topic EUM - Browser violation error in Splunk AppDynamics

EUM - Browser violation error

Khalid_Rehan2 — Wed, 11 Sep 2024 11:09:18 GMT

Dears,

I'm getting an error after loading the adrum.js:

Refused to frame https://cdn.appdynamics.com/ because it violates the following Content Security Policy directive: frame-src 'self' www.google.comwww.google.com

The EUM is reachable.EUM-processor: version-'24.4.0.0', commit-cd:XXXXXXXXXXXXXXb, build-release/24.4.0.next #24.4.0-35342, timestamp=2024-05-02 01:18:33

The backend is Microsoft SharePoint. CSP has added both the CDN and EUM servers.

Regards,
Khalid

Re: EUM - Browser violation error

iamryan — Thu, 12 Sep 2024 20:40:06 GMT

Hi @Khalid.Rehan,

I found this AppDynamics Docs page that I think would be helpful. Please have a read and let me know if it helped.

https://docs.appdynamics.com/appd/22.x/latest/en/end-user-monitoring/browser-monitoring/browser-real-user-monitoring/enable-the-content-security-policy-csp

Re: EUM - Browser violation error

Khalid_Rehan2 — Sun, 20 Oct 2024 11:17:39 GMT

Hi Ryan,

unfortunately, it did not work applying what is recommended in the doc you shared:

C:\inetpub\wwwroot\wss\VirtualDirectories\{your-site}
Add the CSP Header to the <httpProtocol> section of the Web.config file.

<system.webServer>
   <httpProtocol>
      <customHeaders>
         <add name="Content-Security-Policy" value="script-src 'unsafe-inline' cdn.appdynamics.com; connect-src peum.kaska.com; img-src cdn.appdynamics.com; child-src cdn.appdynamics.com;" />
      </customHeaders>
   </httpProtocol>
</system.webServer>

The application crashed and we had to rollback.

Notes: the agent is loaded successfully.

Any other suggestions? Where else to look?

Re: EUM - Browser violation error

iamryan — Tue, 22 Oct 2024 15:52:20 GMT

Hi @Khalid.Rehan,

If I find any new info, I'll share it here. If you find any new information or a solution, please share it here.

Re: EUM - Browser violation error

Khalid_Rehan2 — Tue, 19 Nov 2024 10:27:02 GMT

Hi @Ryan.Paredez ,

We were able to fix the problem by disabling the config.xd in the EUM snippet 😄

config.xd = {enable : false};

Example:

<script charset='UTF-8'>
window['adrum-start-time'] = new Date().getTime();
(function(config){
    config.appKey = 'EUM-XYZ-ABC';
    config.adrumExtUrlHttp = 'https://cdn.appdynamics.com';
    config.adrumExtUrlHttps = 'https://cdn.appdynamics.com';
    config.beaconUrlHttp = 'https://eum.myappd.com';
    config.beaconUrlHttps = 'https://eum.myappd.com';
    config.xd = {enable : false};
})(window['adrum-config'] || (window['adrum-config'] = {}));
</script>
<script src='https://cdn.appdynamics.com/adrum/adrum-latest.js'></script>

Regards,

Khalid

Re: EUM - Browser violation error

iamryan — Tue, 19 Nov 2024 16:51:11 GMT

Hi @Khalid.Rehan,

Thank you for sharing the solution!

Re: EUM - Browser violation error

Khalid_Rehan2 — Thu, 12 Dec 2024 11:28:31 GMT

Hello @Ryan.Paredez

It seems that the solution I posted does not apply to most cases.

I faced the same issue twice and the solution was to allow some policies on F5 loadbalancer related to CORS error.

It worked on one case, but I now have about 3 cases one of them F5 could not resolve it until now 😄

I will update the post once I resolve it.

Regards,

Khalid

Re: EUM - Browser violation error

iamryan — Thu, 12 Dec 2024 16:35:30 GMT

Hi @Khalid.Rehan,

Thank you for updating the thread and letting us know.