端口是信息進(jìn)出任何系統(tǒng)的點(diǎn)。掃描端口以發(fā)現(xiàn)系統(tǒng)中的任何環(huán)形孔稱為端口掃描。系統(tǒng)中可能存在黑客攻擊和獲取關(guān)鍵信息的弱點(diǎn)。這些點(diǎn)應(yīng)該被識別并防止任何濫用。常見的Port Scanning類型：
1、Strobe: Scanning of known services.
2、UDP: Scanning of open UDP ports
3、Vanilla: In this scanning the scanner attempts to connect to all 65,535 ports.
4、Sweep: The scanner connects to the same port on more than one machine.
5、Fragmented packets: The scanner sends packet fragments that get through simple packet filters in a firewall
6、Stealth scan: The scanner blocks the scanned computer from recording the port scan activities.
7、FTP bounce: The scanner goes through an FTP server in order to disguise the source of the scan.
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