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immedate
2011 Feb 21
1
iptables question.
We use a home-brew system similar to fail2ban to block traffic from IP
addresses which appear to be doing Nasty Things(tm). The main thing our
system does that fail2ban doesn't is to use a central DNSRBL we maintain
allowing it to immedatiately ban listed IP addresses the first time they
make an attempt to connection without waiting for them to hit a sufficient
number of times to bring up the block.
This system sends e-mail messages to our security alias whenever a blocking
even occurs, either from tcp_wrappers or swatch log watcher...