External network penetration testing
Assess authorized internet-facing systems, remote-access services, and exposed network services. Investigate exploitable weaknesses and the impact that can be demonstrated from an external starting point.
Services · Reduce Risk
Penetration Testing Services
Find exploitable weaknesses. Know what to fix next.
Network and web application penetration testing with expert investigation, practical evidence, and remediation guidance. Based in Houston, Network Box USA serves organizations across North America.
Choose the scope
Test the systems and access paths that matter.
A useful penetration test starts with a specific question: can exposed services be compromised, what can an internal foothold reach, or do application permissions protect the right data? Match the engagement to that question.
Internal network penetration testing
Begin from an agreed internal connection or account. Examine access controls, privilege escalation, and paths between systems to understand what an initial foothold could enable.
Web application penetration testing
Assess the agreed application functions, accounts, and access boundaries. Define the roles and workflows to test so the results address how your application is actually used.
Wireless and additional assessments
Include wireless security, rogue access points, or optional social engineering when relevant and explicitly authorized. Each addition needs its own targets, rules, and coverage boundaries.
Unsure where to start? Read our internal vs. external penetration testing guide. For application testing, use the test account preparation checklist.
Validation, with context
Move from potential weaknesses to demonstrated risk.
Vulnerability scanning identifies potential issues. Penetration testing investigates exploitability and impact under agreed conditions, so your team can understand which findings warrant action and why.
Automation supports discovery and repeatable checks. Expert investigation helps evaluate access boundaries, connected weaknesses, and business context. What matters is the evidence behind each conclusion and a clear account of what was not tested.
A test is a point-in-time assessment. It complements ongoing monitoring and protection; it does not replace them or guarantee that every weakness has been found.
Understand automated testing evidence →Follow the evidenceIllustrative workflow
- Potential issueDiscover the exposure
- Controlled validationTest the agreed path
- Documented impactPrioritize the response
How the engagement works
From a clear question to a practical remediation plan.
Agree on the starting position and the information testers receive. Black-box, gray-box, and white-box approaches describe different levels of prior knowledge and access; internal and external describe different starting points.
- 01Define the scope and authorize the work
Agree on the business question, assets, testing approach, access, schedule, exclusions, and escalation contacts. Establish rules of engagement before testing begins.
- 02Test the agreed attack paths
Use discovery, testing tools, and expert investigation to evaluate weaknesses within the authorized boundaries. Record restrictions that prevent a question from being fully assessed.
- 03Explain the findings and demonstrated impact
Connect technical evidence to affected systems and business risk. Distinguish observed results from potential consequences, and give technical teams and leadership usable reporting.
- 04Prioritize remediation and agree on retesting
Use the findings to plan fixes, assign ownership, and address the highest-priority exposure. Retesting validates the agreed fixes within the follow-up scope.
Deliverables
Useful to the people fixing issues and the people making decisions.
Evidence of the observed behavior, affected systems, demonstrated impact, and remediation guidance. Findings should distinguish verified results from inferred consequences.
Business context, risk prioritization, and the decisions that need attention. Technical severity becomes more useful when connected to the systems and work it affects.
Documented scope, exclusions, testing limitations, and agreed retesting. A clean finding elsewhere does not validate a system or workflow that was excluded.
If you need evidence for a customer, insurer, or compliance program, bring the actual requirement to the scoping discussion. Confirm the method, report, timing, and retest expectations before commissioning the work.
A scope your team can use
Penetration testing for small businesses and larger environments.
A small business may need to validate exposed services or meet a customer's assessment requirement. A larger organization may need separate network and application scopes with multiple owners.
Start with the business-critical systems, material changes, or access boundaries you need to understand. Define the assets and exclusions, reporting audience, and who will own remediation. For MSP-supported environments, include the people responsible for the systems and approvals.
A focused engagement should be explicit about its limits. Expand coverage when the underlying question requires it, rather than assuming a narrower test represents the whole organization.
Security support for small and medium businesses →Define the boundaryIllustrative scope
Houston headquarters · North American coverage
Plan the engagement around your environment.
Network Box USA is based in Houston and works with organizations across North America. We agree on connectivity, authorized access, location requirements, and testing windows during scoping.
- The business question, customer requirement, or compliance objective.
- The types and approximate counts of systems or applications.
- Whether you need external, internal, application, or combined testing.
- Key application roles, locations, and access constraints.
- Your deadline, reporting needs, and retesting expectations.
- Authorized targets, starting access, and testing methods.
- Permitted activities, exclusions, and third-party approvals.
- Testing windows, escalation contacts, and stop conditions.
- Evidence handling, report delivery, and follow-up scope.
Pricing is provided privately after scoping. Use the contact form for an initial description; do not include passwords or other access credentials.
Illustrative planning example
Read a finding without expanding its conclusion
An authorized test account can read a record belonging to a different application role.
- Observed evidence
- Record the approved target, starting role, exact tested action, result, and affected data category; redact sensitive values.
- Limits
- Distinguish the demonstrated access from other records, roles, systems, or attack paths that were not tested.
- Remediation and retest
- Assign the authorization fix, then retest the original action and relevant permitted workflows within the agreed scope.
This is a planning example, not a customer incident or a promise that a particular product integration is supported. Confirm the actual scope during service design.
Compare evidence and inference →Penetration testing FAQ
Questions to settle before testing begins.
What does a penetration test include?
The engagement defines authorized targets, starting access, permitted techniques, exclusions, and reporting requirements. Depending on scope, testing can cover external or internal networks, web applications, and wireless environments. Deliverables include technical findings, evidence of demonstrated impact, risk prioritization, an executive summary, and remediation guidance. Agree on retesting and its boundaries in the proposal.
How is penetration testing different from a vulnerability scan?
A vulnerability scan identifies potential weaknesses. Penetration testing investigates whether weaknesses can be exploited within agreed rules and documents the impact demonstrated. Automated tools can support both activities; the method, validation, and evidence determine what the result establishes.
Do we need internal or external network penetration testing?
External testing evaluates authorized internet-facing systems from outside your network. Internal testing starts from an agreed foothold, such as an internal connection or ordinary user account, to assess reachable systems and access boundaries. Choose based on the question you need answered; combining both can cover different attack paths.
Can a small business arrange a focused penetration test?
Yes. Begin with the systems that support critical work, exposed services, or a specific customer requirement. A defined scope helps a small team prioritize remediation and understand what was not tested. Broader coverage can be considered as the environment and requirements change.
Do you provide penetration testing outside Houston?
Network Box USA is headquartered in Houston and serves organizations across North America. Location, connectivity, authorized access, and any on-site requirements are agreed during scoping.
How do we get a penetration testing quote?
Describe the systems to assess, the business or compliance requirement, target dates, and whether you need external, internal, or application testing. Asset counts, application roles, access arrangements, reporting, and retesting requirements help define the proposal. Pricing is provided privately after scoping.
Does passing a penetration test prove we are secure or compliant?
No. A penetration test reports results for a defined scope, method, and period. Excluded or untested systems are not validated by a clean result. Testing can support compliance evidence, but it does not by itself establish certification or satisfy every applicable requirement.
Your next step
Tell us what you need to validate.
Share your environment, objective, and target date. We’ll help define the penetration testing scope and provide a private quote.
Request a Penetration Testing Quote