Please implement and integrate a GUI for port knocking.
PK adds a simple but effective layer of security.
I imagine the PK GUI to be able to use/add/edit/delete
a list of port knocking "sequences." Each sequence has
one title, one host name, and then an arbitrarily-long,
ordered list of port numbers and protocols (TCP or
UDP). So, a sequence might be:
Title: The office LAN
#1: UDP 12898
#2: TCP 62181
#3: TCP 9999