Disable IP address

I am looking for an upgrade to Apple's security that will automatically block access from a given IP when some threshold of invalid attempts to login are made from that address.
Although root is disabled and my privileged account has a hardened password that is changed frequently, my logs are filled with failed login attempts. Some of these attacks are very severe, with as many as four attempts per second for hours.
FYI, the worst attacks come from South Korea but I get a fair share from the US.

I'm not sure of your current network configuration, but from what I can tell, you have a computer connected to an "always-on" type of Internet connection (cable, DSL, LAN) etc... with no hardware based firewall device between you and the Internet.
At any rate, here are a few things for you to consider:
1 - Turn on the built in Firewall (System Preferences)
2 - Disable SSH and Remote Desktop unless you absolutely need to log in from a different physical location.
3 - Disable File Sharing - If you're not behind a hardware based firewall, file sharing is not the best idea.
With the firewall enabled and all remote services disabled, an attacker will not even be prompted to log-in, as the ports to do so will no longer be visible to them.
Not sure if this helps - if not, you may want to give a little bit more information about your current network configuration
KS
20" iMac G5 2.1Ghz iSight   Mac OS X (10.4.8)   17" PowerBook G4 1.67Ghz

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