I was trying to install Jenkins to a totally isolated environment, but Jenkins requires internet connection to certain domains to download the initial plugins.
Here is the list of the domain that you need an access at least for initial setup. It may change by region and I am located in East Coast
- https://ftp-chi.osuosl.org/pub/jenkins/
- https://ftp-nyc.osuosl.org/pub/jenkins
- Index of /download
- *.jenkins.io
Thanks for all your sharings.