About: http://webisa.webdatacommons.org/73449794

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	[barricade is] a simple implementation of the port knocking method aimed to open your network service or firewall only if a special icmp echo request packet is sniffed from the network interface.
http://www.w3.org/ns/prov#wasQuotedFrom	portknocking.org