You must enable private mode if your GitHub Enterprise Server instance is publicly accessible over the Internet. In private mode, users cannot anonymously clone repositories over git://. If built-in authentication is also enabled, an administrator must invite new users to create an account on the instance. For more information, see "Using built-in authentication."
Warning: If you add an image attachment to a pull request or issue comment, anyone can view the anonymized image URL without authentication, even if the pull request is in a private repository, or if private mode is enabled. To keep sensitive images private, serve them from a private network or server that requires authentication.
With private mode enabled, you can allow unauthenticated Git operations (and anyone with network access to your GitHub Enterprise Server instance) to read a public repository's code on your instance with anonymous Git read access enabled. For more information, see "Allowing admins to enable anonymous Git read access to public repositories."
- From an administrative account on GitHub Enterprise Server, click in the upper-right corner of any page.
- In the left sidebar, click Management Console.
- In the left sidebar, click Privacy.
- Select Private mode.
- Under the left sidebar, click Save settings.
- Wait for the configuration run to complete.