Fail2ban scans log files like /var/log/pwdfail or /var/log/apache/error_log and bans IP that makes too many password failures. It updates firewall rules to reject the IP address. Resources http://www.fail2ban.org/wiki/index.php/Main_Page
SpamAssasin Alternatives
If your tests show that you really can’t use SA, then other choices are dspam and bogofilter. but these are “pure” statistical filters. so you need to train them to get anything. Another choice is FUSSP – Final Ultimate Solution
iptables Video Tutorial Link
Mastering IPTables, Part I. http://www.linuxjournal.com/video/mastering-iptables-part-i
Is ASSP better than SpamAssasin?
As far as I read, ASSP is a great competitor to SpamAssasin. I will give it a chance on my test server and I will generate a report about it. ASSP with ClamAV (make sure you use the Sane Security
POP3/IMAP Graphical Statistics
Have you ever needed to graphically monitor the number of POP3/IMAP connections? couriergraph is exactly what you need. Execution It is a single Perl script, which needs to be executed like this: # /usr/local/couriergraph/couriergraph.pl -l /var/log/mail/info –rrd-name=/var/couriergraph/couriergraph -d Switches The