Brute force attack, exponential delay for reconnect?

From: S P Arif Sahari Wibowo (arifsaha_at_yahoo.com)
Date: 05/30/05 

Date: Mon, 30 May 2005 15:15:24 -0400

Hi!

The machines I look after have been getting very bad brute force attack
on the openssh login. Sometime the machines just become locked up,
although I am not sure it is related. Some of the user names are easily
guessable and attacked, but I don't have the option to close
password-based login.

Any advice for this situation?

I think one good way to reduce the attack is having controllable delay
between reconnection from same IP. Ideally the delay should
exponentially increase for every failed login attempt. Is there any
configurations or patches that will allow such thing?

Thank you! 

-- 
                              Stephan Paul Arif Sahari Wibowo
   _____  _____  _____  _____
  /____  /____/ /____/ /____
 _____/ /      /    / _____/       http://www.arifsaha.com/

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