{"name":"knock","portdir":"net/knock","version":"0.7.8-20151227","license":"GPL-2","platforms":"darwin","epoch":0,"replaced_by":null,"homepage":"https://www.zeroflux.org/projects/knock","description":"A port-knocking implementation","long_description":"knockd is a port-knock server. It listens to all traffic on an ethernet (or PPP) interface, looking for special knock sequences of port-hits. A client makes these port-hits by sending a TCP (or UDP) packet to a port on the server. This port need not be open -- since knockd listens at the link-layer level, it sees all traffic even if it's destined for a closed port. When the server detects a specific sequence of port-hits, it runs a command defined in its configuration file. This can be used to open up holes in a firewall for quick access.","active":true,"categories":["net"],"maintainers":[],"variants":["universal"],"dependencies":[{"type":"build","ports":["autoconf","automake","libtool","clang-17"]},{"type":"lib","ports":["libpcap"]}],"depends_on":[]}