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