While Accessing Jira from external system getting errors

[Krupakar]

Using the the root services of Jira, trying to register with external system.

Once root services details are entered in external system and submitted, authentication window is getting blocked (i.e. iframe is not loading)

Below is the error message in console window of Chrome Browser : Refused to display 'http://ctsc00429164201.cts.com:8070/rest/jirarestresource/1.0/oauth/approveKey?key=f34e0e6a-0ff8-490c-9438-edc96f665583' in a frame because an ancestor violates the following Content Security Policy directive: "frame-ancestors 'self'".

Attaching the images and log file.

[Andy Heinzer]

Are you following the steps in this guide: https://developer.atlassian.com/server/jira/platform/oauth/

If not, I would recommend trying to follow all the steps here.  In order to use OAuth as the authentication means to make such rest calls, you are going to need to create an application link, and then 'do the oauth dance'.