knock: knock (a port-knock server)
knock:
knock: This is a port-knocking server/client.  Port-knocking is a method
knock: where a server can sniff one of its interfaces for a special "knock"
knock: sequence of port-hits.  When detected, it will run a specified event
knock: bound to that port knock sequence.  These port-hits need not be on
knock: open ports, since we use libpcap to sniff the raw interface traffic.
knock:
knock:
knock: Homepage: http://www.zeroflux.org/cgi-bin/cvstrac.cgi/knock/wiki
knock: