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