External access
The Jenkins charm requires access to the following domains to install Jenkins and its plugins:
jenkins-ci.orgupdates.jenkins-ci.orgjenkins.ioupdates.jenkins.io.mirrors.jenkins-ci.orgfallback.get.jenkins.ioget.jenkins.iopkg.jenkins.ioarchives.jenkins.iopkg.origin.jenkins.io.mirrors.jenkins.iowww.jenkins.io
Depending on the localisation, some region-specific external mirrors might also be used. You can find more information on the list of mirrors for Jenkins.
Some plugins can also require external access, such as github.com for the Github branch source plugin or an external Kubernetes cluster if you are using the Kubernetes plugin. Refer to the plugin’s documentation for more details.