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16 January, 2009

Port Scanning

Port Scanning is one of the most popular techniques used by hackers to discover services that can be compromised.

  • A potential target computer runs many ’services’ that listen at ‘well-known’ ‘ports’.

  • By scanning which ports are available on the victim, the hacker finds potential vulnerabilities that can be exploited.

  • Scan techniques can be differentiated broadly into Vanilla, Strobe, Stealth, FTP Bounce, Fragmented Packets, Sweep and UDP Scans.

Port Scanning Techniques

Port Scanning Techniques can be broadly classified into:

  • Open scan

  • Half- open scan

  • Stealth scan

  • Sweeps

  • Misc

Commonly used tools for port scanning

1.Tool: SuperScan 3.0









2. Tool: NMap (Network Mapper)

3. Tool: NetScan Tools Pro 2003

4. Tool: ipEye, IPSecScan

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