Infrastructure
What is Internet-facing?
Reachable from the public internet rather than only from inside the organisation network.
An internet-facing system is reachable from the public internet rather than only from inside the organisation's network. Web servers, VPN gateways, mail servers, file transfer servers and remote access portals are typical examples.
Internet-facing systems are where most initial access happens, because anyone in the world can probe them. When a vulnerability is announced, the first question is whether the affected product is internet-facing in your environment.