Quality Security Tools, Jun 14 2008
Description: Portscan detection daemon PortSentry has the ability to detect portscans(including stealth scans) on the network interfaces of your machine. Upon alarm it can block the attacker via hosts.deny, dropped route or firewall rule. It is part of the Abacus program suite.
Description: A portscan detecting tool Scanlogd is a daemon written by Solar Designer to detect portscan attacks on your maschine.