Attack Surface

Attack surface has an internal component (user accounts, endpoints, misconfigurations, standing access) and an external one (internet-facing services, DNS records, cloud storage, exposed APIs) — and the general principle behind reducing it is simple even though execution rarely is: a smaller surface is easier to defend than a larger one, because there's less of it to monitor and less of it that can go wrong.

Attack surface tends to grow silently rather than all at once — a new SaaS integration added for one project, a test server nobody remembered to decommission, an old contractor account never disabled. Each addition is small on its own, which is exactly why periodic rediscovery (not a one-time assessment) is necessary to keep the picture current.

For an MSP specifically, every additional remote-access tool, open port, or standing integration added to a client environment is new attack surface on that client's behalf — a legitimate, concrete argument for consolidating onto fewer, better-secured tools instead of layering on point solutions that each add their own exposure.