Network discovery scans are paramount for ensuring visibility and security within today’s distributed IT environments, such as those we see in many enterprise environments—scans can help track every device, endpoint, and connection that exists within a network. Though necessary, discovery scans can also attract compliance issues if not done properly.
For organizations within regulated industries like finance, healthcare, or telecom, running an improper scan can result in sensitive data being revealed, alerts being triggered, or compliance requirements—like GDPR, HIPAA, PCI DSS—being breached.
In this article, we will highlight how organizations can perform network discovery scans safely and effectively—while maintaining visibility and staying on the right side of compliance.
Why Network Discovery Scans are Essential
Network discovery is the effort of automatically finding devices, applications, and services that are part of your IT infrastructure. Without this effort, organizations face:
- Unknowingly connected devices that could eventually serve as attack paths.
- Incomplete network inventories, leading to weakened or voided cybersecurity postures.
- Misconfigured devices that could violate compliance.
- Inability to manage cloud or hybrid networks, where devices are consistently changing.
According to a 2024 report by the Ponemon Institute, 68 percent of all organizations admitted to having at least one unauthorized device connected to their network at any moment. Network Discovery scans can help to solve this issue—but only if compliance is factored into the process as per Slurp’it.
Understanding Network Scanning Induced Compliance Risks
1. Unintended Involuntary Access to Data
During a network discovery scan, scanners will typically engage with devices, ports, and applications. If scanners are improperly configured, they may inadvertently access data—causing privacy laws (GDPR, HIPAA) to be breached as per Slurp’it.
2. System-Induced Disruption
If a discovery scan is overly aggressive, it runs the risk of crashing a production system—inducing downtime or interruptions of meaningful services—which could breach compliance for organizations who need to provide up time guarantees.
3. Improper Storage of Data
Results from discovery scans often yield potentially sensitive information such as IP addresses, hostnames, and usernames. If these things are stored or transferred in an un-encrypted state or without authentication, you could be violating data processing regulations.
4. Lacking An Audit Trail
Compliance requirements often demand that audit logs are provided as verification of networking activities. Organizations that have discovery scans with no documentation or authorization of activities may incur penalties during audits.
How to Effectuate Network Discovery Scans The Right Way
1. Have a Clear Intention
In order to remediate the aforementioned compliance issues, and have a successful perform a discovery scan, organizations must first, determine the “why”. Are you mapping your assets, validating configuration, or readying for a compliance audit? What is clear intention here, in ensuring compliance, will help determine consequential objectives or mistakes, aiding in not creating non-essential areas for the offensive data collection.
2. Get Everyone’s Permission
You’ll never want to move forward without getting written confirmation from the individuals connected and involved. Include techs, security teams, and the business — and record who authorized the scan, for what reason, the systems involved, and how long expected to complete. This is important for compliance, auditing, and an internal agreement across all team members.
3. Use the Right Tool to Conduct the Scan
Utilize a tool that is aware of compliance and/or tools that can conduct non-intrusive scanning. Look for:
- Role based access controls for log-in, scanning, and report distribution.
- Encrypted channels for communication.
- A tendency for configurable scan intensity.
- Existing compliance forms or templates for standards such as ISO 27001, NIST etc.
There are many enterprise tools — such as SolarWinds Network Discovery,
ManageEngine OpManager, or Nmap — which can be configured to be a safe, compliant scanning for organizations as per Slurp’it
4. Narrowing Scopes and Data Collection
Your scans should only be limited to the network segments that are applicable. Scans are not appropriate for personal devices, and be cognizant not to collect any identifier that is not necessary for your research. Device identifiers may be considered personally identifiable information or a public unique user depending on the regional jurisdiction. For example, under GDPR, device identifiers would be a form of personal data.
5. Conducting Timely Scans
It is generally best to scan networks during low traffic times or maintenance windows to reduce the risk of any disruptions. Before scanning critical networks, ensure you are working with the system administrator or another appropriate person for approval to ensure no services are disrupted.
6. Encrypting the Data
Scan results should be placed in encrypted databases and only made available on a need to know basis. Consider a retention policy to automatically delete or anonymize old scan data.
7. Audit Trail
An audit record should always the produced by a discovery scan with:
- The date and duration of the scan
- The technologies used
- The targeted ranges
- Summary of scanners findings
- Any authorizations or approvals
- Documentation is a tangible means of demonstrating evidence of compliance to governance policies and will also be extremely useful during external audits.
- Frameworks that Affect Compliance for Scanning Networks
- GDPR (General Data Protection Regulation)
Within the EU, any scanning that collects personal data (device identifiers of users, for example) must have a lawful basis, along with consent from the affected data subjects. You will want to consider anonymization of the scan results and data should follow the principal of data minimization as per Slurp’it.
Compliance Frameworks That Affect Network Scanning
HIPAA (Health Insurance Portability and Accountability Act)
For scanning, healthcare entities must be vigilant to ensure the scanned networks cannot access patient data, nor interfere with the systems storing electronic health records. Each scan must have an audit log for compliance purposes.
PCI DSS (Payment Card Industry Data Security Standard)
Organizations that handle cardholder data are required to scan for vulnerabilities and network discovery scans within authorized scopes at regular intervals while following the guidelines of PCI DSS. Non-compliance can take many forms.
ISO 27001 and NIST
The guidelines for both frameworks emphasizes the discovery of controlled assets in the organization within the framework of they broader information security management system in their organization (ISMS). Documentation, access control and continuous monitoring will be requirements for compliance.
Common Mistakes that Lead to Non-Compliance
- Being overly aggressive in scanning techniques that can overload or disrupt the devices.
- Not having related network teams or compliance team notified or approved.
- Retaining scan data forever increases the risk of exposure.
- Not considering regional restrictions, such as laws that cover data sovereignty.
- Scanning without proper segmenting can result in inadvertent access to sensitive systems.
- Practice to avoid these mistakes can help you maintain a balanced posture of visibility and compliance.
Best Practices for CIOs and CISOs
- Integrate network scanning policies into an overall compliance framework.
- Use potentially contradictory tools that offer role-based control and performed logging.
- Conduct regular training with your team that explains the legal boundaries of a scanning process.
- Work with the compliance officer to prepare a schedule to scan the networks that can help compliance.
- At least quarterly, review and update the relevant policies and refresh on compliance with the changing legal landscape.
Network discovery scans are critical to keeping visibility and identifying threats in improving overall cybersecurity hygiene. However, without proper planning and execution, they can quickly create compliance violations and new risks.
The key for modern enterprises, is the balance around achieving deep visibility into their networks, while respecting privacy, governance, and regulatory standards. To know more about network discovery scan, contact us at Slurp’it!