Enterprise networks accumulate risk over time. Firewall rules added for projects that ended three years ago. VLANs that were meant to be temporary. Default credentials that were meant to be changed after deployment. Architecture hardening eliminates the debt that attackers exploit.
Our hardening engagements are rooted in findings from real penetration tests, CIS Benchmark controls, and NIST SP 800-207 zero-trust principles — not generic checklists. Engagements start at $10,000 — scoped and quoted before any commitment.
Six domains where most enterprise environments carry the highest residual risk — and where hardening produces the most measurable reduction in attack surface.
Enterprise firewall rule bases accumulate technical debt over years of hasty changes, legacy migrations, and undocumented exceptions. We audit every rule against business justification, remove redundant and legacy entries, establish documented deny-by-default posture, and create a rule change management process that prevents future drift. Rules without a documented owner, ticket reference, or expiration date are flagged for removal.
Flat networks are attacker playgrounds. We design and implement VLAN-based segmentation that creates meaningful security boundaries: separating user traffic from server traffic from OT/IoT devices from management interfaces. Microsegmentation extends this to east-west traffic control within segments, enforcing that compromising one workstation does not grant lateral movement to adjacent systems.
Zero trust replaces implicit network trust (you are inside the firewall, therefore trusted) with explicit identity verification for every access request. We implement identity-based access controls, MFA enforcement at the network layer, least-privilege policy for all administrative access, and privileged access workstations (PAWs) for network and security management. Every access decision is logged and auditable.
Self-signed certificates, expired certificates, and weak cipher suite configurations are endemic in enterprise environments. We implement an internal certificate authority, establish certificate lifecycle management processes, enforce TLS 1.2/1.3 minimum across all services, disable weak ciphers and key exchange algorithms, and configure certificate transparency monitoring to detect unauthorized issuance.
CIS Benchmark-aligned hardening for Cisco IOS, Meraki, Windows Server, and Linux. We establish a documented baseline, measure current deviation, implement remediation, and deploy continuous compliance monitoring that alerts on configuration drift — whether from unauthorized change or software update reversion.
A vulnerability management program without enforcement is just a spreadsheet. We implement patch prioritization based on CVSS score, exploit availability (EPSS), and asset criticality — ensuring Critical and High severity patches reach production within your defined SLA. We integrate with your existing patch management tooling or deploy lightweight agent-based scanning.
Zero trust is frequently misrepresented as a product category. It is an architectural model defined by NIST SP 800-207 — a set of principles that guide how access decisions are made, regardless of which vendor products you use. Here is what each principle means in practice.
Every access request — regardless of source network — must be authenticated, authorized, and continuously validated. Traditional perimeter security grants implicit trust to authenticated VPN sessions and internal network traffic. Zero trust treats every request as originating from an untrusted network.
MFA for all remote and privileged access, device health attestation, continuous session monitoring with anomaly-based revocation.
Access rights are scoped to the minimum required for the specific task, time-limited where possible, and expanded through explicit just-in-time (JIT) provisioning rather than permanent broad permissions. Service accounts are scoped to specific resources and rotated regularly.
Role-based access control (RBAC) review, privileged identity management (PIM), time-limited administrative sessions, service account least-privilege audit.
Design controls assuming that the perimeter has already been breached and an attacker is moving laterally inside the network. This drives investment in lateral movement prevention, logging and detection, micro-segmentation, and blast radius reduction — the controls that matter most in a real incident.
Network segmentation to contain lateral movement, complete logging of east-west traffic, anomaly detection for credential abuse, incident response runbook coverage for lateral movement scenarios.
The standard industry model separates the team that finds vulnerabilities from the team that remediates them. The result: detailed pentest findings that your internal team struggles to implement without the contextual knowledge that came from the assessment itself.
At Fortress, the offensive security team that conducted the penetration test works directly with the architecture team that implements the hardening. When we say “the segmentation between VLAN 10 and VLAN 20 can be bypassed via the management interface,” we also know exactly how to close that gap — because we have already modeled the full architecture.
Every finding from the pentest report is translated into a concrete hardening action with implementation guidance, not just a CVE reference.
After hardening is applied, we validate that the remediation is effective by retesting the specific attack vectors identified in the pentest — not just reviewing configuration changes on paper.
Every hardening engagement produces a complete documentation package — for your engineering team, your leadership, and your auditors.
Full documentation of every hardening action taken: the finding, the risk, the remediation applied, and the validation method. Written for both your security team and auditors.
A complete, line-by-line configuration comparison showing the exact changes made to every modified device — with change rationale documented for each entry.
Updated physical and logical topology diagrams reflecting the post-hardening architecture, VLAN assignments, security zone boundaries, and trust relationships.
A structured report mapping your device configurations against applicable CIS Benchmarks — with pass/fail status for each control and remediation priority for remaining gaps.
A complete evidence package for auditors: screenshots, configuration exports, test results, and attestation statements confirming the remediation work performed and validated.
A vulnerability report sitting in a folder does not reduce your risk. Let us help you turn findings into implemented controls — with documentation your auditors can accept as evidence.
You may also need