help config. rc.local

I'm have a novice Linux question configuring rc.local.

I have completed a firewall assistance script online and the file is delivered as a script file for placement in the rc.local file. But the syntax is left to be known. Here is how the script notes describe installation:


# /etc/rc.d/rc.firewall
# Invoked from /etc/rc.d/rc.local.


Well, that leaves a lot to be guessed at. Can anyone help?

Thanks.

Once I figured it was basically a shell script I just called it from the rc.local file as shown above.

Works great.

But it still blocks FTP connections!

Tim