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Network security device vulnerability scan

Fiber optic splice closure knowledge brief Published 22 Apr 2024

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Network security device vulnerability scanning identifies, assesses, and prioritizes weaknesses in network devices to prevent exploitation and strengthen overall security.What is Network Vulnerability Scanning?

Network vulnerability scanning is the process of discovering all devices, open ports, and potential vulnerabilities on a network to gain visibility and reduce risk. Scanners send probes to devices and analyze responses to detect outdated software, misconfigurations, unnecessary services, and security gaps. This helps organizations identify unmanaged devices, close open ports, and ensure compliance with standards like PCI DSS and HIPAA ( ).

Types of Scanning
  1. Authenticated Scans: These scans use credentials to access devices and gather detailed information about configurations and vulnerabilities. For network devices like switches, routers, firewalls, and VPN gateways, authenticated scans can query SNMPv2 or SNMPv3 to assess vulnerabilities without installing agents ( ).
  2. Unauthenticated Scans: These scans detect vulnerabilities from an external perspective without credentials, simulating an attacker's view.
  3. Continuous or Scheduled Scans: Regular scans ensure new devices or changes in the network are assessed promptly, reducing blind spots ( ).
Key Steps for Network Device Scanning
  • Select a scanning device: Choose a device with network access to the management ports of target devices ( ).
  • Enable SNMP read-only access: Required for authenticated scans; write access is not necessary.
  • Obtain IP addresses and credentials: Collect the IP ranges and SNMP credentials for all devices to be scanned.
  • Configure scan jobs: Define targets, scan intervals, and authentication methods. Azure KeyVault can be used to securely manage credentials ( ).
  • Test connectivity and credentials: Perform a test scan to verify proper setup and avoid duplication in inventory ( ).
Tools and Platforms

Several tools are available for network vulnerability scanning:

  • Tenable/Nessus: Enterprise-grade scanner for networks, endpoints, and web applications, providing severity scoring and remediation guidance ( ).
  • OpenVAS: Free, open-source vulnerability scanner for Linux, accessible on Windows via VM ( ).
  • CrowdStrike Falcon Exposure Management: AI-powered platform offering continuous, localized scanning with real-time prioritization and automated remediation ( ).
  • Paessler PRTG: Monitors network traffic, logs, and ports, providing vulnerability alerts ( ).
  • Other tools: SecPod SanerNow, Intruder, SolarWinds NCM, and ImmuniWeb offer varying levels of scanning, reporting, and remediation capabilities ( ).
Best Practices
  • Scan all network devices regularly to detect new vulnerabilities.
  • Prioritize remediation based on severity and business impact.
  • Maintain accurate inventory of devices and IP addresses to avoid duplication.
  • Integrate scanning with IT workflows for automated patching and configuration management.
  • Use multiple tools if necessary to cover endpoints, cloud assets, and web applications ( ).
Benefits
  • Improved visibility of all network-connected devices.
  • Early detection of vulnerabilities before attackers exploit them.
  • Compliance support for regulatory standards.
  • Reduced risk exposure through prioritized remediation and continuous monitoring ( ). Network security device vulnerability scanning is essential for maintaining a proactive security posture, ensuring that all network devices are continuously monitored, vulnerabilities are identified, and risks are mitigated efficiently.

Network security device vulnerability scan - RIVO MULTITRADE OPTICAL SYSTEMS [PDF]

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