What is a Firewall Ruleset Review?
A Firewall Ruleset Review provides a thorough, independent examination of your firewall configuration to identify issues that could leave your network vulnerable to a security breach.
Unlike dynamic network penetration testing alone, a ruleset review systematically inspects the underlying configuration files, access control lists (ACLs), and traffic policies. This process identifies structural weaknesses, redundant entries, and rule conflicts across enterprise vendors including Palo Alto Networks, Fortinet, Cisco, Check Point, pfSense, and cloud-native security groups.
Key Issues and Vulnerabilities Identified
Assessments meticulously analyse rulebases to uncover security flaws and operational inefficiencies. Core focus areas include:
Overly Permissive Access Controls
Detecting “ANY/ANY” rules, overly broad IP ranges, and unrestricted outbound egress policies that allow unauthorised lateral movement or data exfiltration.
Shadowed and Redundant Rules
Identifying rules that are unreachable or completely masked because a broader rule higher in the rulebase matches the traffic first, creating a false sense of security.
Orphaned and Unused Rules
Spotting legacy access permissions associated with decommissioned servers, obsolete applications, or past third-party vendor integrations that have zero traffic hits.
Misconfigured Network Address Translation
Uncovering unused static translations, overlapping DNAT rules, and improper port forwarding configurations that expose internal subnets directly to the internet.
Insecure Administrative Interfaces
Flagging management access permitted from untrusted zones, deprecated encryption protocols (such as HTTP or Telnet), and weak multi-factor authentication enforcement for administrative logins.
A CREST-Accredited Methodology
Because firewall architectures span physical appliances, virtual gateways, and cloud firewalls, reviews are tailored to match each organisation’s network topology. Assessments evaluate configurations against CIS benchmarks, vendor hardening guides, and regulatory mandates such as PCI DSS Requirement 1 and ISO 27001.
As a CREST-accredited service provider, Cyber Security Specialists ensures assessments are delivered by certified ethical hackers and security engineers with recognised technical certifications, such as OSCP and CREST. All reviews adhere strictly to industry-recognised standards.
Comprehensive Reporting and Remediation
After the assessment, we deliver a detailed, actionable report. This documentation classifies the risks to overall cybersecurity, prioritises vulnerabilities for remediation, and provides a clear, optimised rulebase specification. Network and firewall engineering teams receive guidance to remove dangerous rules, consolidate objects, and harden network perimeters without disrupting legitimate business traffic.
Secure Network Firewalls Today
Penetration testing and configuration reviews help organisations identify and fix vulnerabilities before an attacker can exploit them, reducing risk and protecting internal and perimeter assets.
To discuss your Firewall Ruleset Review requirements, please contact a member of the team by emailing info@cybersecurityspecialists.co.uk or calling 0161 706 0244.
