
+              <div class="row gap" style="margin-top:8px;">
+                <button class="btn small" data-inspect="${esc(netName)}">Inspect details</button>
+                <span class="muted" id="inspectStatus-${cssId(netName)}"></span>
+              </div>
+              <pre class="code" id="inspectBox-${cssId(netName)}" style="display:none; margin-top:8px; max-height:260px; overflow:auto;"></pre>
+            </div>
+          </td>
+        `;
+        tbody.appendChild(tr2);
+
+        // inspect button handler
+        const btn = tr2.querySelector('button[data-inspect]');
+        btn.addEventListener('click', async () => {
+          await onInspectNetwork(netName);
+        });
+      }
+    }
+
+    // Relaties sectie
+    rel.innerHTML = renderNetworksRelationsHTML(usage);
+  }
+
+  function renderNetworkUsersListHTML(netName, containers) {
+    if (!containers.length) {
+      return `<div class="muted">Geen containers gevonden op dit netwerk.</div>`;
+    }
+
+    // lijstje
+    const rows = containers.map(c => {
+      const cname = c.name || '?';
+      const pod = c.pod || '';
+      const shared = c.networkMode && String(c.networkMode).startsWith('container:');
+      const via = c.networkOwnerName ? `via ${c.networkOwnerName}` : (c.networkOwnerId ? `via ${c.networkOwnerId}` : '');
+
+      const badges = [];
+      if (pod) badges.push(`<span class="badge">pod: ${esc(pod)}</span>`);
+      if (shared) badges.push(`<span class="badge">shared netns</span>`);
+      if (via) badges.push(`<span class="badge">${esc(via)}</span>`);
+
+      return `<li>
+        <b>${esc(cname)}</b>
+        ${badges.length ? `<div class="row gap" style="margin-top:4px; flex-wrap:wrap;">${badges.join('')}</div>` : ``}
+      </li>`;
+    }).join('');
+
+    return `<div>
+      <div class="muted" style="margin-bottom:6px;">Containers op <b>${esc(netName)}</b>:</div>
+      <ul style="margin:0; padding-left:18px;">${rows}</ul>
+    </div>`;
+  }
+
+  function renderNetworksRelationsHTML(usage) {
+    const byContainer = usage.byContainer || {};
+    const byMeta = usage.byContainerMeta || {};
+
+    // A) containers met meerdere netwerken
+    const multi = Object.entries(byContainer)
+      .filter(([_, nets]) => Array.isArray(nets) && nets.length > 1)
+      .sort((a,b) => a[0].localeCompare(b[0]));
+
+    // B) shared netns containers
+    const shared = Object.entries(byMeta)
+      .filter(([_, meta]) => meta && meta.networkMode && String(meta.networkMode).startsWith('container:'))
+      .sort((a,b) => a[0].localeCompare(b[0]));
+
+    let html = '';
+
+    html += `<h3 style="margin:0 0 6px 0;">Containers met meerdere netwerken</h3>`;
+    if (!multi.length) {
+      html += `<div class="muted" style="margin-bottom:12px;">Geen.</div>`;
+    } else {
+      html += `<ul style="margin:0 0 12px 0; padding-left:18px;">` + multi.map(([name, nets]) =>
+        `<li><b>${esc(name)}</b> → ${esc(nets.join(', '))}</li>`
+      ).join('') + `</ul>`;
+    }
+
+    html += `<h3 style="margin:0 0 6px 0;">Shared network namespace</h3>`;
+    if (!shared.length) {
+      html += `<div class="muted">Geen.</div>`;
+    } else {
+      html += `<ul style="margin:0; padding-left:18px;">` + shared.map(([name, meta]) => {
+        const owner = meta.networkOwnerName || meta.networkOwnerId || '?';
+        return `<li><b>${esc(name)}</b> deelt netwerkstack met <b>${esc(owner)}</b></li>`;
+      }).join('') + `</ul>`;
+    }
+
+    return html;
+  }
+
+  // helper: maak safe id voor DOM
+  function cssId(s) {
+    return String(s).replaceAll(/[^a-zA-Z0-9_-]/g, '_');
+  }
+
+  async function onInspectNetwork(name) {
+    const key = name;
+    const box = document.getElementById('inspectBox-' + cssId(name));
+    const status = document.getElementById('inspectStatus-' + cssId(name));
+
+    status.textContent = 'Inspect laden...';
+
+    try {
+      let data = networksState.inspectCache.get(key);
+      if (!data) {
+        data = await fetchNetworkInspect(name);
+        networksState.inspectCache.set(key, data);
+      }
+      box.style.display = '';
+      box.textContent = JSON.stringify(data, null, 2);
+      status.textContent = '';
+    } catch (e) {
+      console.error(e);
+      status.textContent = 'Fout: ' + (e?.message || e);
+    }
+  }
 
   // =========================
   // Files tab (systemd subtree)
@@ -950,6 +1204,9 @@
     applySidebarState();
     const t = document.getElementById('sidebarToggle');
     if (t) t.onclick = toggleSidebar;
+    
+    // Networks refresh button: 1x listener (niet in setTab!)
+    document.getElementById('networksRefreshBtn')?.addEventListener('click', networksRefresh);
 
     // Files editor: CodeMirror init (alleen als textarea bestaat)
     const taFiles = document.getElementById('filesEditor');