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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