Added note in todo.txt about adding iptables firewall

marknl

2011-08-09 d85c415aa56c11f27ad7f6b14564ed4b11a4a6ba

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[Definition]
failregex = (?: pop3-login|imap-login): .*(?:Authentication failure|Aborted login \(auth failed|Aborted login \(tried to use disabled|Disconnected \(auth failed).*rip=(?P<host>\S*),.*
ignoreregex =