CSP with GTM Server-Side Tagging: A Real-World Fix
Running a strict Content Security Policy alongside Google Tag Manager is where theory usually collides with production traffic. I’ve seen the same pattern a few times: a team moves to server-side tagging because they want better control over analytics, fewer third-party requests in the browser, and a cleaner privacy story. Then they realize their CSP still looks like a traditional client-side GTM setup. They’re proxying measurement through their own tagging server, but the browser is still allowed to talk to half of Google’s infrastructure. ...