ALERT

[LAST CHANCE] Data Layer: Modern Business, Defined

Port Scanner

Definition - What does Port Scanner mean?

A port scanner refers to a software application program that scans a server for open ports. It enables auditors and network administrators to examine network security while attackers and hackers use it to identify open ports for exploiting and/or running malicious services on a host computer or server.

Port scanners are primarily used by network security administrators to scan and monitor network ports on a system, server or IT environment.

Techopedia explains Port Scanner

Port scanners work by attempting to connect to all or a set of predefined ports on a system that provides network or application access. Depending on the capabilities of the port scanner or scan requirements, a port scanner may have several operation modes including:

  • Vanilla: Probes and scans all ports on a system/server.
  • Strobe: Only selected ports are scanned or probed.
  • UDP: Scans for open UDP ports.
  • Sweep: A similar port number is probed on more than one computer.
Although a port scanner is designed to aid network administrators in strengthening security, if used unethically by hackers it can reveal open ports that could be exploited.

Techopedia Deals

Connect with us

Techopedia on Linkedin
Techopedia on Linkedin
Tweat cdn.techopedia.com
"Techopedia" on Twitter


'@Techopedia'
Sign up for Techopedia's Free Newsletter!

Email Newsletter

Join thousands of others with our weekly newsletter

Resources
The 4th Era of IT Infrastructure: Superconverged Systems
The 4th Era of IT Infrastructure: Superconverged Systems:
Learn the benefits and limitations of the 3 generations of IT infrastructure – siloed, converged and hyperconverged – and discover how the 4th...
Approaches and Benefits of Network Virtualization
Approaches and Benefits of Network Virtualization:
Businesses today aspire to achieve a software-defined datacenter (SDDC) to enhance business agility and reduce operational complexity. However, the...
Free E-Book: Public Cloud Guide
Free E-Book: Public Cloud Guide:
This white paper is for leaders of Operations, Engineering, or Infrastructure teams who are creating or executing an IT roadmap.
Free Tool: Virtual Health Monitor
Free Tool: Virtual Health Monitor:
Virtual Health Monitor is a free virtualization monitoring and reporting tool for VMware, Hyper-V, RHEV, and XenServer environments.
Free 30 Day Trial – Turbonomic
Free 30 Day Trial – Turbonomic:
Turbonomic delivers an autonomic platform where virtual and cloud environments self-manage in real-time to assure application performance.