SSHD and SSH Call-out via Port Knocking

I finally took the time to flesh out an idea that I'd had for some time.  The 
idea was pretty simple, a semi-secure way of having the SSH server allow remote 
connectivity, without having an SSHD listener always on.

It took a couple of hours to write, test, re-write, re-test, etc both versions.

Both versions use a series of scripts to write numerals into a temporary file 
via knocks on specific ports.  This file is then read when one of two ports are 
knocked after having 12 digits written to the file.

One port, reads the temporary file, builds the IP address, then creates an 
iptables entry that allows the specified IP address to connect via SSH for 
approximately 30 seconds.  It then closes the SSHD daemon, and drops the 
iptables entry.

The second port, reads the temporary file, builds the IP address, then causes 
SSH to connect to the specified IP address with a backchannel defined.  This 
allows the remote client to ssh into the server via this backchannel.

Would there be any interest in seeing the sample shell scripts that I have 
written for Redhat Enterprise and SuSE Enterprise Linux?

Is this even something anyone would like to do?