Firewall Hardening & Network Security Optimisation

Strengthened perimeter security and improved network security visibility for an organisation operating across hybrid cloud environments and multiple branch locations.

The project focused on improving firewall security, reducing unnecessary exposure, strengthening network segmentation, and enhancing monitoring and threat detection capabilities across corporate and cloud-connected infrastructure.

Challenges

  • Outdated firewall configurations and excessive open ports

  • Limited visibility across network traffic and security events

  • Weak network segmentation increasing lateral movement risk

  • Inconsistent VPN and remote access security controls

  • Compliance requirements for ISO 27001 and NIST standards

Security Improvements Delivered

  • Conducted firewall configuration and ruleset reviews

  • Removed redundant and overly permissive firewall rules

  • Strengthened firewall hardening and administrative security controls

  • Enabled advanced threat protection and intrusion prevention features

  • Implemented segmented network zones and access controls

  • Strengthened VPN and remote access security with MFA

  • Integrated firewall monitoring with Microsoft Sentinel

  • Improved network security alerting and visibility

  • Delivered firewall management guidance and operational documentation

Technologies & Security Areas

  • Firewall Hardening

  • Network Security Optimisation

  • Intrusion Prevention Systems (IPS)

  • Microsoft Sentinel

  • Azure Firewall & Network Security Groups (NSGs)

  • Hybrid Cloud Security

  • VPN & Remote Access Security

  • Network Segmentation

  • Security Monitoring & Alerting

  • ISO 27001 & NIST Alignment

Results & Outcomes

  • Reduced unnecessary network exposure and firewall risks

  • Strengthened network segmentation and access control security

  • Improved visibility across network traffic and security events

  • Enhanced detection of suspicious network activity

  • Improved compliance alignment with ISO 27001 and NIST standards

  • Reduced operational overhead through improved monitoring and automation

  • Strengthened overall perimeter defence and cyber resilience