IT Infrastructure & Network Security Audits
Evaluate the resilience of the network fabric connecting your offices, data centers, and remote workforce—from perimeter firewalls down to internal switching and directory services.
What We Examine
Enterprise networks evolve over years of branch expansions, vendor integrations, and emergency firewall changes. Over time, temporary 'any-any' rules become permanent, flat internal subnets allow unrestricted lateral movement, and legacy authentication protocols remain enabled on core infrastructure.
Elegant Infosec’s IT Infrastructure & Network Security Audit provides a rigorous architectural and technical examination of your network environment. We review topology design, firewall and router configurations, VLAN segmentation, remote access gateways, wireless security, and core directory infrastructure to ensure your network enforces least-privilege connectivity.
Why Organizations Engage Us
Flat internal network architectures
Insufficient internal segmentation allows a single compromised workstation to reach critical database servers, backups, or operational technology.
Firewall rulebase bloat and shadowed rules
Years of accumulated firewall changes create overly permissive rules, unused object groups, and unmonitored outbound traffic paths.
Multi-location & remote access exposure
Site-to-site VPNs, SD-WAN interconnects, and employee VPN gateways can introduce weak encryption, split-tunneling risks, or missing MFA.
Core directory & switching vulnerabilities
Misconfigured Active Directory trusts, unauthenticated Layer-2 switching ports, and weak SNMP/management plane controls expose core operations.
Technical Boundaries & Control Layers
Perimeter & Firewall Rulebase Architecture
- Ingress and egress filtering rules, overly permissive rules, and rule shadowing
- DMZ isolation, NAT/port-forwarding hygiene, and IPS/IDS policy tuning
- Management plane security (SSH/HTTPS administrative access, AAA/TACACS+/RADIUS)
Internal Segmentation & Routing Controls
- Inter-VLAN access control lists (ACLs) and separation of user, server, and guest zones
- Layer-2 security controls (802.1X/NAC, DHCP snooping, dynamic ARP inspection, STP protection)
- Routing protocol authentication and core/distribution switch hardening
Wireless, VPN & Remote Connectivity
- Enterprise Wi-Fi architecture (WPA2/WPA3-Enterprise, RADIUS authentication, rogue AP controls)
- Guest Wi-Fi captive portal isolation from internal corporate subnets
- Remote access VPN and site-to-site IPsec tunnel cipher suites and MFA enforcement
Active Directory & Core Network Services
- Active Directory tiering, Group Policy Objects (GPOs), and privileged group hygiene
- DNS, DHCP, NTP, and internal PKI certificate service security configurations
Examination Protocol
Analyze network diagrams and data flow boundaries
Examine high-level and low-level network diagrams, routing tables, VLAN schedules, and trust zone definitions across all locations.
Inspect firewall, router, and switch configurations
Analyze exported device configurations and firewall rulebases against vendor hardening guides and CIS Benchmarks.
Validate isolation across network zones
Conduct controlled reachability and path-analysis tests between guest, corporate, server, and management segments.
Deliver prioritized network hardening recommendations
Provide specific rule cleanup tables, VLAN re-segmentation blueprints, and device hardening scripts.
Evidence & Reporting Outputs
Network Security Architecture Assessment Report
Architectural evaluation of perimeter security, internal segmentation, remote connectivity, and single points of security failure.
Firewall & Device Configuration Audit Matrix
Line-item review of redundant, overly permissive, or unlogged firewall rules alongside switch and router hardening gaps.
Segmentation & Zero-Trust Roadmap
Practical engineering recommendations for isolating critical workloads, hardening Active Directory, and securing branch interconnects.
Referenced Security Frameworks
Configuration baselines for Cisco, Fortinet, Palo Alto, Juniper, and enterprise switching platforms.
Guidelines on Firewalls and Firewall Policy, and Zero Trust Architecture principles.
Evaluation of network controls, security of network services, and segregation in networks.
Common Procurement Questions
Do you require administrative credentials to our firewalls and switches?
Not necessarily. We can perform configuration audits using sanitized read-only configuration exports (`show running-config` or XML/JSON policy exports) generated by your network administrators, supplemented by guided screen-sharing walkthroughs.
Can you audit multi-location networks connecting branch offices?
Yes. We evaluate headquarters, data centers, branch offices, SD-WAN fabrics, and site-to-site VPN interconnects to ensure consistent security policies across every location.
How do you prevent network disruption during segmentation testing?
Reachability and port-matrix verification use low-bandwidth, non-intrusive probes calibrated with your network engineering team.
Start your security assessment.
WHAT ARE YOU MISSING?
Tell us what you need assessed. We’ll help define the scope and next steps.