Testing only your external firewall perimeter leaves internal lateral movement paths unexamined. A balanced infrastructure testing programme pairs external exposure testing with assumed-breach internal assessments.
Why Perimeter-Only Testing Leaves Blind Spots
If an attacker compromises a single endpoint via phishing or a stolen VPN session, perimeter firewalls no longer prevent lateral movement. Relying solely on external IP scans gives a false sense of security if flat internal VLANs or over-privileged service accounts allow rapid escalation to domain controllers.
Assumed-Breach Internal & Active Directory Paths
Nexa Cyber Security conducts internal infrastructure penetration tests using controlled assumed-breach scenarios. Starting from a representative user segment, engineers assess SMB signing enforcement, Kerberos delegation, certificate services configurations, local administrator reuse, and network segmentation controls protecting critical enterprise servers.
Production-Safe Execution and Deconfliction
Every infrastructure engagement begins with a formal scoping call establishing target IP subnets, excluded legacy equipment, maintenance windows, and named emergency contacts so testing validates resilience without disrupting live operations.
Infrastructure Penetration Testing UK
Explore how Nexa Cyber Security delivers this capability for UK organisations, or scope an engagement below.
