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iftop vs Nessus

Professional comparison and analysis to help you choose the right software solution for your needs.

iftop icon
iftop
Nessus icon
Nessus

iftop vs Nessus: The Verdict

⚡ Summary:

iftop: iftop is an open source command-line tool used to monitor network usage and bandwidth in real-time. It displays a table of current TCP/IP connections using bandwidth over a specified interface.

Nessus: Nessus is a vulnerability scanner used to scan networks and systems for security vulnerabilities. It is one of the most popular vulnerability assessment tools.

Both tools serve their respective audiences. Compare the features, pricing, and user ratings above to determine which best fits your needs.

Last updated: May 2026 · Comparison by Sugggest Editorial Team

Feature iftop Nessus
Sugggest Score — —
Category Network & Admin Security & Privacy
Pricing Open Source —

Product Overview

iftop
iftop

Description: iftop is an open source command-line tool used to monitor network usage and bandwidth in real-time. It displays a table of current TCP/IP connections using bandwidth over a specified interface.

Type: software

Pricing: Open Source

Nessus
Nessus

Description: Nessus is a vulnerability scanner used to scan networks and systems for security vulnerabilities. It is one of the most popular vulnerability assessment tools.

Type: software

Key Features Comparison

iftop
iftop Features
  • Displays bandwidth usage on selected network interface
  • Shows both inbound and outbound traffic
  • Can filter by IP address or network port
  • Real-time monitoring and stats
  • Text-based interface for terminal/CLI use
Nessus
Nessus Features
  • Vulnerability scanning
  • Compliance auditing
  • Web application scanning
  • Malware detection
  • Configuration auditing

Pros & Cons Analysis

iftop
iftop

Pros

  • Free and open source
  • Lightweight and low resource usage
  • Easy to use with no configuration needed
  • Good for identifying bandwidth hogs and monitoring network usage
  • Works on Linux, Unix, and BSD systems

Cons

  • Terminal-only, no GUI
  • Can only monitor one interface at a time
  • Not as feature-rich as commercial bandwidth monitors
  • Requires some Linux/Unix command line knowledge to use
  • Does not work on Windows
Nessus
Nessus

Pros

  • Wide range of vulnerability checks
  • User-friendly interface
  • Regular plugin updates
  • Integrates with other Tenable products
  • Can customize scans and policies

Cons

  • Limited mobile device scanning
  • No built-in remediation capabilities
  • Some advanced features require additional purchase

Pricing Comparison

iftop
iftop
  • Open Source
Nessus
Nessus
  • Not listed

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Learn More About Each Product

iftop
iftop
Reviews, pricing & alternatives →
Nessus
Nessus
Reviews, pricing & alternatives →

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