Nagios Support Forum

Hi there!

I have successfully integrated nna with nagios xi, but in the host tab, Network traffic analysis, the graph is not shown, showing me the browser developer mode, the following error:

Access to XMLHttpRequest from origin has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

Can someone help me fix it?
Attachment screenshot

Thank you a lot
Regards

Hi nagmites,

I ran a test of this on my systems here without error. What version of Nagios XI and Network Analyzer are you using?

Also, have you made any changes to the Apache configuration files on either system? Are you using any proxies?

Thanks,
Benajmin

Hi!

I have tried with two environments:

NNA 2.4.1 Nagios 5.4.13
NNA 2.4.1 Nagios 5.7.5

In both the same problem.

Nothing in apache has been modified and no proxy is configured.

Regards

Hi @nagmites,

So after further review, we think this is an SSL issue. Do you have SSL enabled on Nagios XI as well? If one system is using SSL and the other system is not, Chrome will trigger this type of error.

Also, try adding the 'Allow Invalid Certificate' settings in the Nagios Network Analyzer Integration setup ( in the components section).

Let me know if that resolves the issue.

Benjamin

Also, here's our guide on configuring SSL in Nagios XI.

https://assets.nagios.com/downloads/nag ... s%20XI.pdf

Hi Benjamin:

SSL is set to both nna and nagios.
The problem persists.
The chart does not appear in the tab

Regards

If you go to Admin > System Settings > Security and check the box next to "Disable - Do not restrict pages from being opened in iframes from anywhere..." and click the Update Settings button does that fix it?

You can also try adding this to your NNA server's /etc/httpd/conf/httpd.conf:
Then restart apache on the NNA system:
Then check to see if XI now shows properly.

Hi there!

I have tried both options, but the problem persists, however the error has changed:

Access to XMLHttpRequest at 'https://vmnagiosna.trabajo.dom/nagiosna ... ip%2Cdstip' from origin 'https://nagiosxi-des.trabajo.dom' has been blocked by CORS policy: The 'Access-Control-Allow-Origin' header contains multiple values '*, *', but only one is allowed.

Regards

Try removing this line from your /etc/httpd/conf/httpd.conf on the NNA server and restart the httpd service:
Do you still get that CORS error in the console after that?

Hi there,

The indicated line has been removed and httpd has been restarted.
The error is the one that I attach.

Regards

Please create a ticket for this and include a link back to this forum thread so we can get a remote session setup:

https://support.nagios.com/tickets/

I can replicate the 'Access-Control-Allow-Origin' header contains multiple value issue when I add this to the NNA server:
Given that's it's saying multiple detected it should already be set and working so we'll need to debug on a remote.

Thank you!