Welcome to Perennial Consultancy

Network Penetration Testing (VAPT) Service
in Singapore

Comprehensive Network VAPT Services, Simulating Real-World Cyber Attacks

Apply for Network VAPT under CSA CISOaaS grant of up to 70% 

Identifying security vulnerabilities across hybrid environments, local active directories, and enterprise architectures before malicious actors strike

 

What is a Network VAPT?

Network VAPT (Vulnerability Assessment & Penetration Testing) is a proactive security assessment that identifies vulnerabilities across your corporate network before attackers can exploit them.

Rather than relying solely on configuration reviews, we assess your infrastructure from an attacker’s perspective to uncover real-world security weaknesses.

Our assessments cover both on-premise and cloud environments, including servers, network devices, virtual machines, VPNs and remote access infrastructure.

Depending on your requirements, we can perform:

  • Vulnerability Assessment (VA) – Automated scanning to identify known vulnerabilities across your environment.
  • Penetration Testing (PT) – Manual testing to validate exploitable weaknesses, assess business impact and prioritise remediation.
Scope of Assessment can include

Internal vs External Network VAPT

Strategy for Hybrid and Local Networks

External Network Penetration Testing

Simulates an Internet-borne attack targeting your public-facing infrastructure, cloud environments, public IP ranges, firewalls and exposed corporate services to exploit perimeter weaknesses and gain unauthorized foothold.

Key areas assessed:

  • Exposed services and open ports
  • Email servers and mail security configuration
  • DNS misconfigurations and information leakage
  • Subdomain enumeration
  • Forgotten or shadow assets

Internal Network Penetration Testing

Operates inside your perimeter walls, evaluating what an attacker, rogue device or compromised account can achieve once inside the network boundary by simulating lateral movement to critical servers.

Key areas assessed:

  • Internal network segmentation 
  • Unpatched or end-of-life systems and services
  • Shared file systems and sensitive data exposure
  • Privilege escalation paths and lateral movement
  • Service misconfiguration and over-privileged accounts

Is Your Network Infrastructure Safe from these Risks?

Why Choose Perennial for Network Penetration Testing in Singapore

Our Key Differentiators in Network Penetration Testing

CSRO Licensed VAPT Provider

Licensed by CSA under CSRO and  onboarded as a CISOaaS VAPT provider, ensuring accountability and regulatory compliance.
Licence No CS/PTS/C-202606-336

CREST Certified

Our consultants hold industry certifications including CREST, CISSP and AWS, backed by over 20 years of practical cybersecurity and infrastructure experience.

Auditor-Ready Attestations with Proof

Standard pentests show what breaks. Positive Attestations show what held — backed by execution logs and evidence, providing strong proof for your auditors.

Our Testing Framework
Penetration Testing Execution Standard (PTES)

Scope

Defines rules of engagement such as scope, schedule, environment and boundaries

Recon

Leverage network footprinting to map perimeter, exposed subnets, services and potential entry points

Assess

Automated and manual tests to find weak protocols, misconfiguration and unpatched OS

Exploit

Align attack vectors with identified vulnerabilities to attempt lateral movements

Report / Retest

Interim and final reports - remediation guidance & walkthrough, including retests

FAQ's

Yes, eligible SMEs can apply for CISOaaS VAPT grant of up to 70%, cap at endpoint tier.

More details here.

Technically, any organization connected to the Internet requires a Network VAPT—it is the foundational baseline compliance auditors look for first. Today, this requirement spans both your physical office footprint and your modern cloud architecture:

  • External VAPT: Essential if you run internet-facing services (VPN gateways, remote desktops, email portals) to defend your outer perimeter against public threats.

  • Internal & Hybrid VAPT: Crucial if you host staff-accessible assets like local Active Directories and core databases, plus private cloud workloads sitting inside isolated VPCs.

The Hybrid Reality: Even if your cloud servers lack public IP addresses, they are not immune. An attacker gaining an initial foothold via phishing or a compromised employee device can easily move laterally into your private cloud subnets. Modern Network VAPT must evaluate on-premise infrastructure and private cloud networks as a single, unified architecture to eliminate these dangerous blind spots.

External penetration test is the right starting point if you haven’t tested before, or whenever your internet-facing footprint changes — new cloud deployments, opening a new office, acquiring a company, or launching a new service. 

An internal penetration test is essential if your organization hosts critical assets—such as Active Directory, core databases, or high-value servers—whether they sit on-premise or in the cloud. This assessment becomes critical immediately following a phishing incident or credential breach, after making significant changes to your network infra, or when you need to validate secure network segmentation between zones. Ultimately, mature organizations run both external and internal penetration tests annually: external to harden the perimeter, and internal to drastically limit the blast radius if that perimeter ever fails.

Our Vulnerability Assessment uses automated Nessus scanning to identify potential security gaps, which our team manually reviews to eliminate false positives.

A Penetration Test goes a step further by actively simulating real-world exploits to prove exactly how far an attacker could breach your defenses.

Choose a vulnerability assessment if you need a cost-effective network security scan to identify missing patches, eliminate false positives, and maintain baseline security hygiene. Opt for a network penetration test if you need to satisfy compliance standards (like MAS TRM, PCI) and want to see how real-world exploits could impact your business assets. For the best defense, use regular automated scans to find network weaknesses and an annual penetration test to validate your actual security posture against human adversaries.

No. We focus heavily on safe exploitation methods. All intrusive actions are mapped and scheduled precisely with your IT stakeholders beforehand. Our engineers continuously monitor target response metrics to preserve zero-downtime operational bounds.

Our report consists of:

  1. Executive Summary
    • Overview of assessment
    • Findings categorized by CVE / CWE ID
    • Attestation on areas you have done well
  2. Risk Register
    • Findings tracker
    • CVSS rating for severity
  3. Engagement scope
    • Scope of work, methodology and risk model used
  4. Detailed Findings
    • Issue details and background
    • Issue remediation
    • Attestation

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