           SPELL=knock
         VERSION=0.5
          SOURCE=$SPELL-$VERSION.tar.gz
SOURCE_DIRECTORY=$BUILD_DIRECTORY/$SPELL-$VERSION
   SOURCE_URL[0]=http://www.zeroflux.org/proj/knock/files/$SOURCE
        WEB_SITE=http://www.zeroflux.org/cgi-bin/cvstrac.cgi/knock/wiki
         ENTERED=20060529
     SOURCE_HASH=sha512:c5f7f3320d4d9a41847dba0cda4d66852f983db419b23d3bf9c83d44a41ba437379bf6cee47a096c600841e321740849dac26d5c3afff9b3ae0178a2fcb6c35e
      LICENSE[0]=GPL
           SHORT="knockd is a port-knock server"
cat << EOF
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.
EOF
