Ideas for Securing my FTP Server

[shauncurry1 at gmail.com (Shaun Curry)]

Hello all!

Does anyone have suggestions for my current situation?  I have found that
someone has been trying to brute-force login to my FTP Server, so far they
have been unsuccessful.  I don't think they are using any tools or software
to do this.  They have just been using a user name like administrador and
trying passwords til it times out.  I have blocked his IP, but that can be
changed easily.  I have his IP and thats about it.  Can I simple change the
port that my FTP connects on?  This should reduce the risk of someone
"stumbling" onto my ftp, right?

Any ideas on a cheap IDS (aka free) system that might catch something like
this in the future.

Thanks
Shaun
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