What is Penetration Testing?
Penetration Testing is an authorized, simulated attack against a company's systems, applications, or staff, carried out by security professionals to find weaknesses that a real attacker could use. Unlike an automated scan, a penetration test involves a person attempting to chain findings together and reach something valuable, then documenting exactly how they did it and what would have stopped them.
Tests are scoped by target. An external test looks at what is reachable from the internet: the public website, email infrastructure, VPN gateways, and cloud services, along with information about the company and its staff that is publicly available. An internal test assumes the attacker already has a foothold and measures how far they can move. Application and source code tests examine custom software for flaws such as injection, broken authentication, or insecure data handling. Social engineering tests measure how staff respond to phishing. The deliverable is a report that ranks each finding by severity, with evidence and specific remediation steps.
For a small or mid-sized business a penetration test answers a question no policy document can: what would happen if someone tried? It surfaces the forgotten server and the shared password that nobody thought to mention. Cyber insurance carriers and enterprise customers increasingly ask for test results, as do frameworks such as PCI DSS and SOC 2. The scope should match the business; a company with a public website and Microsoft 365 needs a different test than one that ships its own software.
NetSys offers a free Tier 1 external penetration test to any business. It covers the public website and other internet-facing systems, exposure in public records, and the likelihood that staff can be phished, and it ends with a written findings report. A Tier 2 source code penetration test examines a company's own application code inside an isolated sandbox and is quoted per codebase. Details of both tiers are on the NetSys penetration testing service page.
Why it matters for a small business
Every owner believes their systems are reasonably secure until someone shows them a screenshot of their own customer database opened from the outside. A penetration test replaces belief with evidence. It tells you which defenses hold and what an attacker would go after first, in the order you should fix them. For a small business the external test is the place to start, because the internet-facing systems are the ones attackers scan constantly. A free first test removes the usual excuse for never having done one, and the report gives you a concrete list to hand to whoever manages your IT.
Penetration Testing: FAQs
What is penetration testing in cyber security?
Penetration testing is a controlled attack on your own systems, performed with permission by security professionals, to find vulnerabilities that could be exploited. Testers use the same techniques criminals use, from scanning and password attacks to phishing, but they stop short of causing damage and instead document what they found and how to fix it. Tests can target external systems, the internal network, web applications, source code, or employees, and the scope is agreed before work begins.
What is the difference between a penetration test and a vulnerability scan?
A vulnerability scan is automated software that lists known weaknesses, such as missing patches or open ports, across many systems quickly. A penetration test is a person actively trying to exploit weaknesses and chain them together to reach sensitive data, then explaining the real-world impact. Scans should run continuously; penetration tests are periodic and deeper. A scan might report that a server is missing a patch, while a test shows that the missing patch let the tester read the payroll folder.
How much does a penetration test cost for a small business?
Cost depends on scope: how many systems are in play and whether custom applications or source code are included. Rather than quote a market range, it helps to know that NetSys performs a Tier 1 external penetration test at no charge for any business, covering the website, public-facing systems, public-record exposure, and phishing likelihood. A Tier 2 source code test is quoted per codebase after a scoping conversation, since the effort depends on the size of the code.
More terms
Phishing
Phishing is a fraud technique in which an attacker poses as a trusted contact, often by email, to trick a person into revealing credentials or sending money.
Patch Management
Patch management is the routine of finding, testing, deploying and verifying software updates so known security holes close before attackers use them.
Principle of Least Privilege
The principle of least privilege is a security rule that gives every user, device and program only the access its job needs, and only for as long as needed.
Passkeys
Passkeys are phishing-resistant credentials that replace passwords with a cryptographic key pair, approved on the user's device with a fingerprint or PIN.
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