Cant get google tag manager to work

[Nikolaos_SP]

Hello!

We cant setup GTM to work on our forum: https://forum.warthunder.com/

As you can see there is error about content security policy.

Refused to execute inline script because it violates the following Content Security Policy directive: "script-src https://forum.warthunder.com/logs/ https://forum.warthunder.com/sidekiq/ https://forum.warthunder.com/mini-profiler-resources/ https://forum.warthunder.com/assets/ https://forum.warthunder.com/brotli_asset/ https://forum.warthunder.com/extra-locales/ https://forum.warthunder.com/highlight-js/ https://forum.warthunder.com/javascripts/ https://forum.warthunder.com/plugins/ https://forum.warthunder.com/theme-javascripts/ https://forum.warthunder.com/svg-sprite/ https://www.googletagmanager.com/gtm.js 'nonce-857b78b0187f8ee53100212842747417' 'sha256-HZxBMVZe6P3MvHDZlFai9cUmLH+qwX6BNT3qTwNPATg='". Either the 'unsafe-inline' keyword, a hash ('sha256-93qwY4D574Ysts67Kmc0jpUYGBwBuG9q6hhQl+Kk9us='), or a nonce ('nonce-...') is required to enable inline execution.

Urls are good in CSP header, and nonce is correct.

Do you know what might be the problem?

Thanks.

[Lilly]

hi @Nikolaos_SP welcome to Meta

maybe have a look at this topic

Google Tag Manager (gtm) script blocked by CSP

Hi there! I’m having a hard time figuring out why our GTM script is being blocked by our CSP: [Screenshot 2023-06-30 at 4.16.51 PM] Here’s the script: <!-- Google Tag Manager --> <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start': new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0], j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src= 'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f); })(window,document,'sc…

[Nikolaos_SP]

Hello Lilly

I read that article and alot of others on this forum, and nothing helped

Main page set CSP header correcly, there is gtm address in script src. And there is also nonce, but browser still for some reason block script loading.

[Jagster (Jakke Lehtonen)]

What happends if you don’t use CSP, aka. Report-only?

[Nikolaos_SP]

If i disable content security policy in admin panel, then it works normally.
But that would be security risk then.

[Jagster (Jakke Lehtonen)]

Actually isn’t that big risk, if at all. CSP is very unreliable way, and security will fall anyway because there is quite big must to allow everything, if one want keep things in work.

But for you that is quite easy dilemma: do you really need that extra layer of security or do you need google tags? Or can you use Matomo instead?

[jboilesen (Jonathan Boilesen)]

@Nikolaos_SP

I have added the googletagmanager.com domain to SCP whitelist and it worked for me.