Firewall Configuration Review & Audit
Clean the rulebase, harden the device. Expert firewall review for Palo Alto, Fortinet, Check Point, and Cisco — ANY/ANY rule remediation, WAF assessment, and PCI-DSS compliance mapping.
Rules · Device Config · Compliance
Full firewall assessment from rulebase analysis and device hardening through PCI-DSS compliance mapping and WAF configuration review.
Firewall Rule Optimization
Comprehensive analysis of your firewall rulebase — identifying overly permissive rules (ANY/ANY), shadowed rules that are never matched, unused objects consuming overhead, and rule ordering issues that create coverage gaps.
- ANY/ANY rule identification and remediation
- Shadowed and redundant rule cleanup
- Unused object and address group removal
- Rule ordering and specificity optimization
Firewall Configuration Audit
Hardening the firewall itself — not just the rules. We review OS version and patch status, management plane security, logging and alerting configuration, and high availability setup against vendor security hardening guides.
- OS version, patch, and firmware review
- Management plane security (SSH, HTTPS, RBAC)
- Logging, SNMP, and syslog configuration
- HA/failover configuration review
Regulatory Compliance Review
Mapping your firewall policy against compliance mandates — PCI-DSS firewall requirements for cardholder data environments, change management process verification, audit trail completeness, and policy documentation review.
- PCI-DSS firewall requirement mapping
- Change management and audit trail review
- Policy version control verification
- Firewall documentation completeness check
Most Firewalls Are Too Permissive and Too Complex to Manage Safely
Firewall rulebases grow organically over years of operational changes — rules are added for specific projects, never removed when they're no longer needed, and the cumulative result is a rulebase too large and complex for any human to fully understand. This creates security gaps that are invisible without dedicated analysis tooling.
Our firewall review systematically maps every rule, identifies the ones that are permissive, redundant, or unreachable, and delivers a specific, ordered cleanup plan that reduces your attack surface without interrupting business operations.
Rulebase Reduction
Eliminating unused rules and objects to reduce complexity and management overhead.
Segment Bypass Detection
Finding rules that effectively bypass your intended network segmentation model.
Unpatched Firewall OS
Identifying firmware versions with known CVEs that attackers use for network compromise.
Logging Gaps
Ensuring all security-relevant firewall events are logged, alerted, and retained.
5-Phase Firewall Review
From rulebase export and permissive rule analysis through shadow rule detection, device hardening review, and the compliance-mapped remediation runbook.
Rulebase Export & Initial Review
We obtain firewall rulebase exports in vendor-native format and run automated analysis tools alongside manual review. We map the rule set to your documented network segmentation design to identify intended-vs-actual policy gaps.
Permissive Rule & ANY/ANY Analysis
Systematic identification of overly permissive rules — ANY source, ANY destination, ANY service — along with rules with wildcard service definitions, excessively broad address ranges, and rules that effectively bypass segment boundaries.
Redundancy & Shadow Rule Analysis
Identifying shadowed rules (rules that can never be matched because a broader rule above them captures traffic first), duplicate rules, and unused address objects and service groups that bloat the rulebase and increase management complexity.
Device Configuration Hardening Review
Reviewing the security configuration of the firewall device itself — management access controls, OS and firmware version, logging completeness, SNMP community strings, admin account policies, and HA failover security design.
Compliance Report & Remediation Runbook
A findings report with severity-rated rule-by-rule and device-level findings, a PCI-DSS compliance mapping table, and a prioritized remediation runbook with specific rule changes, ordered to minimize operational disruption.
Full Firewall Security Coverage
From ANY/ANY rule detection and shadow rule analysis through device hardening, WAF review, PCI-DSS mapping, and migration support.
ANY/ANY Rule Detection
Identifying firewall rules that allow all source IPs to connect to all destinations — the most common and highest-impact misconfiguration found in enterprise firewall rulebases.
Shadow & Redundant Rules
Detecting rules that can never be matched due to broader rules above them, and exact duplicate rules — both of which create rulebase complexity without adding any security value.
Management Plane Security
Verifying that firewall management access (SSH, HTTPS, API) is restricted to management networks, uses strong authentication, and is logged — preventing attackers from using the firewall as a pivot point.
WAF Configuration Review
Security review of Web Application Firewall configurations — Cloudflare WAF, AWS WAF, Azure Front Door, or on-premises WAFs — covering rule coverage gaps, bypass conditions, and logging completeness.
PCI-DSS Firewall Compliance
Mapping your current firewall policy against PCI-DSS Requirements 1 and 2 — firewall and router configuration standards — and identifying specific gaps that would result in audit findings.
Vendor Migration Support
If you are migrating firewall policies between vendors (e.g. Cisco ASA to Palo Alto), we review the migrated rule set for coverage gaps, translation errors, and security regressions introduced by the migration process.
Firewall Reviews That Deliver Operational Value
We don't just list problems — we deliver an ordered runbook that your network team can execute sequentially, with business-critical traffic verified before permissive rules are removed.
Vendor-Agnostic Expertise
We review firewalls from all major vendors — Palo Alto PAN-OS, Fortinet FortiGate, Check Point, Cisco Firepower, and Juniper SRX — using vendor-specific hardening guides and best practices for each.
Rulebase Complexity Reduction
Our primary objective is not just finding security gaps — it's simplifying the rulebase. Fewer, more specific rules are more secure and easier to manage. We target a meaningful reduction in rulebase size.
WAF Coverage
We assess both traditional NGFW and web application firewall configurations — cloud-native (AWS WAF, Cloudflare) and on-premises — in a single unified engagement.
Operational Continuity
Our remediation runbook is ordered to minimize operational disruption — we sequence rule changes to allow business-critical traffic to be verified before removing broad permissive rules.
Firewall Platforms We Review
Frequently Asked Questions
Everything you need to know about firewall configuration reviews and rule optimization
Optimise Your Firewall — Before Attackers Exploit It
A complex, overpermissive rulebase is a liability. Our firewall review identifies the rules that are silently bypassing your segmentation model and delivers an operational runbook to fix them safely.
Get in Touch
Ready to secure your future? Reach out to us for a consultation.