Generate Jenkins API Token. Refer Jenkins API Token
Skip this step If you plan to use URL based token authentication i.e. Trigger builds remotely Option in Job Configuration.
Required Jenkins API Token If CSRF Protection is enabled in Configure Global Security.
Go to Jira Settings > Apps > Jenkins Servers > Click Add
Set CSRF Crumb Issue to TRUE if your Jenkins master is enabled CSRF Protection in Configure Global Security.
Jenkins Username and API token is Optional
If you plan to use URL based token authentication i.e. Trigger builds remotely Option in Job Configuration.
If Jenkins master has read access to everyone
If CSRF Protection is not enabled
Go to Browser Developer Tools > Console log
Make sure your Jenkins URL set correctly in Configure System.
Make sure your Jenkins IP / Host accessible on Jira Host.
Our App Elastic IP for whitelisting on your Jenkins environment. (Optional)