Network Penetration Testing in Australia: What's Covered, What It Costs and When You Need It

Network penetration testing is a human-led, authorised attempt to break into your organisation's networks the way a real attacker would: from the internet (external), from inside after a foothold (internal), and through Active Directory where that is how your people and servers authenticate. At Aussie Pentest, human-led network engagements start from $5,000 + GST for an external test of up to 25 IPs, $12,000 + GST when external and internal are combined, and $20,000 + GST for full-scale work that can include social engineering. An analyst-reviewed automated assessment starts from $80 if you need a cheaper first baseline.

This guide covers what a network pentest tests, how external and internal scopes differ, Australian costs, when SMBs need one, how it differs from a vulnerability scan, and how it supports Privacy Act, Essential Eight, CPS 234 and SOCI conversations. For starting-position detail, read our external vs internal penetration testing guide alongside this one.

What is network penetration testing?

A network penetration test is a time-boxed, authorised security assessment in which a tester tries to reach, abuse and move across your network infrastructure to prove what an attacker could actually do. It goes beyond a list of missing patches. The goal is evidence: which weaknesses are real, how serious they are, and what to fix first.

A network in scope might include:

▸Public IP ranges, firewalls, VPN gateways and remote access portals
▸Internet-facing servers, mail gateways and management interfaces
▸Internal LAN/VLAN segments, workstations and file servers
▸Active Directory (on-premises or hybrid) and related identity systems
▸Cloud-adjacent edges such as jump hosts and hybrid connectors

What it is not

It isn't a vulnerability scan, a configuration review alone, or a guarantee your network will never be breached. A scanner can list open ports and known CVEs; it can't reliably show whether those findings chain into domain admin, ransomware reach, or access to backups and customer data. Those paths need a person who understands how your network is meant to work. For the full comparison, see our guide to vulnerability assessment vs penetration testing.

Why do Australian businesses need network penetration testing?

Most serious ransomware and lateral-movement stories start with a network foothold, and customers, insurers and regulators increasingly expect proof that someone has tested how far that foothold can go. Four drivers come up again and again.

Your network is how attackers reach personal information

The Office of the Australian Information Commissioner (OAIC) received 1,205 data breach notifications in the 2025 calendar year, the highest number since the Notifiable Data Breaches scheme began in 2018. Of those, 716 were attributed to malicious or criminal activity. Health service providers were the most affected sector with 225 notifications, followed by financial services with 157.

If your business is covered by the Privacy Act, Australian Privacy Principle 11 requires you to take reasonable steps to protect the personal information you hold. Compromised VPN gateways, flat internal networks and weak Active Directory hygiene are exactly how personal information gets reached in practice. Our guide to Privacy Act cyber security requirements explains where testing fits.

Attackers still go after the edge — then move inside

The Australian Signals Directorate's (ASD) Annual Cyber Threat Report 2024–25 lists "exploit public-facing application" as a technique in 10% of the industry incidents it responded to. The same report notes the average self-reported cost of cybercrime per report was $56,600 for small businesses and $97,200 for medium businesses. Edge devices, remote access and identity are still high-value targets; once inside, the question becomes how quickly an attacker can escalate and move.

Clients, insurers and tenders ask for network evidence

Enterprise and government buyers often ask when your network was last tested, and whether that covered external exposure, internal movement, or both. A current report from an independent tester answers that faster than a policy document. Cyber insurers commonly ask about perimeter testing and, for denser environments, internal controls as well — see what Australian insurers actually require.

Australian guidance expects you to patch and verify the perimeter

ASD's Essential Eight maturity model expects patches for online services and internet-facing servers and network devices within 48 hours when a vulnerability is critical or a working exploit exists, and within two weeks otherwise (even at Maturity Level One). An external network pentest checks whether that is actually happening. An Essential Eight assessment measures control maturity; a network pentest tests whether those controls hold under attack.

What does a network penetration test cover?

A good network test covers the attack surface you expose to the internet, then (when scoped) the paths an attacker would take once inside — including Active Directory, if that is how your organisation authenticates. The exact mix of external, internal and AD work should match your risk, not a generic package name.

External network testing

An external pentest maps what you expose to the internet and then tries to exploit it. In practice that usually means:

Reconnaissance. Domains, subdomains, IP ranges and forgotten assets (old staging sites, test servers, legacy mail gateways).
Service discovery. What is listening, and what version it appears to be.
Exploitation attempts. Unpatched edge devices, weak or default credentials, exposed admin panels, and authentication weaknesses on remote access.
Validation. Proving impact with evidence rather than listing theoretical CVEs.

Typical targets include public IP addresses, firewalls, VPN appliances, remote desktop gateways, email and web servers, and misconfigured cloud or hybrid edges.

Internal network testing

An internal pentest starts inside your network — often with a standard user account or a device on the LAN or VPN — and tries to escalate privileges, move laterally and reach the systems that would hurt most. Common focus areas include:

▸Workstations, servers and file shares
▸Flat vs segmented network design
▸Management interfaces, printers and monitoring platforms
▸Credential reuse, cleartext protocols and relay opportunities
▸Paths to backups, finance systems and customer data stores

Active Directory (when it is in scope)

For many Australian SMBs, Active Directory (or hybrid Entra ID + on-prem AD) is the control plane for the whole network. When AD is in scope, testers typically look for over-privileged accounts, weak password hygiene, stale admins, insecure legacy protocols, and attack paths that lead to domain compromise. That work is usually part of an internal engagement, not a separate product name.

How external and internal fit together

	External network pentest	Internal network pentest
Starting point	Public internet, no credentials	Inside the LAN/VPN, often as a normal user
Question answered	Can someone get in from outside?	If they are already in, how far can they go?
Typical findings	Exposed services, edge CVEs, weak remote access	Privilege escalation, lateral movement, AD paths
Often first for	First-time testing, insurance questionnaires	AD environments, ransomware risk, sensitive data

Most SMBs start external, then add internal once staff devices, file servers or Active Directory hold data that matters. Our external vs internal guide goes deeper on which to do first.

How is a network pentest different from a vulnerability scan?

An automated scan finds known issues quickly and cheaply. A human-led network pentest proves which issues are exploitable, finds chaining and privilege-escalation paths, and shows real business impact. Both have a place.

	Automated security assessment	Human-led network pentest
Aussie Pentest price	$80 to $2,000 AUD	From $5,000 + GST
Turnaround	24 to 72 hour SLA, depending on tier	Typically 5–10 business days
Strongest at	Known CVEs, misconfigurations, common exposure	Exploit chaining, AD attack paths, lateral movement
Human input	Analyst reviews and validates every report	Human-led, with proof-of-concept on every critical finding
Best for	A first baseline, checks between tests	Evidence for insurers, clients, tenders and remediation priority

Our automated security assessment uses the same toolchain our pentest team uses, and an analyst reviews every report before it reaches you. It's a strong starting point, but it isn't a penetration test, and you shouldn't present it to a client or insurer as one. Our guide to automated vs manual penetration testing covers the trade-off in more depth.

How much does network penetration testing cost in Australia?

At Aussie Pentest, human-led network testing starts from $5,000 + GST for an external engagement of up to 25 IP addresses, $12,000 + GST when external and internal are combined (up to 50 IPs, and often 2–3 web apps), and $20,000 + GST for full-scale work that can include social engineering. Every engagement is fixed-fee and scoped in writing before testing starts. All prices are AUD + GST, and international clients are GST-free.

Tier	From	What's included
Basic	$5,000 + GST	External network test of up to 25 IP addresses, with a detailed report, risk rating and remediation recommendations
Standard	$12,000 + GST	External and internal network test, up to 50 IPs and 2–3 web applications, with an executive summary and debrief session
Advanced	$20,000 + GST	Full-scale test across external and internal networks, web applications and APIs, plus social engineering

Every tier includes a written scope document, a severity-ranked report and proof-of-concept evidence on every critical finding, and is typically delivered in 5–10 business days. Retest confirmation is included, so you have documented proof that your fixes hold.

Not ready for a human-led engagement? Our automated tiers on the pricing page run from $80 for one target to $2,000 for 10+ targets including APIs.

What changes the price of a network test

▸IP and host count. More public IPs and internal hosts mean more discovery and validation time.
▸External only vs external + internal. Adding an internal foothold and AD paths roughly doubles the work for many SMBs.
▸Active Directory complexity. Hybrid AD, trusts and legacy protocols add depth.
▸Segmentation and sites. Multiple offices, VPNs and cloud interconnects expand the attack surface.
▸Add-ons. Social engineering, wireless, and related web/API apps change the package — see our web application and API guides.

For the wider picture, see penetration testing costs for SMBs in Australia.

How do you scope a network penetration test?

Scope by risk and starting position, not by a vague request for "a pentest." List what is internet-facing, what sits inside, where identity lives, and what would hurt most if an attacker reached it. A clear scope keeps the price fixed and the findings relevant.

List public IP ranges and domains. Include forgotten staging, old VPN portals and third-party edges you still own.
Decide external, internal, or both. Most first engagements start external; add internal when AD, file servers or ransomware risk justify it.
Flag Active Directory and identity. Say whether on-prem AD, hybrid Entra ID, or both should be in scope.
Name critical assets. Domain controllers, backups, finance systems, EHR/CRM databases and admin jump hosts.
Agree the rules of engagement. Testing windows, contacts, anything off limits, and how critical findings are escalated during the test.
Confirm authorisation. You must own the network or have written permission to test it. Cloud and MSP-managed segments need clear boundaries.
Choose the testing approach. Grey box usually suits SMBs best. Our comparison of black box vs grey box vs white box testing explains the trade-offs.

Our penetration testing preparation checklist covers the logistics in detail.

When do you need a network penetration test?

Test when your internet edge or internal network has changed, when someone is asking for evidence, and on a regular cadence if you run Active Directory or hold sensitive data. Common triggers:

▸Opening (or never independently testing) VPN, RDP, firewall or remote-access infrastructure
▸Moving offices, adding sites, or connecting cloud and on-prem networks
▸Standing up or changing Active Directory / hybrid identity
▸An enterprise sale, tender or MSP client asking for a recent network pentest
▸A cyber insurance renewal that asks about perimeter or internal testing
▸After a security incident, once the fix is in, to confirm it holds
▸Preparing for Essential Eight uplift or Privacy Act "reasonable steps" evidence

Annual testing is a common baseline, but change matters more than the calendar. See how often to get a penetration test.

How does network testing support Australian compliance?

A network pentest won't make you compliant with anything on its own, but it's strong evidence that your perimeter and internal controls work and that you've taken reasonable steps.

▸Privacy Act (APP 11) and the NDB scheme. Reasonable steps include technical measures. A network test report shows you've checked how attackers could reach personal information.
▸Essential Eight. Patching internet-facing services and devices and restricting admin privileges are core themes. An Essential Eight assessment measures maturity; a network pentest stress-tests whether those controls hold.
▸APRA CPS 234. If you're APRA-regulated or supply an APRA-regulated entity, independent testing is a recurring expectation. See our CPS 234 penetration testing guide.
▸SOCI Act. Critical infrastructure entities have risk-management and incident obligations under the Security of Critical Infrastructure Act. Network testing can support how you validate controls, but it is not a substitute for your SOCI program, and requirements vary by sector.
▸ISO 27001 and SOC 2. Our reports map findings to these control themes where relevant. That helps your auditor, but it isn't certification.

What should a network pentest report include?

You should get a report your IT team can fix from and your board can read: an executive summary, risk-ranked findings, proof, clear fixes and a retest. Every Aussie Pentest report includes:

Executive summary. One page, board-ready and jargon-free.
Risk-ranked findings. CVSS-scored and ordered by how an attacker would exploit them.
Proof-of-concept evidence. Screenshots and reproduction steps.
Plain-English remediation. Specific fix instructions for each finding.
Compliance mapping. ISO 27001, Essential Eight and SOC 2, where relevant.
Retest confirmation. Verification that your fixes actually work.

If we can't prove it, it doesn't ship. See what a penetration testing report includes.

Frequently asked questions

Do we need both external and internal network testing?

Not always. Many SMBs start with external only. Add internal when you have Active Directory, sensitive data on internal shares, or ransomware as a top business-continuity risk. Our external vs internal guide helps you decide.

How long does a network penetration test take?

Our human-led engagements are typically delivered in 5–10 business days from kickoff, depending on scope. Automated assessments are delivered within a 24 to 72 hour SLA, depending on the tier.

Will testing disrupt our production network?

Testing is designed to be careful, but any live assessment carries some risk. Agree windows, exclusions and an escalation contact before kickoff. Destructive techniques are not used without explicit written approval.

Does a network pentest include web apps and APIs?

Only if you scope them. Standard and Advanced tiers can include web applications alongside network testing. See our web application and API guides for dedicated coverage.

Will a network pentest satisfy our insurer or client?

It's often the evidence they're after, but requirements vary and acceptance is their decision, not ours. Check whether they want external only, external plus internal, or a specific methodology before you scope.

The bottom line

Network penetration testing tells you what an attacker could really do with your perimeter and — when scoped — your internal network and Active Directory, not just which known issues a scanner can spot. For Australian businesses, it's one of the clearest ways to show reasonable steps under the Privacy Act, support Essential Eight uplift, and answer client, tender and insurer questions with evidence. Aussie Pentest's human-led network engagements start from $5,000 + GST, with combined external and internal from $12,000 + GST, and an analyst-reviewed automated assessment from $80 if you need a baseline first.

Not sure which fits? Book a 1-on-1 call and we'll help you scope your network with a fixed-fee quote. Explore our penetration testing services or compare options on our pricing page.

Sources

This article is general information only, not legal or compliance advice. Prices are current as of October 2026 and regulatory references were checked in October 2026. Check your own situation with a qualified adviser, and only test systems you own or have written permission to test.