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Old 05-04-2005, 03:21 AM   #1
SlAiD
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Brute Force Detection for iptables


Hi;

I need a Brute Force Detection to iptables but it need to block automatly (ip for a day or someting) if for example 10 logins falures.

I need too a notification by e-mail.

It is possible?
 
Old 05-04-2005, 07:46 AM   #2
Capt_Caveman
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Iptables probably is not the most effective way to deal with bruteforce attacks. You can try limiting the number of simultaneous connection attempts, but that is a rather crude way of dealing with it. Using PAM or tcp wrappers (hosts.allow/deny) would probably be better.

Also take a look here.
 
Old 05-05-2005, 01:58 PM   #3
SlAiD
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Hi;

I need to add the code in my iptables file rules, right?
How i know what is it?
Then i make a simple 'paste' and use service firewall restart?

I'm a litle n00b with linux... sorry-
 
Old 05-05-2005, 04:03 PM   #4
Capt_Caveman
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Read the comments at the top of the code for instructions on running it. All you need to do for iptables is:
iptables -N BLACKLIST
iptables -I INPUT -p tcp --dport 22 -j BLACKLIST

The code will then parse the system logs for repeated failed logins and dynamically add offending IPs to the BLACKLIST chain.
 
  


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