What's this about?
Firewalls exist for a reason: security. However, in some structures, their configuration don't take into account the developers specific awareness and needs.
Most of the time, a workaround has been implemented (e.g. a Nexus or Artifactory for Maven dependencies), but when nothing's been done and the development teams urgently need a specific resource, the firewall becomes a hindrance rather than a help.
The first version of this tool was developed in such a context, and it has evolved since then. You can learn more on the project's information page.