| Filtering System | Blocking Mechanism | Google Sites Proxy Evasion? | Reason | | :--- | :--- | :--- | :--- | | DNS Blacklist | Domain denylist | | The requested domain is sites.google.com (allowlisted). | | SNI Inspection | TLS Server Name Indication | Yes | The SNI reveals sites.google.com , not the target. | | URL Keyword Filter | Regex on path (e.g., proxy.php ) | Yes | Path is /a/.../edit or similar; no proxy signatures. | | DPI Pattern Matching | Static proxy headers | Partial | If the relay script uses known CORS proxies (e.g., cors-anywhere ), DPI can block the outbound fetch, but not the Sites page itself. | | Content Security Policy | frame-ancestors / connect-src | No | A strict CSP blocking connect-src * would break the proxy. |
// Embedded in a Google Sites "Embed Code" box function fetchViaProxy(url) fetch('https://cors-anywhere.herokuapp.com/' + url) .then(response => response.text()) .then(html => let modifiedHtml = html.replace(/href="https:\/\//g, 'href="?url='); document.getElementById('output').innerHTML = modifiedHtml; ); google sites proxy unblocker
The proxy is highly effective against legacy URL filters and SNI-based blockers but fails against modern CSP or outbound traffic analysis. 4. Security & Ethical Implications While often used for benign access (e.g., checking social media during a blocked lunch hour), the Google Sites proxy method introduces significant risks. | Filtering System | Blocking Mechanism | Google