Everything here is my opinion. I do not speak for your employer.
$ git push gh master
Address 220.127.116.11 maps to github.com, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT!
Aw, you're so cute. Trying to implement security using the DNS protocol in 2014.
Try Tailscale: mesh networking, centralized administration, WireGuard.