Publish IP range for gitlab-ce update repository servers.
Description
(Include problem, use cases, benefits, and/or goals) We host several Ubuntu gitlab-ce servers behind a strict firewall. Updating them is difficult if we don't know what IP addresses we should expect them to need to talk to. Running a dns lookup of https://packages.gitlab.com does not seem to provide all needed addresses and even if it did, we want to know that the addresses we we find are truly used by gitlab and not some malicious third party.
Proposal
Create a page on gitlab.com were you publish IP range for gitlab-ce update repository servers.
Links / references
For a good example of what I think would be helpful, github keeps this site up to date:
https://help.github.com/articles/github-s-ip-addresses/
Similar issues were posted here:
https://gitlab.com/gitlab-com/support-forum/issues/221
https://gitlab.com/gitlab-com/infrastructure/issues/434
but they were about gitlab.com specifically and they were not resolved. The page I am proposing could solve both problems.