This prevents devices with a source IP address outside of the allowed IP
addresses from connecting to the target location. This is useful for
internal-only locations, in case people make an attempt to directly
connect by modifying their `/etc/hosts` file or custom DNS to bypass the
lack of internal domains on public DNS.
Rather than performing fine-grained commits to catch up with the website
configuration files, just update the entire file in a single commit.
While this is not the typical way of updating files, the changes can be
mostly seen via the website configuration files' commits, and this
prevents becoming confusingly out-of-sync with the other configuration
files.
This is required by Google for their HSTS preloading service as many
people still use this legacy subdomain rather than the bare domain to
connect to websites.
I have switched to a clearer naming convention for my systems. This
commit moves the directory and file locations to reflect that change.
Additionally, system XB-00-01 has replaced the host OS (XB-00-00) as a
virtual machine.
