Ideas for Securing my FTP Server

[luis.mgarc at gmail.com (Luis M.)]

What about using Port Knocking or Single Packet Authorization?

That way you'd have port 21 closed at all times, until you "knock" on
your firewall's door so it opens port 21 for your current IP address.
There are some nice&free cryptography-based PK and SPA systems out there.



Shaun Curry wrote:
> 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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