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<!doctype html><html lang=en-us><head><meta charset=UTF-8><meta name=viewport content="width=device-width,initial-scale=1"><title>Zero Trust Application Gateway · wireguard_webadmin</title><meta name=description content="Learn how wireguard_webadmin implements Zero Trust access control to safely publish internal apps like Grafana, Proxmox, and more."><link rel=alternate hreflang=en-us href=https://wireguard-webadmin.com/zero-trust/><link rel=alternate hreflang=pt-BR href=https://wireguard-webadmin.com/pt-br/zero-trust/><link rel=alternate hreflang=es href=https://wireguard-webadmin.com/es/zero-trust/><link rel=alternate hreflang=fr href=https://wireguard-webadmin.com/fr/zero-trust/><link rel=alternate hreflang=de href=https://wireguard-webadmin.com/de/zero-trust/><link rel=alternate hreflang=x-default href=https://wireguard-webadmin.com/><meta property="og:type" content="website"><meta property="og:url" content="https://wireguard-webadmin.com/zero-trust/"><meta property="og:title" content="Zero Trust Application Gateway · wireguard_webadmin"><meta property="og:description" content="Learn how wireguard_webadmin implements Zero Trust access control to safely publish internal apps like Grafana, Proxmox, and more."><meta property="og:image" content="https://wireguard-webadmin.com/og-image.png"><meta property="og:image:width" content="1280"><meta property="og:image:height" content="800"><meta name=twitter:card content="summary_large_image"><meta name=twitter:title content="Zero Trust Application Gateway · wireguard_webadmin"><meta name=twitter:description content="Learn how wireguard_webadmin implements Zero Trust access control to safely publish internal apps like Grafana, Proxmox, and more."><meta name=twitter:image content="https://wireguard-webadmin.com/og-image.png"><link rel=icon type=image/svg+xml href=/favicon.svg><link rel=preconnect href=https://fonts.googleapis.com><link rel=preconnect href=https://fonts.gstatic.com crossorigin><link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;600&display=swap" rel=stylesheet><link rel=stylesheet href=/css/main.min.css></head><body><header class=site-header><div class=container><nav class=nav-inner><a href=/ class=nav-logo>wireguard_<span>webadmin</span></a>
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<span></span><span></span><span></span></button><ul class=nav-links><li><a href=/>Home</a></li><li><a href=/zero-trust/ aria-current=page>Zero Trust</a></li><li><a href=/deployment/>Deployment</a></li><li><a href=/get-involved/>Get Involved</a></li><li><a href=https://github.com/eduardogsilva/wireguard_webadmin target=_blank rel=noopener class=nav-github><svg width="16" height="16" viewBox="0 0 24 24" fill="currentColor"><path d="M12 0C5.374.0.0 5.373.0 12c0 5.302 3.438 9.8 8.207 11.387.599.111.793-.261.793-.577v-2.234c-3.338.726-4.033-1.416-4.033-1.416-.546-1.387-1.333-1.756-1.333-1.756-1.089-.745.083-.729.083-.729 1.205.084 1.839 1.237 1.839 1.237 1.07 1.834 2.807 1.304 3.492.997.107-.775.418-1.305.762-1.604-2.665-.305-5.467-1.334-5.467-5.931.0-1.311.469-2.381 1.236-3.221-.124-.303-.535-1.524.117-3.176.0.0 1.008-.322 3.301 1.23A11.509 11.509.0 0112 5.803c1.02.005 2.047.138 3.006.404 2.291-1.552 3.297-1.23 3.297-1.23.653 1.653.242 2.874.118 3.176.77.84 1.235 1.911 1.235 3.221.0 4.609-2.807 5.624-5.479 5.921.43.372.823 1.102.823 2.222v3.293c0 .319.192.694.801.576C20.566 21.797 24 17.3 24 12c0-6.627-5.373-12-12-12z"/></svg>
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<span>Deutsch</span></a></li></ul></li></ul></nav></div></header><main><section class=page-hero><div class=container><div class=section-label>Zero Trust</div><h1>Zero Trust Application Gateway</h1><p class=section-sub style=margin-top:1rem>Publish internal services securely — without exposing them to the internet.</p></div></section><div class=page-content><div class=container><h2 id=what-is-zero-trust-here>What is Zero Trust here?</h2><p>Traditional network security assumes that anything inside your network can be trusted.
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Zero Trust flips that model: <strong>no request is trusted by default</strong>, even if it comes from inside the VPN.</p><p>In wireguard_webadmin, the Zero Trust application gateway sits in front of your internal services.
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Every request must authenticate before reaching the app — the service itself never needs to be exposed directly.</p><hr><h2 id=how-a-request-flows>How a request flows</h2><div class=flow-cards><div class=flow-card><div class=flow-card-header><span class=flow-card-num>1</span> <strong>Client reaches gateway</strong></div><p>The public endpoint receives the request instead of the internal service.</p></div><div class=flow-card><div class=flow-card-header><span class=flow-card-num>2</span> <strong>Browser validation</strong></div><p>Altcha proof-of-work can challenge automated abuse before login even starts.</p></div><div class=flow-card><div class=flow-card-header><span class=flow-card-num>3</span> <strong>Identity checks</strong></div><p>Credentials, TOTP, and source IP policy are evaluated.</p></div><div class=flow-card><div class=flow-card-header><span class=flow-card-num>4</span> <strong>Forward to upstream</strong></div><p>Only approved requests are proxied to Grafana, Proxmox, or another internal app.</p></div></div><hr><h2 id=authentication-methods>Authentication methods</h2><div class=auth-list><div class=auth-row><div class=auth-row-name>TOTP / 2FA</div><div class=auth-row-desc>Time-based one-time passwords. Works with any TOTP app — Google Authenticator, Aegis, Authy.</div></div><div class=auth-row><div class=auth-row-name>Local credentials</div><div class=auth-row-desc>Username and password managed inside wireguard_webadmin. No external IdP required.</div></div><div class=auth-row><div class=auth-row-name>IP ACL</div><div class=auth-row-desc>Whitelist specific IPs or subnets. VPN peers can be automatically trusted by their tunnel address.</div></div><div class=auth-row><div class=auth-row-name>OIDC <span class=auth-coming>coming soon</span></div><div class=auth-row-desc>Delegate authentication to Keycloak, Authentik, Google Workspace, or any OIDC-compatible provider.</div></div></div><hr><h2 id=anti-brute-force-altcha-proof-of-work>Anti-brute-force: Altcha proof-of-work</h2><p>Before any login form is shown, the browser must solve a lightweight computational challenge
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(<a href=https://altcha.org/ target=_blank rel=noopener>Altcha</a>).</p><p>This has zero friction for real users (solved in milliseconds by modern hardware) but makes
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automated credential-stuffing attacks computationally expensive at scale.</p><div class=callout><p><strong>Layered protection:</strong> Rate limiting is already in place. Proof-of-work complements it — where rate limiting bounds the request volume per IP, Altcha adds a per-request computational cost that makes distributed attacks expensive regardless of how many source IPs are involved.</p></div><hr><h2 id=use-cases>Use cases</h2><ul><li>Expose <strong>Grafana</strong> to your team without opening port 3000 to the internet</li><li>Publish a <strong>Proxmox</strong> web console behind TOTP, accessible only from your VPN</li><li>Share a <strong>self-hosted app</strong> with a client with time-limited credentials</li><li>Gate any <strong>internal HTTP service</strong> without touching its configuration</li></ul><div class="callout green"><p><strong>No app changes required.</strong> The gatekeeper proxies the request transparently.
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Your internal service doesn't need to implement authentication — the gateway handles it.</p></div><hr><p>VPN management and the application gateway run as a single self-hosted stack. No account at a third-party service, no outbound tunnel dependency, no traffic leaving your infrastructure.</p></div></div></main><footer class=site-footer><div class=container><div class=footer-inner><div class=footer-logo>wireguard_<span>webadmin</span></div><ul class=footer-links><li><a href=https://github.com/eduardogsilva/wireguard_webadmin target=_blank rel=noopener>GitHub</a></li><li><a href=https://github.com/eduardogsilva/wireguard_webadmin/discussions target=_blank rel=noopener>Discussions</a></li><li><a href=/zero-trust/>Zero Trust</a></li><li><a href=/deployment/>Deployment</a></li><li><a href=/get-involved/>Get Involved</a></li></ul><div class=footer-built>built by <a href=https://github.com/eduardogsilva target=_blank rel=noopener>@eduardogsilva</a></div></div></div></footer><script>document.querySelectorAll(".tab-btn").forEach(e=>{e.addEventListener("click",()=>{const t=e.closest(".tab-group");t.querySelectorAll(".tab-btn").forEach(e=>e.classList.remove("active")),t.querySelectorAll(".tab-panel").forEach(e=>e.classList.remove("active")),e.classList.add("active"),t.querySelector("#"+e.dataset.tab).classList.add("active")})});const hamburger=document.querySelector(".hamburger"),navLinks=document.querySelector(".nav-links");hamburger&&(hamburger.addEventListener("click",e=>{e.stopPropagation();const t=navLinks.classList.toggle("open");hamburger.classList.toggle("open",t),hamburger.setAttribute("aria-expanded",t)}),document.addEventListener("click",e=>{!navLinks.contains(e.target)&&!hamburger.contains(e.target)&&(navLinks.classList.remove("open"),hamburger.classList.remove("open"),hamburger.setAttribute("aria-expanded",!1))}));const langBtn=document.querySelector(".lang-btn"),langDropdown=document.querySelector(".lang-dropdown");if(langBtn&&(langBtn.addEventListener("click",e=>{e.stopPropagation();const t=langDropdown.classList.toggle("open");langBtn.setAttribute("aria-expanded",t)}),document.addEventListener("click",e=>{langDropdown.contains(e.target)||(langDropdown.classList.remove("open"),langBtn.setAttribute("aria-expanded",!1))}),langDropdown.querySelectorAll(".lang-menu a").forEach(e=>{e.addEventListener("click",()=>localStorage.setItem("lang-manual","1"))})),location.pathname==="/"&&!localStorage.getItem("lang-manual")){const t=(navigator.language||navigator.userLanguage||"en").toLowerCase(),n=[{prefix:"pt",url:"/pt-br/"},{prefix:"es",url:"/es/"},{prefix:"fr",url:"/fr/"},{prefix:"de",url:"/de/"}],e=n.find(e=>t.startsWith(e.prefix));e&&location.replace(e.url)}</script></body></html> |